CN215278374U

CN215278374U - Lump ore screening and drying integrated pretreatment system

Info

Publication number: CN215278374U
Application number: CN202120608711.2U
Authority: CN
Inventors: 刘琳; 赵强
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-24
Anticipated expiration: 2031-03-25

Abstract

A lump ore screening and drying integrated pretreatment system comprises a lump ore conveying device (D1), a lump ore storage bin (1) and a heat medium conveying pipeline (L1); the lump ore storage bin (1) is provided with a lump ore feeding hole (101), a lump ore discharging hole (102), a heat medium inlet (103) and a heat medium outlet (104); the lump ore conveying device (D1) is connected to the lump ore feed inlet (101) of the lump ore storage bin (1); the heat medium conveying pipeline (L1) is connected to a heat medium inlet (103) of the lump ore storage bin (1); the lump ore storage bin (1) is internally provided with a distributed blanking device (2). The utility model discloses a system simple and easy, practical, reliable for screening and stoving promote each other, effectively reduce lump ore pretreatment cost, solve the difficult problem that the lump ore is gone into the stove and is added the rate low, improved the lump ore of blast furnace and gone into stove proportion and gas permeability level, effectively reduced blast furnace manufacturing cost, improved the blast furnace level of going in the same direction as a journey.

Description

Lump ore screening and drying integrated pretreatment system

Technical Field

The utility model provides a lump ore pretreatment systems, concretely relates to system to high moisture, many powder lump ore deposit sieve and integrative preliminary treatment of stoving belongs to steel smelting technical field.

Background

The consumption of steel as an irreplaceable structural and functional material in the industrialization process occupies more than 95 percent of the total consumption of metal in a long time. The raw pig iron materials required by the iron and steel industry are mainly provided by blast furnace smelting, and the improvement of the blast furnace smelting technology and the reduction of the cost have profound significance for promoting the development of iron and steel enterprises. The basic link of blast furnace intensified smelting is fine material operation, natural lump ore is used as one of the main components of the charging material, and the addition amount of the natural lump ore can reach 30 percent at most. Because the lump ore powder content and the moisture content are high, after the lump ore is put into a furnace, energy is consumed for moisture drying, a certain time is needed in the drying process, the powder content influences the air permeability of a blast furnace charge layer, the coke ratio of the blast furnace is improved, the smelting cost of the blast furnace is increased, and the stability of the furnace condition is influenced.

Common furnace charging materials for blast furnaces include sintered ores, pellets and natural lump ores. The reasonable blast furnace charging material structure is that the optimum matching proportion of different types of iron-containing ores is found out by adjusting the proportion of sintered ores, pellets and natural lump ores in the iron ores fed into the furnace, so that various economic and technical indexes of blast furnace smelting under the charging material structure are relatively ideal, and the consumption cost of unit pig iron smelting is relatively lowest. Research shows that the cost expenditure of iron ore and other raw material links accounts for about 60% of the total pig iron cost, the market price of lump ore is basically equal to that of fine ore, the cost price is far lower than that of sinter and pellet ore, and the improvement of the charging proportion of the lump ore is an effective measure for reducing the raw material cost of a blast furnace. At present, the charging proportion of lump ore is generally 5-15%, and the proportion is low, and the reason is that the charging proportion of the lump ore is high in powder and water content. The powder content of the iron ore lump ore is generally 10-30%, and if the lump ore with high powder content is not screened and directly enters a blast furnace system, the harm to the air permeability of a blast furnace charge layer is serious, the smelting coke ratio of the blast furnace is improved, and the production index of the blast furnace is reduced. The water content of the iron ore lump ore is generally 8-15%, and the water content of the lump ore in rainy season of individual port steel mills even exceeds 20%. After the high-moisture lump ore is fed into the furnace, energy is consumed for moisture drying, a certain time is needed in the drying process, and the coke ratio of the blast furnace is improved.

Therefore, the reduction of the lump ore powder and the moisture content has important significance for reducing the iron-making cost and enhancing the stability of the furnace condition. At present, lump ore drying systems have the difficult problems of high construction cost, low drying efficiency, high energy consumption and the like.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems that the iron ore lump ore powder is large, the moisture content is high, and after the high-powder and high-moisture lump ore is charged into the furnace, the powder content is high, the air permeability of the blast furnace is influenced, the energy is consumed for moisture drying, a certain time is needed in the drying process, and the coke ratio of the blast furnace is improved, researches show that the lump ore is screened and dried in a storage bin by using a heat medium to be feasible, the powder and the moisture content of the charged lump ore can be effectively reduced, the energy consumption required by drying can be greatly reduced, the charging proportion of the screened and dried lump ore can be improved to a certain degree, and the smelting cost of the blast furnace is reduced.

In addition, through research discovery, lump ore exists in the storage silo with the state of piling up, especially the existence of fine material, leads to the whole material gas permeability deviation of feed bin, and the hot gas flow can't pierce through the material body smoothly, leads to drying effect not good enough, and feed bin upper portion temperature is less than moisture dew point temperature and easily leads to the steam condensation, causes harm to dust pelletizing system moreover.

The utility model discloses a stoving process utilizes the abundant characteristics of the hot waste gas resource of steel flow, introduces lump ore storage silo with hot waste gas nearby, directly carries out the drying to the material in the storehouse, reduces the moisture of lump ore. And simultaneously, the utility model discloses be equipped with the unloader that distributes in lump ore storage silo, just be equipped with the sieve mesh on the unloader that distributes, accomplish the screening process when promoting the stoving process completion quality promptly, realize screening and stoving integration.

Further, the utility model discloses a to the shortcoming that lump ore screening and stoving exist in the storage silo, plan to adopt step screening and multilayer roll unloading method, the multilayer is by upper portion flitch and the distribution unloader that lower part flitch constitutes in the lump ore storage silo top-down branch limit interval arrangement, forms "Z" shape piece ore deposit unloading passageway. The upper layer divides flitch and lump ore direct contact and is provided with the sieve mesh, and the fine material under the sieve is then discharged from the powder bin outlet of lower part flitch and storage silo lateral wall junction. The heat medium enters the storage bin from the lower part of the storage bin and is discharged to the dust removal system from the upper part of the storage bin, the heat medium is fully distributed in the whole lump ore storage bin, and the moisture of the lump ore is removed. The thermal medium can also be discharged from the powder discharge port of each layer of distribution discharge device, the thermal medium is discharged after contacting and heat exchanging with the lump ore entering the lump ore storage bin, and the fine-grained materials screened by the sieve holes of the material distribution plate are simultaneously taken out of the storage bin while the thermal medium is discharged. The arrangement of the feeding channel of the Z-shaped lump ore ensures that the lump ore is in a rolling state in the storage bin, and the lump ore is screened in multiple stages through each layer of sieve pores in the rolling and falling process, so that the air permeability of the whole bin body is greatly improved; in addition, the contact time of the lump ore and the heat medium is prolonged, the heat exchange effect of the heat medium and the lump ore is improved, and the screening and drying effects are enhanced. The utility model discloses a system simple and easy, practical, reliable, the abundant characteristics of make full use of steel mill hot waste gas resource effectively reduce lump ore preliminary treatment cost, solve the lump ore and go into a stove and add the difficult problem that the rate is low, improved the lump ore of blast furnace and gone into stove proportion and gas permeability level, effectively reduced blast furnace manufacturing cost, improved the blast furnace level of going forward.

Furthermore, the patent of the utility model discloses a pretreatment methods for screening and stoving lump ore. The utility model discloses to the powder that natural lump ore exists and the high difficult problem of moisture content, provided the method that adopts step screening and multilayer roll unloading, utilized the hot waste gas of steel process directly to carry out screening and dry method to the lump ore in the storage silo. Firstly, hot waste gas is introduced to increase the temperature of the storage bin, and the temperature level is stabilized for a certain time. Then, the lump ore materials are added from the upper part and roll to pass through a 'Z' -shaped lump ore blanking channel formed by a plurality of layers of distributed blanking devices arranged at intervals at different sides. Lump ore continuously falls from the blanking channel of the Z-shaped lump ore, airflow is continuously introduced into the storage bin, the lump ore is in a flowing state and carries out gas-solid exchange with hot waste gas, and hot airflow is distributed over the whole storage bin, so that the moisture content of the lump ore is reduced. Meanwhile, the powder attached to the lump ore is screened through the sieve holes arranged on the distributed blanking devices of all the layers, and the screened powder is discharged through the powder discharge ports of the distributed blanking devices of all the layers, so that multi-stage screening is realized, and the powder content of the lump ore is reduced. And the air flow is discharged to a dust removal system from a heat medium outlet on the storage bin, and the dried oversize materials (namely large-particle-size lump ores) are conveyed to a blast furnace feeding system from the lower part of the storage bin. And the feeding port and/or the discharging port are/is respectively provided with a moisture detector, and the air quantity or the air speed of the fan is reasonably adjusted according to moisture detection data, or the included angle between the layered blanking device and the side wall of the lump ore storage bin is correspondingly adjusted. The utility model discloses a can increase substantially the contact efficiency of hot gas flow and lump ore, storehouse body gas permeability obtains improving, and screening and stoving effect are strengthened. The utility model discloses a popularization has good economic benefits and environmental benefit, is expected to open up a more stable efficient way for lump ore pretreatment process in the development of china.

According to the utility model discloses a first embodiment provides a lump ore screening and integrative pretreatment systems of drying.

A lump ore screening and drying integrated pretreatment system comprises a lump ore conveying device, a lump ore storage bin and a heat medium conveying pipeline. The lump ore storage bin is provided with a lump ore feeding hole, a lump ore discharging hole, a heat medium inlet and a heat medium outlet. The lump ore conveying device is connected to the lump ore feed inlet of the lump ore storage bin. The heat medium conveying pipeline is connected to a heat medium inlet of the lump ore storage bin. And a distributed blanking device is arranged in the lump ore storage bin.

Generally, the lump ore feed inlet is disposed at the top of the lump ore storage bin. The lump ore discharge port is arranged at the bottom of the lump ore storage bin.

The utility model discloses in, the distribution unloader sets up on the lateral wall of lump ore storage silo. The distribution blanking device comprises an upper material distributing plate and a lower material distributing plate. The one end of the flitch of upper portion and the one end of the flitch of lower part are connected with the lateral wall of lump ore storage silo respectively, and the flitch setting of upper portion is in the top of the flitch of lower part, and the flitch downward sloping setting of upper portion, and the flitch tilt up setting of lower part down, and the other end of the flitch of upper portion and the other end of the flitch of lower part extend to the offside that distributes unloader and lump ore storage silo hookup location respectively.

The opposite side of the connecting position of the distributed blanking device and the lump ore storage bin refers to one side of the lump ore storage bin, which is deviated from the distributed blanking device, or the side opposite to the setting position of the distributed blanking device.

Preferably, the other end of the upper part flitch and the other end interconnect of lower part flitch, preferably swing joint, the lateral wall three of upper part flitch, lower part flitch and lump ore storage silo constitutes the triangle-shaped structure on vertical cross-section promptly. A gap is reserved between a triangular top formed by connecting the other end of the upper part material plate and the other end of the lower part material plate and the side wall of the lump ore storage bin. Preferably, the gap is greater than 5mm, preferably greater than 6mm, more preferably greater than 8 mm.

Here, a gap is left between a triangular vertex formed by connecting the other end of the upper part material plate and the other end of the lower part material plate and a side wall of the lump ore storage bin, wherein the side wall of the lump ore storage bin is the side wall opposite to the connecting position of the distributed blanking device and the lump ore storage bin.

Preferably, 1-20 layers of distributed blanking devices are arranged in the lump ore storage bin from top to bottom, 2-10 layers of distributed blanking devices are preferably arranged, and 3-8 layers of distributed blanking devices are more preferably arranged. Preferably, the two adjacent layers of the distribution blanking devices are arranged oppositely in the horizontal direction. And upper material plates of all the distributed blanking devices are sequentially distributed to form a 'Z' -shaped ore blanking channel.

The two adjacent layers of the distributed blanking devices are arranged oppositely in the horizontal direction, and the two adjacent layers of the distributed blanking devices are arranged oppositely in a boundary manner in a multilayer distributed blanking device arranged from top to bottom in the lump ore storage bin. For example, as shown in fig. 2, first 3 layers of distributed blanking devices are arranged in the lump ore storage bin from top to bottom in the vertical direction, then in the horizontal direction, a first layer of distributed blanking devices is arranged on the left side of the inner wall of the lump ore storage bin shown in the figure, a second layer of distributed blanking devices is arranged on the right side of the inner wall of the lump ore storage bin shown in the figure, and a third layer of distributed blanking devices is arranged on the left side of the inner wall of the lump ore storage bin shown in the figure again, namely, the multiple layers of distributed blanking devices are arranged at intervals in the lump ore storage bin. The utility model discloses in, the lateral wall three of the upper portion flitch of distribution unloader, lower part flitch and lump ore storage silo constitutes the triangle-shaped structure on vertical cross-section, nevertheless the respective shape of upper portion flitch and lower part flitch does not do specifically and prescribes a limit to, can satisfy the lump ore storage silo to the lump ore go on sieve with the requirement of drying can.

Preferably, the upper part material plate of each layer of the distributed blanking device is provided with a sieve hole. Preferably, each layer of distribution blanking device is provided with a powder discharge opening. The powder discharge port is arranged on the side wall of the lump ore storage bin and is connected with the lower material plate of the distributed blanking device. And a powder blanking channel is formed in a gap between the upper part material distributing plate and the lower part material distributing plate of each layer of the distributed blanking device.

Preferably, the size of the sieve holes is 5-20 mm, preferably 6-15 mm, and more preferably 7-10 mm.

The utility model discloses in, top-down is equipped with material distribution room, heat exchange chamber and material collection room in the lump ore storage silo. The distribution blanking device is arranged in a heat exchange chamber in the middle of the lump ore storage bin. The lump ore feed inlet of the lump ore storage bin is arranged on the material distribution chamber, and the lump ore discharge outlet is arranged on the material collection chamber. Lump ore enters the material distribution chamber from the lump ore feed inlet, and then passes through a Z-shaped lump ore blanking channel of the distribution blanking device to enter the material collection chamber. The hot medium inlet of the lump ore storage bin is arranged on the material collecting chamber, and the hot medium outlet is arranged on the material distributing chamber. The heat medium enters the lump ore storage bin from a heat medium inlet on the material collection chamber, directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel to be discharged from a heat medium outlet on the material distribution chamber.

The utility model discloses in, top-down is equipped with material distribution room, heat exchange chamber and material collection room in the lump ore storage silo. The distribution blanking device is arranged in a heat exchange chamber in the middle of the lump ore storage bin. The lump ore feed inlet of the lump ore storage bin is arranged on the material distribution chamber, and the lump ore discharge outlet is arranged on the material collection chamber. Lump ore enters the material distribution chamber from the lump ore feed inlet, and then passes through a Z-shaped lump ore blanking channel of the distribution blanking device to enter the material collection chamber. Meanwhile, powder attached to the lump ore enters the powder blanking channel through the sieve holes on the upper part material plate of each layer of the distributed blanking device and is then discharged from the powder discharge ports of each layer. The hot medium inlet of the lump ore storage bin is arranged on the material collecting chamber, and the hot medium outlet is arranged on the material distributing chamber. The heat medium enters the lump ore storage bin from a heat medium inlet on the material collection chamber, directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel to be discharged from a heat medium outlet on the material distribution chamber.

The utility model discloses in, top-down is equipped with material distribution room, heat exchange chamber and material collection room in the lump ore storage silo. The distribution blanking device is arranged in a heat exchange chamber in the middle of the lump ore storage bin. The lump ore feed inlet of the lump ore storage bin is arranged on the material distribution chamber, and the lump ore discharge outlet is arranged on the material collection chamber. Lump ore enters the material distribution chamber from the lump ore feed inlet, and then passes through a Z-shaped lump ore blanking channel of the distribution blanking device to enter the material collection chamber. Meanwhile, powder attached to the lump ore enters the powder blanking channel through the sieve holes on the upper part material plate of each layer of the distributed blanking device and is then discharged from the powder discharge ports of each layer. The material collection chamber is provided with a heat medium inlet, each layer of distributed blanking device is provided with a heat medium outlet, and the heat medium outlet is positioned on the side wall of the lump ore storage bin between the upper part material plate and the lower part material plate of each layer of distributed blanking device. Preferably, the heat medium outlet coincides with the powder discharge port. The heat medium enters the lump ore storage bin from a heat medium inlet on the material collecting chamber, directly contacts with the lump ore to exchange heat, upwards passes through the 'Z' -shaped lump ore blanking channel, and is discharged through a heat medium outlet on each layer of distribution blanking device.

Preferably, the system further comprises a thermal medium flow guide device. The heat medium flow guiding device is arranged in the material collecting chamber, and a heat medium flow guiding inlet and a heat medium flow guiding outlet are formed in the heat medium flow guiding device. And a heat medium inlet of the lump ore storage bin is communicated with a heat medium diversion inlet. Preferably, 1-20 heat medium diversion devices, preferably 2-5 heat medium diversion devices are arranged in the material collection chamber. And the heat medium diversion inlets of all the heat medium diversion devices are communicated with the heat medium inlet.

Preferably, the distribution blanking device is further provided with an angle adjusting device. The angle adjusting device is arranged on the side wall of the lump ore storage bin and is connected with an upper part material plate of the distribution blanking device. The angle adjusting device is used for adjusting an included angle between an upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin.

The utility model discloses in, lump ore feed inlet department on the lump ore storage silo is equipped with first moisture detection device, material flow detection device and material temperature detection device.

The utility model discloses in, the lump ore discharge gate department of lump ore storage silo is equipped with second moisture detection device.

Preferably, the system further comprises a blast furnace. And a lump ore discharge port of the lump ore storage bin is connected with a feed port of the blast furnace.

Preferably, the system further comprises a dust removal system, and the heat medium outlet is communicated to the dust removal system through a heat medium discharge pipeline.

According to the utility model discloses a second embodiment provides a lump ore screening and integrative preliminary treatment method of drying.

A method of screening and drying a lump ore into a pre-treatment or a pre-treatment using the system of the first embodiment, the method comprising the steps of:

1) conveying the lump ore to be treated to a lump ore storage bin, and introducing a heat medium into the lump ore storage bin.

2) The lump ore enters a 'Z' -shaped lump ore blanking channel of the distribution blanking device and is uniformly contacted with a heat medium from bottom to top to carry out gas-solid heat exchange, so that dry lump ore is obtained.

According to the utility model discloses a third embodiment provides a lump ore screening and integrative preliminary treatment method of drying.

2) The lump ore enters a 'Z' -shaped ore blanking channel of the distribution blanking device and is uniformly contacted with a heat medium from bottom to top to perform gas-solid heat exchange. Meanwhile, powder attached to the lump ore enters the powder blanking channel through the sieve holes on the upper part material plate of each layer of the distributed blanking device and is then discharged from the powder discharge ports of each layer. Thereby obtaining the dried large-particle-size lump ore.

Preferably, the method further comprises the steps of:

a) before the lump ore to be processed is conveyed to the lump ore storage bin, the lump ore storage bin is subjected to furnace baking treatment by adopting a heat medium, and the lump ore storage bin is preheated by the heat medium.

Preferably, the method further comprises the steps of:

3) and after heat exchange is carried out between the heat medium and the lump ore in the lump ore storage bin, the heat medium is discharged from the lump ore storage bin, and the discharged heat medium is conveyed to the dust removal system.

4) And conveying the dried large-particle-size lump ore obtained after drying and screening treatment to a blast furnace.

Preferably, a first moisture detection device, a material flow detection device and a material temperature detection device are arranged at a lump ore feed inlet of the lump ore storage bin. The first moisture detection device detects the moisture content in the lump ore entering the lump ore storage bin and marks as W₀% of the amount of the compound (b). The material flow detection device detects the lump ore amount entering the lump ore storage bin in unit time and marks as M₀，m³. Material temperature detection device detectsThe temperature of the lump ore entering the lump ore storage bin is marked as T₀At deg.C. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnace_max% of the amount of the compound (b). Calculating the flow V, m of the heat medium conveyed to the lump ore storage bin in unit time³；

Wherein: c_{Article (A)}Is the specific heat capacity of the lump ore, C_MediumIs the specific heat capacity of the thermal medium. Rho_{Article (A)}Bulk density of lump ore, p_MediumIs the density of the thermal medium. And T is the temperature of the heat medium when the heat medium is input into the lump ore storage bin.

Conveying a heat medium with the flow not less than V to a lump ore storage bin in unit time, and drying the lump ore in the lump ore storage bin by the heat medium to ensure that the moisture content of the lump ore is lower than W before entering the blast furnace_max。

Preferably, a first moisture detecting device is arranged at the lump ore feed inlet of the lump ore storage bin, and the initial airflow speed of the heat medium conveyed to the lump ore storage bin is set to be S₀M/s. The first moisture detection device detects the moisture content in the lump ore entering the lump ore storage bin and records as x₁. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnace_max% of the amount of the compound (b). Judgment of x₁And W_maxAdjusting the real-time air velocity S of the thermal medium delivered to the lump ore storage bin₁M/s. The method comprises the following steps:

when x is₁When the content is more than or equal to 10 percent, S₁＝[1+k₁·(x₁-10％)]×S₀。

When 6% < x₁When less than 10%, S₁＝S₀。

When W is_max＜x₁When the content is less than or equal to 6 percent, S₁＝[1-k₂·(6％-x₁)]×S₀。

When x is₁≤W_maxAnd stopping conveying the heat medium into the lump ore storage bin.

Wherein k is₁、k₂For the coefficient of flow regulation, k₁Has a value range of 3-5, k₂The value range of (A) is 1 to 3. W_max≤4％。

Real-time detection of x₁The real-time air flow speed of the heat medium conveyed to the lump ore storage bin is adjusted to be S₁Drying the lump ore by the heat medium in the lump ore storage bin to ensure that the water content of the lump ore is lower than W before entering the blast furnace_max。

Preferably, a first moisture detection device is arranged at the lump ore feeding port of the lump ore storage bin, and an initial included angle between an upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin is set to be theta₀And (c) degree. The first moisture detection device detects the moisture content in the lump ore entering the lump ore storage bin and records as x₁. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnace_max% of the amount of the compound (b). Judgment of x₁And W_maxThe real-time included angle theta between the upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin is adjusted₁And (c) degree. The method comprises the following steps:

when x is₁When not less than 10%, theta₁＝[1+k₅·(x₁-10％)]×θ₀。

When 6% < x₁At < 10%, theta₁＝θ₀。

When W is_max＜x₁When the content is less than or equal to 6 percent, theta₁＝[1-k₆·(6％-x₁)]×θ₀。

Wherein k is₅、k₆Is an angle adjustment coefficient, k₅Has a value range of 3-8, k₆The value range of (A) is 1 to 5. W_max≤4％。

Real-time detection of x₁The real-time included angle between an upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin is adjusted to be theta₁The heat medium is used for drying the lump ore in the lump ore storage bin so as to enable the lump ore to enter the blast furnaceThe water content of the ore is lower than Wmax.

Preferably, a second moisture detecting device is provided at the lump ore discharge port of the lump ore storage bin, and the initial air velocity S of the heat medium conveyed to the lump ore storage bin is set₀M/s. The second moisture detection device detects the moisture content in the lump ore of the discharged lump ore storage bin, and the moisture content is marked as x₂. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnace_max% of the amount of the compound (b). Judgment of x₂And W_maxAdjusting the real-time air velocity S of the thermal medium delivered to the lump ore storage bin₂M/s. The method comprises the following steps:

when x is₂≥W_maxWhen S is present₂＝[1+k₃·(x₂-W_max)]×S₀。

When 50% W_max＜x₂＜W_maxWhen S is present₁＝S₀。

When x is₂≤50％W_maxWhen the temperature of the water is higher than the set temperature,

wherein k is₃、k₄For the coefficient of flow regulation, k₃Has a value range of 1-3, k₄The value range of (A) is 0.5-2. W_max＜6％。

Real-time detection of x₂The real-time air flow speed of the heat medium conveyed to the lump ore storage bin is adjusted to be S₂Drying the lump ore by the heat medium in the lump ore storage bin to ensure that the water content of the lump ore is lower than W before entering the blast furnace_max。

Preferably, a second moisture detection device is arranged at the lump ore discharge port of the lump ore storage bin, and an initial included angle between an upper part material plate of the distributed discharging device and the side wall of the lump ore storage bin is set to be theta₀And (c) degree. The second moisture detection device detects the moisture content in the lump ore of the discharged lump ore storage bin, and the moisture content is marked as x₂. Setting the upper limit of the water content of the lump ore entering the blast furnace as W according to the condition requirements of the blast furnace_max% of the amount of the compound (b). Judgment of x₂And W_maxThe real-time included angle theta between the upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin is adjusted₂And (c) degree. The method comprises the following steps:

when x is₂≥W_maxWhen theta is greater than theta₂＝[1+k₇·(x₂-W_max)]×θ₀。

When 50% W_max＜x₂＜W_maxWhen theta is greater than theta₂＝θ₀。

When x is₂≤50％W_maxWhen theta is greater than theta₂＝[1-k₈·(0.5W_max-x₂)]×θ₀。

Wherein k is₇、k₈Is an angle adjustment coefficient, k₇Has a value range of 3-5, k₈The value range of (A) is 1 to 3. W_max＜6％。

Real-time detection of x₂The real-time included angle between an upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin is adjusted to be theta₂And drying the lump ore by the heat medium in the lump ore storage bin, so that the water content of the lump ore is lower than Wmax before entering the blast furnace.

In the utility model, the heat medium is a heat source generated by the steel process. Preferably, the heat medium is a heat source released by combustion of sintering circular cooler hot exhaust gas, blast furnace hot blast stove exhaust gas, coke oven gas/blast furnace gas/converter gas, and is preferably sintering circular cooler hot exhaust gas or blast furnace hot blast stove exhaust gas.

In the utility model discloses in, the temperature that the hot medium got into lump ore storage silo is greater than 100 ℃, preferably is greater than 150 ℃.

The utility model discloses in, the air velocity that the hot medium got into lump ore storage silo is 0.01 ~ 3m/s, preferably is 0.02 ~ 1m/s, more preferably is 0.03 ~ 0.5 m/s.

The utility model discloses in, the contained angle that distributes between unloader's upper portion flitch and lump ore storage silo's the lateral wall is 10 ~ 85, preferably 20 ~ 80.

The utility model discloses in, the dwell time of lump ore in the lump ore storage silo is 0.5 ~ 24h, preferably 1 ~ 12h, more preferably 2 ~ 8 h.

In the present invention, the particle size of the large-particle-size lump ore is greater than 5mm, preferably greater than 6mm, and more preferably greater than 8 mm.

The utility model provides a screening and integrated lump ore pretreatment systems and method of drying. The utility model discloses to the powder that natural lump ore exists and the high difficult problem of moisture content, provided and directly adopted the lump ore storage silo to sieve and dry pretreatment system and method. The lump ore is pretreated by drying and screening in a lump ore storage bin, the moisture of the lump ore is removed, and fine materials are screened, and a heat source required by drying is preferably hot waste gas (such as hot waste gas generated by a blast furnace) from a steel mill. The utility model provides a pretreatment methods is simple and easy, practical, reliable, does benefit to the engineering and popularizes and applies, compares with the dry flow process technology of traditional drum, the utility model discloses a lump ore storage silo carries out the preprocessing technique of drying and screening, because the lump ore storage silo is a confined environment relatively, and the moisture desorption of lump ore is efficient, has solved the lump ore and has gone into stove (blast furnace) a difficult problem. And simultaneously, pretreatment methods still realized the multistage screening to the lump ore through the distribution unloader who sets up in the lump ore storage silo, will adhere to the powder screening on the lump ore, improved blast furnace lump ore and gone into stove proportion and gas permeability level, effectively reduced blast furnace manufacturing cost, improved the blast furnace level of going forward. The popularization of the utility model has good economic, social and environmental benefits, and is expected to open up a more stable and efficient way for the development of the lump ore pretreatment process in China.

Researches show that drying treatment of lump ore in a storage bin by using hot waste gas in a steel process is feasible, so that moisture of charged lump ore can be effectively reduced, energy consumption required by drying can be greatly reduced, and the charging proportion of the dried lump ore can be improved to a certain extent, so that the smelting cost of a blast furnace is reduced.

However, the lump ore is not uniformly contacted with the heat medium in the lump ore storage bin, the lump ore exists in the storage bin in a stacking state, especially the existence of fine-grained materials, so that the whole material air permeability of the lump ore storage bin is deviated, the hot air flow cannot smoothly penetrate through a material body, the drying effect is poor, and the upper temperature of the lump ore storage bin is lower than the dew point temperature of water, so that the water vapor is easily condensed, and the dust removal system is damaged. Meanwhile, in the prior art, the screening and drying pretreatment of the lump ore are basically performed separately by different devices, thereby increasing the cost of the lump ore pretreatment. From this, the utility model discloses a to the shortcoming that the lump ore deposit screening exists with the stoving in the storage silo, provide a lump ore deposit pretreatment systems of screening and stoving integration. The utility model discloses set up the distribution unloader who constitutes by upper portion flitch and lower part flitch in lump ore storage silo, multilayer distribution unloader top-down divides limit interval arrangement, all distribution unloader's upper portion flitch is arranged in proper order and is formed "Z" shape piece ore deposit unloading passageway. Lump ore enters the material distribution chamber from the lump ore feed inlet and then enters the material collection chamber through the Z-shaped lump ore blanking channel. The heat medium inlet is arranged on the material collecting chamber. The heat medium outlet is arranged on the material distribution chamber. The heat medium enters the lump ore storage bin from the heat medium inlet on the material collecting chamber, directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel to be discharged from the heat medium outlet on the material distribution chamber, so that the heat exchange between gas and solid is enhanced. The air flow enters the bin from the lower part of the lump ore storage bin and is discharged to the dust removal system from the upper part, the whole lump ore storage bin is full of hot air flow, the contact effect of the hot air flow and the lump ore is improved, the air permeability of the bin body is improved, and the drying effect is enhanced.

As preferred, the utility model discloses in set up the multilayer distribution unloader in lump ore storage silo heat exchange chamber, wherein all be equipped with the sieve mesh on every layer of distribution unloader's the upper portion flitch, every layer of distribution unloader's upper portion flitch can both play screening plant's effect promptly. The connection part of the lower part material plate of each layer of distribution blanking device and the side wall of the lump ore storage bin is provided with a powder discharge port which is equivalent to a material outlet under a sieve of the sieving device. Therefore, a powder blanking channel is formed in a gap between the upper part material plate and the lower part material plate of each layer of the distributed blanking device, and the powder blanking channel is equivalent to an undersize material channel of the screening device. The lump ore enters the lump ore storage bin, and in the process of passing through the Z-shaped lump ore blanking channel, powder attached to the lump ore enters the powder blanking channel through sieve holes on the upper part material plates of the distributed blanking devices of each layer and is discharged through the powder discharge ports. In the scheme, on one hand, the arrangement of the plurality of layers of distributed blanking devices in the lump ore storage bin prolongs the contact time of the heat medium and the lump ore, the contact is more uniform, the contact effect is better, the heat exchange between the heat medium and the lump ore is enhanced, and the drying effect is enhanced; on the other hand, when the drying effect of lump ore in the lump ore storage bin is improved, the multistage screening of the lump ore is realized through the arrangement of the sieve pores and the powder discharge openings on the discharging devices distributed on all layers, namely, the powder attached to the lump ore is removed while the drying quality is ensured, and the integration of screening and drying is really realized. Generally speaking, the screening efficiency of lump ore after drying is higher, and the grading effect is better, and the lump ore after the screening is dried again, and its stoving effect also can be better, that is to say the utility model discloses in, the lump ore is sieved and is gone on simultaneously with the stoving process on the distribution unloader of lump ore storage silo, and screening and stoving can play the promotion each other, and on the basis that single process was handled, the effect of screening and stoving is further strengthened. Furthermore, the utility model discloses a each layer distributes unloader all is equipped with the powder bin outlet, can in time discharge the powder of screening out, and then reduces dry cost, the energy saving. In this scheme, the size of sieve mesh is generally 5 ~ 20mm, preferably 6 ~ 15mm, more preferably 7 ~ 10mm, and the concrete size of sieve mesh can be adjusted as required according to operating condition. The sieve pores on the distributed blanking devices of each layer can also be set to be different sizes according to requirements, for example, the sieve pores of the distributed blanking devices of the upper layer can be larger than the sieve pores of the distributed blanking devices of the lower layer in consideration of the difference of the moisture content and the viscosity of the lump ore at different positions, so that the step screening of the lump ore is realized. In addition, each layer distributes unloader's sieve mesh size to some extent and distinguishes, can be so that the powder of different granularities is preferential to be discharged from the sieve mesh of difference, avoids the granule to compete mutually and gets into the sieve mesh and lead to the problem that screening efficiency is low.

Preferably, the heat medium outlet of the present invention may not be provided in the material distribution chamber. The hot medium outlet is arranged on the side wall of the lump ore storage bin between the upper part material distributing plate and the lower part material distributing plate of the distributing and blanking device. Each layer of the distributed blanking device is provided with a heat medium outlet. The heat medium enters the lump ore storage bin from a heat medium inlet on the material collecting chamber, directly contacts with the lump ore to exchange heat, upwards passes through the 'Z' -shaped lump ore blanking channel, and is discharged through a heat medium outlet on each layer of distribution blanking device. Can set up an updraft ventilator respectively in each layer hot medium exit, also can set up a total exhaust system, this exhaust system passes through pipeline and each layer hot medium export intercommunication. The hot medium enters the lump ore storage bin, and after directly contacting and exchanging heat with the lump ore, the air draft system extracts the hot medium from each layer of hot medium outlets. When the heat medium uniformly distributed on each layer of distribution blanking device is drawn out, the heat medium can pass through the sieve pores on the upper part material plate of the layer of distribution blanking device, enters the powder discharge channel and is then discharged through the heat medium outlet. In this scheme, hot medium can pass through the sieve mesh at the exhaust in-process, and the air current passes from the sieve mesh, is favorable to bringing the powder attached to on the lump ore into the powder discharge passage under the sieve mesh, and then strengthens the screening effect of distribution unloader to the lump ore, and the gas permeability of whole lump ore storage silo is greatly improved, promotes screening and stoving effect from this. Further preferably, the heat medium outlet of each layer of distribution blanking device may coincide with the position of the powder discharge opening. The heat medium outlet is arranged at the powder discharge port, and in the process of heat medium discharge, the heat medium can also play a role in drainage, so that screened fine powder materials are taken out of the lump ore storage bin together, and the energy consumption of the system is reduced.

The utility model discloses in, after the sieve mesh on each layer distribution unloader's the upper portion flitch of lump ore process realized multi-stage screening, its undersize thing can be carried to sintering feed proportioning system, and the undersize thing gets into the sintering process.

Preferably, the system further comprises a thermal medium flow guide device. The heat medium flow guide device is arranged in the lump ore storage bin, so that the heat medium is uniformly distributed in the lump ore storage bin, the heat medium is more fully contacted with the lump ore, and the moisture content in the lump ore is more effectively reduced. The lump ore is fully contacted with the heat medium, the drying effect of the lump ore is improved, and the moisture content in the lump ore before entering the blast furnace meets the requirement, so that the energy consumption of the blast furnace is reduced, the normal operation of blast furnace procedures is ensured, the quality of blast furnace products is improved, and the production cost is saved. The heat medium flow guiding device can adopt a structure of one (or a plurality of) heat medium flow guiding inlets and a plurality of heat medium flow guiding outlets, so that the dispersity of the heat medium is improved.

In the present invention, the heat medium may be hot exhaust gas with a high temperature or hot air after heat treatment. Generally, the temperature of the heat medium is higher than 100 ℃.

The utility model discloses in, utilize the lump ore storage silo as the place and the device to lump ore screening and drying process, make full use of current equipment resource realizes the screening and the dehydration process of lump ore, need not additionally to increase new equipment. Only a heat medium inlet and a heat medium outlet are required to be arranged on the original lump ore storage bin.

The utility model discloses in, to the moisture content in the lump ore high, as the problem that blast furnace raw materials addition is low on the low side, adopt the lump ore storage silo to sieve and dry preliminary treatment the lump ore, through carrying hot medium in to the lump ore storage silo. In the lump ore storage bin, the heat medium dries the lump ore, evaporates and takes away water in the lump ore, and the heat medium after heat exchange is discharged out of the lump ore storage bin together, so that the aim of drying the lump ore is fulfilled.

Preferably, after the heat medium exchanges heat with the lump ore in the lump ore storage bin, the heat medium takes away the moisture in the lump ore, and meanwhile, the heat medium can remove dust on the surface of the lump ore, so that the content of the dust in the lump ore storage bin is reduced, the air permeability of the heat medium in the lump ore storage bin is increased, and the drying efficiency is improved. Preferably, the heat medium discharged from the lump ore storage bin is subjected to dust removal treatment by a dust removal system, so that the pollution of the discharged heat medium to the environment is reduced. Meanwhile, the dust particles collected by the dust removal system can be used as sintering raw materials, and resource recycling is realized.

Preferably, the lump ore is dried in the lump ore storage bin and is screened, after the lump ore is screened according to the particle size or the particle diameter through the sieve pores on the upper part material plates of the distribution blanking devices of each layer, the dried large-particle-diameter lump ore on the sieve (namely on the upper part material plates) meeting the particle diameter requirement is conveyed to the blast furnace through the conveying device. Through the screening process, the powder materials screened by the blanking devices distributed on each layer can be discharged out of the lump ore storage bin through the powder discharge port in time, so that the drying treatment capacity is reduced, the drying energy consumption and the production cost are reduced, the air permeability in the lump ore storage bin is improved, and the drying effect of a hot medium on the lump ore is further improved.

The utility model discloses in, will carry the blast furnace through the dry big particle diameter lump ore that obtains after screening and drying process, guaranteed the particle size who gets into the blast furnace raw materials to guarantee the smelting effect of blast furnace.

Preferably, before the lump ore to be processed is conveyed to the lump ore storage bin, the lump ore storage bin is preheated by the heat medium, so that the internal temperature of the lump ore storage bin is increased, when the lump ore with high moisture content enters the lump ore storage bin, moisture is condensed, and the drying effect of the lump ore in the lump ore storage bin is further improved.

The utility model also provides an air velocity control method for lump ore screening and stoving integration pretreatment systems, this method carries out reasonable adjustment to the hot medium flow or the velocity of flow that get into in the lump ore storage silo according to the moisture detection data of lump ore feed inlet and lump ore discharge gate department, and then guarantees to get into the moisture content of the lump ore in the blast furnace and satisfies the demands. The method includes the following 3 embodiments.

In the first embodiment, a first moisture detection device, a material flow detection device and a material temperature detection device are arranged at the position of a material feeding hole of the lump ore storage bin, the first moisture detection device detects the moisture content in the lump ore entering the lump ore storage bin, the material flow detection device detects the lump ore amount entering the lump ore storage bin in unit time, the material temperature detection device detects the temperature of the lump ore entering the lump ore storage bin, and the upper limit of the water content of the lump ore entering the blast furnace is set to be W_max% of the amount of the compound (b). The flow of the heat medium conveyed to the lump ore storage bin in unit time can be accurately known through calculation, so that the moisture content of the lump ore before entering the blast furnace is lower than W_max。

In a second embodiment, a first moisture detecting device is provided at the lump ore feed port of the lump ore storage bin, an initial airflow velocity of the heat medium conveyed to the lump ore storage bin is set, the first moisture detecting device detects a moisture content in the lump ore entering the lump ore storage bin, and an upper limit of the moisture content of the lump ore entering the blast furnace is set to W_max% of the amount of the compound (b). The detected water content in the lump ore at the lump ore feed inlet is compared with the upper limit of the water content of the lump ore entering the blast furnace, and the real-time air flow speed of the heat medium conveyed to the lump ore storage bin is adjusted, so that the water content of the lump ore before entering the blast furnace is lower than W_max。

In a third embodiment, a second moisture detecting device is provided at the lump ore discharging port of the lump ore storage bin, the initial air velocity of the heat medium supplied to the lump ore storage bin is set, the second moisture detecting device detects the moisture content in the lump ore discharged from the lump ore storage bin, and the upper limit of the moisture content of the lump ore charged into the blast furnace is set to be W_maxComparing the detected water content in the lump ore at the discharge port with the upper limit of the water content of the lump ore entering the blast furnace, and adjusting the real-time air flow speed of the heat medium conveyed to the lump ore storage bin, thereby ensuring that the water content of the lump ore before entering the blast furnace is lower than W_max。

The utility model also provides a distribution unloader contained angle control method for lump ore screening and stoving integration pretreatment systems, this method is according to the moisture detection data of lump ore feed inlet and lump ore discharge gate department, carries out reasonable adjustment through setting up the contained angle between the upper portion flitch of the distribution unloader in upper portion flitch and the lump ore storage silo lateral wall of angle adjusting device of upper portion flitch and lump ore storage silo lateral wall junction, and then guarantees to get into the moisture content of lump ore in the blast furnace and meet the demands. The method includes the following 2 embodiments.

In a fourth embodiment, a first moisture detection device is arranged at the lump ore feed inlet of the lump ore storage bin, an initial included angle between an upper part material plate of the distributed blanking device and the side wall of the lump ore storage bin is set, and the first moisture detection device detects the lump ore entering the lump ore storage binThe upper limit of the water content of the lump ore entering the blast furnace is set to W_max% of the amount of the compound (b). Comparing the detected water content in the lump ore at the lump ore feed inlet with the upper limit of the water content of the lump ore entering the blast furnace, and adjusting the real-time included angle between an upper part material plate of the distribution blanking device and the side wall of the lump ore storage bin, thereby ensuring that the water content of the lump ore before entering the blast furnace is lower than W_max。

In a fifth embodiment, a second moisture detection device is arranged at the lump ore discharge port of the lump ore storage bin, an initial included angle between an upper part material plate of the distributed discharging device and the side wall of the lump ore storage bin is set, the second moisture detection device detects the moisture content in the lump ore discharged from the lump ore storage bin, and the upper limit of the moisture content of the lump ore entering the blast furnace is set to be W_maxComparing the detected water content in the lump ore at the discharge port with the upper limit of the water content of the lump ore entering the blast furnace, and adjusting the real-time included angle between the upper part material plate of the distributed discharging device and the side wall of the lump ore storage bin, thereby ensuring that the water content of the lump ore before entering the blast furnace is lower than W_max。

Adopt the technical scheme provided by the utility model, can increase the interpolation proportion of lump ore in the blast furnace raw materials, through the experiment, adopt the utility model discloses a technical scheme, its addition can reach 30% at most. Greatly increases the dosage ratio of the lump ore in the blast furnace process, thereby reducing the operation cost of the blast furnace.

In the present invention, the height of the lump ore storage silo is 3-100m, preferably 5-80m, more preferably 10-50 m.

In the structure of the lump ore storage bin of the utility model, the height ratio of the material distribution chamber, the heat exchange chamber and the material collection chamber is 1:0.1-50:0.5-10, preferably 1:1-20: 1-5.

In the utility model, the ratio of the height of the heat exchange chamber to the length of the distribution blanking device is 1:0.2-1, preferably 1:0.5-0.9, and more preferably 1: 0.6-0.8.

Compared with the prior art, the technical scheme of the utility model following beneficial technological effect has:

1. the utility model discloses a lump ore storage silo carries out dry preliminary treatment to lump ore, through carrying the hot medium to lump ore storage silo, in lump ore storage silo, the hot medium carries out the drying to lump ore, with the evaporation of water in the lump ore, take away, along with the hot medium after the heat transfer discharge lump ore storage silo together, reaches the purpose of dry lump ore.

2. To the shortcoming that lump ore deposit screening and stoving exist in the storage silo, the utility model discloses set up the unloader that distributes in the lump ore storage silo, multilayer distribution unloader top-down divides limit interval arrangement, all distribution unloader's upper portion flitch is arranged in proper order and is formed "Z" shape piece ore deposit unloading passageway, upper portion flitch and lump ore deposit direct contact and be provided with the sieve mesh. The arrangement of the feeding channel of the Z-shaped lump ore ensures that the lump ore is in a rolling state in the storage bin, and the lump ore is screened in multiple stages through each layer of sieve pores in the rolling and falling process, so that the air permeability of the whole bin body is greatly improved; in addition, the contact time of the lump ore and the heat medium is prolonged, the heat exchange effect of the heat medium and the lump ore is improved, and the screening and drying effects of the lump ore are enhanced.

3. The utility model integrates the screening and drying of the lump ore, improves the air permeability of the material layer in the lump ore storage bin after synchronous screening, and is beneficial to improving the drying efficiency; correspondingly, the fluidity of the materials after synchronous drying is improved, and the screening efficiency is improved; therefore, mutual promotion is realized, and the screening efficiency and the drying efficiency are improved.

4. The utility model discloses an among the preferred scheme, every layer of unloader that distributes all is equipped with the heat medium export, heat medium export and powder bin outlet coincidence. In this scheme, hot medium can pass through the sieve mesh at exhaust in-process, and the air current passes from the sieve mesh, is favorable to bringing the powder attached to on the lump ore into the powder discharge passageway under the sieve mesh, and then the reinforcing distributes the screening effect of unloader to the lump ore, and the gas permeability of whole lump ore storage silo is greatly improved, promotes screening and stoving effect from this. The heat medium outlet is arranged at the powder discharge port, and in the process of heat medium discharge, the heat medium can also play a role in drainage, so that screened fine powder materials are taken out of the lump ore storage bin together, and the energy consumption of the system is reduced.

5. The utility model discloses a system simple and easy, practical, reliable, the abundant characteristics of make full use of steel mill hot waste gas resource effectively reduce lump ore preliminary treatment cost, solve the lump ore and go into a stove and add the difficult problem that the rate is low, improved the lump ore of blast furnace and gone into stove proportion and gas permeability level, effectively reduced blast furnace manufacturing cost, improved the blast furnace level of going forward.

Drawings

FIG. 1 is a schematic structural view of a pretreatment system for lump ore screening and drying;

FIG. 2 is a schematic structural view of a distribution blanking device in the pretreatment system of the present invention;

fig. 3 is a schematic structural view of the middle distribution blanking device provided with a 'Z' -shaped block ore blanking channel;

FIG. 4 is a schematic structural view of the powder discharging passage of the middle distribution discharging device of the present invention;

FIG. 5 is a schematic structural view of the distribution blanking device in the pretreatment system of the present invention, on which the thermal medium outlet is provided;

FIG. 6 is a schematic structural view of a lump ore storage bin provided with a thermal medium diversion device and a detection device in the pretreatment system of the present invention;

FIG. 7 is a schematic structural view of the heat medium diversion device in the pretreatment system of the present invention.

Reference numerals:

1: a lump ore storage bin; 101: a lump ore feed inlet; 102: discharging a lump ore; 103: a heat medium inlet; 104: a thermal medium outlet; 105: a material distribution chamber; 106: a heat exchange chamber; 107: a material collection chamber; 108: a thermal medium flow guide device; 10801: a heat medium diversion inlet; 10802: a heat medium diversion outlet; 2: distributing blanking devices; 201: an upper part plate; 20101: screening holes; 202: a lower material distributing plate; 203: a powder discharge opening; 204: an angle adjusting device; 3: a first moisture detection device; 4: a material flow rate detection device; 5: a material temperature detection device; 6: a second moisture detection device; 7: a blast furnace; 8: a dust removal system; a1: a Z-shaped ore blanking channel; a2: a powder blanking channel; d1: a lump ore conveying device; l1: a thermal medium delivery conduit; l2: the heat medium is discharged out of the pipe.

Detailed Description

The technical solution of the present invention is illustrated below, and the claimed invention includes but is not limited to the following embodiments.

A lump ore screening and drying integrated pretreatment system comprises a lump ore conveying device D1, a lump ore storage bin 1 and a heat medium conveying pipeline L1. The lump ore storage bin 1 is provided with a lump ore feeding port 101, a lump ore discharging port 102, a heat medium inlet 103 and a heat medium outlet 104. The lump ore conveyor D1 is connected to the lump ore feed opening 101 of the lump ore storage bin 1. The heat medium delivery pipe L1 is connected to the heat medium inlet 103 of the lump ore storage bin 1. The lump ore storage bin 1 is internally provided with a distributed blanking device 2.

The utility model discloses in, distribution unloader 2 sets up on the lateral wall of lump ore storage silo 1. The distribution blanking device 2 comprises an upper part-material plate 201 and a lower part-material plate 202. One end of the upper material plate 201 and one end of the lower material plate 202 are respectively connected with the side wall of the lump ore storage bin 1, the upper material plate 201 is arranged above the lower material plate 202, the upper material plate 201 inclines downwards, the lower material plate 202 inclines upwards, and the other end of the upper material plate 201 and the other end of the lower material plate 202 extend towards the opposite side of the connecting position of the distribution blanking device 2 and the lump ore storage bin 1 respectively.

Preferably, the other end of the upper material distributing plate 201 and the other end of the lower material distributing plate 202 are connected with each other, preferably movably connected, that is, the upper material distributing plate 201, the lower material distributing plate 202 and the side wall of the lump ore storage bin 1 form a triangular structure on the vertical section. A gap is reserved between the triangular top formed by connecting the other end of the upper material plate 201 and the other end of the lower material plate 202 and the side wall of the lump ore storage bin 1. Preferably, the gap is greater than 5mm, preferably greater than 6mm, more preferably greater than 8 mm.

Preferably, 1-20 layers of the distributed blanking devices 2 are arranged in the lump ore storage bin 1 from top to bottom, 2-10 layers of the distributed blanking devices 2 are preferably arranged, and 3-8 layers of the distributed blanking devices 2 are more preferably arranged. Preferably, two adjacent layers of the distribution blanking devices 2 are arranged oppositely in the horizontal direction. The upper part material plates 201 of all the distribution blanking devices 2 are sequentially arranged to form a Z-shaped ore blanking channel A1.

Preferably, the upper material distributing plate 201 of each layer of the distributed blanking device 2 is provided with a sieve hole 20101. Preferably, each layer of distribution blanking device 2 is provided with a powder discharge opening 203. The powder discharge opening 203 is arranged on the side wall of the lump ore storage bin 1 and is connected with the lower material plate 202 of the distribution blanking device 2. The gap between the upper material distributing plate 201 and the lower material distributing plate 202 of each layer of the distribution blanking device 2 forms a powder blanking channel A2.

Preferably, the size of the sieve holes 20101 is 5-20 mm, preferably 6-15 mm, and more preferably 7-10 mm.

In the utility model discloses in, top-down is equipped with material distribution chamber 105, heat exchange chamber 106 and material in the lump ore storage silo 1 and collects room 107. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. The heat medium inlet 103 of the lump ore storage silo 1 is arranged on the material collection chamber 107, and the heat medium outlet 104 is arranged on the material distribution chamber 105. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collection chamber 107, directly contacts with the lump ore for heat exchange, and then upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged from the heat medium outlet 104 on the material distribution chamber 105.

In the utility model discloses in, top-down is equipped with material distribution chamber 105, heat exchange chamber 106 and material in the lump ore storage silo 1 and collects room 107. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. Meanwhile, the powder attached to the lump ore enters the powder blanking passage a2 through the sieve holes 20101 in the upper part plate 201 of each layer of the distribution blanking device 2, and is then discharged from the powder discharge ports 203 of each layer. The heat medium inlet 103 of the lump ore storage silo 1 is arranged on the material collection chamber 107, and the heat medium outlet 104 is arranged on the material distribution chamber 105. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collection chamber 107, directly contacts with the lump ore for heat exchange, and then upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged from the heat medium outlet 104 on the material distribution chamber 105.

In the utility model discloses in, top-down is equipped with material distribution chamber 105, heat exchange chamber 106 and material in the lump ore storage silo 1 and collects room 107. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. Meanwhile, the powder attached to the lump ore enters the powder blanking passage a2 through the sieve holes 20101 in the upper part plate 201 of each layer of the distribution blanking device 2, and is then discharged from the powder discharge ports 203 of each layer. The material collection chamber 107 is provided with a heat medium inlet 103, each layer of distributed discharging devices 2 is provided with a heat medium outlet 104, and the heat medium outlets 104 are positioned on the side wall of the lump ore storage bin 1 between the upper material plate 201 and the lower material plate 202 of each layer of distributed discharging devices 2. Preferably, the heat medium outlet 104 coincides with the powder discharge opening 203. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collecting chamber 107, directly contacts with the lump ore for heat exchange, upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged through the heat medium outlet 104 on each layer of distribution blanking devices 2.

Preferably, the system further comprises a thermal medium guiding device 108. The heat medium guiding device 108 is arranged in the material collecting chamber 107, and a heat medium guiding inlet 10801 and a heat medium guiding outlet 10802 are arranged on the heat medium guiding device 108. The heat medium inlet 103 of the lump ore storage bin 1 is communicated with the heat medium diversion inlet 10801. Preferably, 1 to 20 of the heat medium guiding devices 108, preferably 2 to 5 of the heat medium guiding devices 108 are arranged in the material collection chamber 107. The heat medium guide inlet 10801 of all the heat medium guide devices 108 is communicated with the heat medium inlet 103.

Preferably, the distribution blanking device 2 is further provided with an angle adjusting device 204. The angle adjusting device 204 is arranged on the side wall of the lump ore storage bin 1 and is connected with the upper part material plate 201 of the distributed blanking device 2.

The utility model discloses in, lump ore feed inlet 101 department on the lump ore storage silo 1 is equipped with first moisture detection device 3, material flow detection device 4 and material temperature detection device 5.

The utility model discloses in, lump ore discharge gate 102 department of lump ore storage silo 1 is equipped with second moisture detection device 6.

Preferably, the system further comprises a blast furnace 7. The lump ore discharge port 102 of the lump ore storage bin 1 is connected to the feed port of the blast furnace 7.

Preferably, the system further includes a dust removal system 8, and the heat medium outlet 104 is communicated to the dust removal system 8 through a heat medium discharge pipe L2.

Example 1

Example 2

As shown in fig. 2, example 1 is repeated except that the distribution blanking unit 2 is provided on the side wall of the lump ore storage silo 1. The distribution blanking device 2 comprises an upper part-material plate 201 and a lower part-material plate 202. The one end of upper portion flitch 201 and the one end of lower part flitch 202 are connected with the lateral wall of lump ore storage silo 1 respectively, and upper portion flitch 201 sets up in the top of lower part flitch 202, and upper portion flitch 201 downward sloping sets up, and lower part flitch 202 tilt up sets up, and the other end of upper portion flitch 201 and the other end of lower part flitch 202 extend and connect to the offside that distributes unloader 2 and lump ore storage silo 1 hookup location respectively. Namely, the side walls of the upper material distributing plate 201, the lower material distributing plate 202 and the lump ore storage bin 1 form a triangular structure on the vertical section. A gap is reserved between the triangular top formed by connecting the other end of the upper material plate 201 and the other end of the lower material plate 202 and the side wall of the lump ore storage bin 1. The gap is greater than 8 mm.

Example 3

The embodiment 2 is repeated, but 3 layers of the distributed blanking devices 2 are arranged in the lump ore storage bin 1 from top to bottom. The two adjacent layers of the distributed blanking devices 2 are arranged oppositely in the horizontal direction. The upper part material plates 201 of all the distribution blanking devices 2 are sequentially arranged to form a Z-shaped ore blanking channel A1.

Example 4

Example 3 is repeated, except that the upper material plate 201 of each layer of the distributed blanking device 2 is provided with the sieve holes 20101. Each layer of the distribution blanking device 2 is provided with a powder discharge opening 203. The powder discharge opening 203 is arranged on the side wall of the lump ore storage bin 1 and is connected with the lower material plate 202 of the distribution blanking device 2. The gap between the upper material distributing plate 201 and the lower material distributing plate 202 of each layer of the distribution blanking device 2 forms a powder blanking channel A2.

Example 5

Example 4 was repeated except that the size of the sieve opening 20101 was 7 mm.

Example 6

Example 4 was repeated except that the size of the sieve opening 20101 was 10 mm.

Example 7

As shown in fig. 3, example 3 is repeated except that the lump ore storage silo 1 is provided with a material distribution chamber 105, a heat exchange chamber 106 and a material collection chamber 107 from top to bottom. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. The heat medium inlet 103 of the lump ore storage silo 1 is arranged on the material collection chamber 107, and the heat medium outlet 104 is arranged on the material distribution chamber 105. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collection chamber 107, directly contacts with the lump ore for heat exchange, and then upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged from the heat medium outlet 104 on the material distribution chamber 105.

Example 8

As shown in fig. 4, the embodiment 5 is repeated except that the lump ore storage silo 1 is provided with a material distribution chamber 105, a heat exchange chamber 106 and a material collection chamber 107 from top to bottom. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. Meanwhile, the powder attached to the lump ore enters the powder blanking passage a2 through the sieve holes 20101 in the upper part plate 201 of each layer of the distribution blanking device 2, and is then discharged from the powder discharge ports 203 of each layer. The heat medium inlet 103 of the lump ore storage silo 1 is arranged on the material collection chamber 107, and the heat medium outlet 104 is arranged on the material distribution chamber 105. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collection chamber 107, directly contacts with the lump ore for heat exchange, and then upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged from the heat medium outlet 104 on the material distribution chamber 105.

Example 9

As shown in fig. 5, example 6 is repeated except that the lump ore storage silo 1 is provided with a material distribution chamber 105, a heat exchange chamber 106 and a material collection chamber 107 from top to bottom. The distribution blanking device 2 is arranged in a heat exchange chamber 106 in the middle of the lump ore storage bin 1. The lump ore feed opening 101 of the lump ore storage silo 1 is arranged on the material distribution chamber 105, and the lump ore discharge opening 102 is arranged on the material collection chamber 107. Lump ore enters the material distribution chamber 105 from the lump ore feed inlet 101 and then passes through the "Z" shaped lump ore discharge passage a1 of the distribution and discharge device 2 into the material collection chamber 107. Meanwhile, the powder attached to the lump ore enters the powder blanking passage a2 through the sieve holes 20101 in the upper part plate 201 of each layer of the distribution blanking device 2, and is then discharged from the powder discharge ports 203 of each layer. The material collection chamber 107 is provided with a heat medium inlet 103, each layer of distribution blanking device 2 is provided with a heat medium outlet 104, and the positions of the heat medium outlets 104 and the powder discharge port 203 are overlapped. The heat medium enters the lump ore storage bin 1 from the heat medium inlet 103 on the material collecting chamber 107, directly contacts with the lump ore for heat exchange, upwards passes through the blanking channel A1 of the Z-shaped lump ore and is discharged through the heat medium outlet 104 on each layer of distribution blanking devices 2.

Example 10

As shown in fig. 6 and 7, example 9 is repeated except that the system further comprises a thermal medium guiding device 108. The heat medium guiding device 108 is arranged in the material collecting chamber 107, and a heat medium guiding inlet 10801 and a heat medium guiding outlet 10802 are arranged on the heat medium guiding device 108. The heat medium inlet 103 of the lump ore storage bin 1 is communicated with the heat medium diversion inlet 10801. The material collection chamber 107 is provided with 3 heat medium guiding devices 108. The heat medium guide inlet 10801 of all the heat medium guide devices 108 is communicated with the heat medium inlet 103.

Example 11

Example 10 is repeated, except that the distribution blanking device 2 is further provided with an angle adjusting device 204. The angle adjusting device 204 is arranged on the side wall of the lump ore storage bin 1 and is connected with the upper part material plate 201 of the distributed blanking device 2. The upper part material plate 201 and the lower part material plate 202 of the distribution blanking device 2 are movably connected, and the angle adjusting device 204 is used for adjusting the included angle between the upper part material plate 201 and the side wall of the lump ore storage bin 1.

Example 12

Example 11 was repeated except that the lump ore feed port 101 of the lump ore storage silo 1 was provided with the first moisture detecting means 3, the material flow rate detecting means 4 and the material temperature detecting means 5.

Example 13

Example 11 was repeated except that the second moisture detecting device 6 was provided at the lump ore discharge port 102 of the lump ore storage silo 1.

Example 14

As shown in FIG. 1, example 13 is repeated except that the system further comprises a blast furnace 7. The lump ore discharge port 102 of the lump ore storage bin 1 is connected to the feed port of the blast furnace 7.

Example 15

Example 14 was repeated except that the system further included a dust removal system 8, and the thermal medium outlet 104 was communicated to the dust removal system 8 through a thermal medium discharge pipe L2.

By adopting the screening and drying integrated lump ore pretreatment system provided by the utility model, the dried large-particle-size lump ore obtained after pretreatment is conveyed to the blast furnace, the addition amount of the lump ore can be increased to 30% in the raw material added to the blast furnace, and the blast furnace smelting cost can be reduced by 12 yuan/ton molten iron in unit time; 2500m³The annual cost of the blast furnace is saved by 2160 ten thousand yuan.

In addition, because the iron content in the lump ore is higher than that of the sintered ore and the pellet ore, the addition amount of the pretreated lump ore is increased in the blast furnace, and the yield of the obtained molten iron can be increased by 10-30% through a blast furnace smelting process.

Claims

1. A lump ore screening and drying integrated pretreatment system comprises a lump ore conveying device (D1), a lump ore storage bin (1) and a heat medium conveying pipeline (L1); the lump ore storage bin (1) is provided with a lump ore feeding hole (101), a lump ore discharging hole (102), a heat medium inlet (103) and a heat medium outlet (104); the lump ore conveying device (D1) is connected to the lump ore feed inlet (101) of the lump ore storage bin (1); the heat medium conveying pipeline (L1) is connected to a heat medium inlet (103) of the lump ore storage bin (1); a distributed blanking device (2) is arranged in the lump ore storage bin (1); wherein: the height of the lump ore storage bin (1) is 3-100 m.

2. The pretreatment system of claim 1, wherein: the distributed blanking device (2) is arranged on the side wall of the lump ore storage bin (1); the distribution blanking device (2) comprises an upper material distributing plate (201) and a lower material distributing plate (202); one end of the upper part material plate (201) and one end of the lower part material plate (202) are respectively connected with the side wall of the lump ore storage bin (1), the upper part material plate (201) is arranged above the lower part material plate (202), the upper part material plate (201) is arranged in a downward inclined mode, the lower part material plate (202) is arranged in an upward inclined mode, and the other end of the upper part material plate (201) and the other end of the lower part material plate (202) respectively extend towards the opposite side of the connecting position of the distribution blanking device (2) and the lump ore storage bin (1).

3. The pretreatment system of claim 2, wherein: the other end of the upper material-distributing plate (201) and the other end of the lower material-distributing plate (202) are connected to each other.

4. The pretreatment system of claim 3, wherein: the other end of the upper material distributing plate (201) is movably connected with the other end of the lower material distributing plate (202), namely the side walls of the upper material distributing plate (201), the lower material distributing plate (202) and the lump ore storage bin (1) form a triangular structure on the vertical section; a gap is reserved between a triangular top formed by connecting the other end of the upper material distributing plate (201) and the other end of the lower material distributing plate (202) and the side wall of the lump ore storage bin (1).

5. The pretreatment system of claim 4, wherein: the gap is greater than 5 mm.

6. The pretreatment system of claim 5, wherein: the gap is greater than 6 mm.

7. The pretreatment system of claim 6, wherein: the gap is greater than 8 mm.

8. The pretreatment system of any one of claims 2-7, wherein: 1-20 layers of the distributed blanking devices (2) are arranged in the lump ore storage bin (1) from top to bottom.

9. The pretreatment system of claim 8, wherein: 2-10 layers of distributed blanking devices (2) are arranged in the lump ore storage bin (1) from top to bottom.

10. The pretreatment system of claim 9, wherein: 3-8 layers of distributed blanking devices (2) are arranged in the lump ore storage bin (1) from top to bottom.

11. The pretreatment system of claim 10, wherein: the two adjacent layers of the distributed blanking devices (2) are arranged oppositely in the horizontal direction; the upper material plates (201) of all the distributed blanking devices (2) are sequentially arranged to form a 'Z' -shaped ore blanking channel (A1).

12. The pretreatment system of claim 8, wherein: the upper material distributing plate (201) of each layer of the distributed blanking device (2) is provided with a sieve hole (20101).

13. The pretreatment system of any one of claims 9-11, wherein: the upper material distributing plate (201) of each layer of the distributed blanking device (2) is provided with a sieve hole (20101).

14. The pretreatment system of claim 12, wherein: each layer of distributed blanking device (2) is provided with a powder discharge port (203); the powder discharge port (203) is arranged on the side wall of the lump ore storage bin (1) and is connected with the lower material plate (202) of the distribution blanking device (2); the gap between the upper material distributing plate (201) and the lower material distributing plate (202) of each layer of the distribution blanking device (2) forms a powder blanking channel (A2).

15. The pretreatment system of claim 13, wherein: each layer of distributed blanking device (2) is provided with a powder discharge port (203); the powder discharge port (203) is arranged on the side wall of the lump ore storage bin (1) and is connected with the lower material plate (202) of the distribution blanking device (2); the gap between the upper material distributing plate (201) and the lower material distributing plate (202) of each layer of the distribution blanking device (2) forms a powder blanking channel (A2).

16. The pretreatment system according to claim 14 or 15, wherein: the size of the sieve holes (20101) is 5-20 mm.

17. The pretreatment system of claim 16, wherein: the size of the sieve holes (20101) is 6-15 mm.

18. The pretreatment system of claim 17, wherein: the size of the sieve holes (20101) is 7-10 mm.

19. The pretreatment system of claim 8, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); a heat medium inlet (103) of the lump ore storage bin (1) is arranged on the material collecting chamber (107), and a heat medium outlet (104) is arranged on the material distributing chamber (105); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel (A1) to be discharged from a heat medium outlet (104) on the material distribution chamber (105).

20. The pretreatment system of any one of claims 9-11, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); a heat medium inlet (103) of the lump ore storage bin (1) is arranged on the material collecting chamber (107), and a heat medium outlet (104) is arranged on the material distributing chamber (105); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel (A1) to be discharged from a heat medium outlet (104) on the material distribution chamber (105).

21. The pretreatment system of any one of claims 12, 14-15, 17-18, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; a heat medium inlet (103) of the lump ore storage bin (1) is arranged on the material collecting chamber (107), and a heat medium outlet (104) is arranged on the material distributing chamber (105); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel (A1) to be discharged from a heat medium outlet (104) on the material distribution chamber (105).

22. The pretreatment system of claim 13, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; a heat medium inlet (103) of the lump ore storage bin (1) is arranged on the material collecting chamber (107), and a heat medium outlet (104) is arranged on the material distributing chamber (105); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel (A1) to be discharged from a heat medium outlet (104) on the material distribution chamber (105).

23. The pretreatment system of claim 16, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; a heat medium inlet (103) of the lump ore storage bin (1) is arranged on the material collecting chamber (107), and a heat medium outlet (104) is arranged on the material distributing chamber (105); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, and then upwards passes through the Z-shaped lump ore blanking channel (A1) to be discharged from a heat medium outlet (104) on the material distribution chamber (105).

24. The pretreatment system of any one of claims 12, 14-15, 17-18, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; the material collection chamber (107) is provided with a heat medium inlet (103), each layer of distribution blanking device (2) is provided with a heat medium outlet (104), and the heat medium outlet (104) is positioned on the side wall of the lump ore storage bin (1) between the upper material plate (201) and the lower material plate (202) of each layer of distribution blanking device (2).

25. The pretreatment system of claim 13, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; the material collection chamber (107) is provided with a heat medium inlet (103), each layer of distribution blanking device (2) is provided with a heat medium outlet (104), and the heat medium outlet (104) is positioned on the side wall of the lump ore storage bin (1) between the upper material plate (201) and the lower material plate (202) of each layer of distribution blanking device (2).

26. The pretreatment system of claim 16, wherein: a material distribution chamber (105), a heat exchange chamber (106) and a material collection chamber (107) are arranged in the lump ore storage bin (1) from top to bottom; the distributed blanking device (2) is arranged in a heat exchange chamber (106) in the middle of the lump ore storage bin (1); a lump ore feed inlet (101) of the lump ore storage bin (1) is arranged on the material distribution chamber (105), and a lump ore discharge outlet (102) is arranged on the material collection chamber (107); lump ore enters a material distribution chamber (105) from a lump ore feed inlet (101), and then passes through a Z-shaped lump ore blanking channel (A1) of the distribution blanking device (2) to enter a material collection chamber (107); meanwhile, powder attached to the lump ore enters a powder blanking channel (A2) through sieve holes (20101) on an upper part material plate (201) of each layer of the distribution blanking device (2) and is then discharged from powder discharge openings (203) of each layer; the material collection chamber (107) is provided with a heat medium inlet (103), each layer of distribution blanking device (2) is provided with a heat medium outlet (104), and the heat medium outlet (104) is positioned on the side wall of the lump ore storage bin (1) between the upper material plate (201) and the lower material plate (202) of each layer of distribution blanking device (2).

27. The pretreatment system of claim 24, wherein: the position of the heat medium outlet (104) is overlapped with the position of the powder discharge opening (203); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, upwards passes through the Z-shaped lump ore blanking channel (A1), and is discharged through a heat medium outlet (104) on each layer of distribution blanking devices (2).

28. The pretreatment system of claim 25 or 26, wherein: the position of the heat medium outlet (104) is overlapped with the position of the powder discharge opening (203); the heat medium enters the lump ore storage bin (1) from a heat medium inlet (103) on the material collection chamber (107), directly contacts with the lump ore for heat exchange, upwards passes through the Z-shaped lump ore blanking channel (A1), and is discharged through a heat medium outlet (104) on each layer of distribution blanking devices (2).

29. The pretreatment system of any one of claims 19, 22-23, 25-27, wherein: the system further comprises a thermal medium flow guiding device (108); the heat medium flow guiding device (108) is arranged in the material collecting chamber (107), and a heat medium flow guiding inlet (10801) and a heat medium flow guiding outlet (10802) are arranged on the heat medium flow guiding device (108); the heat medium inlet (103) of the lump ore storage bin (1) is communicated with the heat medium diversion inlet (10801).

30. The pretreatment system of claim 21, wherein: the system further comprises a thermal medium flow guiding device (108); the heat medium flow guiding device (108) is arranged in the material collecting chamber (107), and a heat medium flow guiding inlet (10801) and a heat medium flow guiding outlet (10802) are arranged on the heat medium flow guiding device (108); the heat medium inlet (103) of the lump ore storage bin (1) is communicated with the heat medium diversion inlet (10801).

31. The pretreatment system of claim 24, wherein: the system further comprises a thermal medium flow guiding device (108); the heat medium flow guiding device (108) is arranged in the material collecting chamber (107), and a heat medium flow guiding inlet (10801) and a heat medium flow guiding outlet (10802) are arranged on the heat medium flow guiding device (108); the heat medium inlet (103) of the lump ore storage bin (1) is communicated with the heat medium diversion inlet (10801).

32. The pretreatment system of claim 29, wherein: 1-20 heat medium diversion devices (108) are arranged in the material collection chamber (107); the heat medium diversion inlets (10801) of all the heat medium diversion devices (108) are communicated with the heat medium inlet (103); and/or

The distribution blanking device (2) is also provided with an angle adjusting device (204); the angle adjusting device (204) is arranged on the side wall of the lump ore storage bin (1) and is connected with the upper part material plate (201) of the distribution blanking device (2).

33. The pretreatment system of claim 30 or 31, wherein: 1-20 heat medium diversion devices (108) are arranged in the material collection chamber (107); the heat medium diversion inlets (10801) of all the heat medium diversion devices (108) are communicated with the heat medium inlet (103); and/or

34. The pretreatment system of claim 32, wherein: 2-5 heat medium diversion devices (108) are arranged in the material collection chamber (107).

35. The pretreatment system of claim 33, wherein: 2-5 heat medium diversion devices (108) are arranged in the material collection chamber (107).

36. The pretreatment system of any one of claims 1-7, 9-12, 14-15, 17-19, 22-23, 25-27, 30-32, 34-35, wherein: a first moisture detection device (3), a material flow detection device (4) and a material temperature detection device (5) are arranged at a lump ore feed inlet (101) on the lump ore storage bin (1); and/or

A second moisture detection device (6) is arranged at the lump ore discharge port (102) of the lump ore storage bin (1).

37. The pretreatment system of claim 8, wherein: a first moisture detection device (3), a material flow detection device (4) and a material temperature detection device (5) are arranged at a lump ore feed inlet (101) on the lump ore storage bin (1); and/or

38. The pretreatment system of claim 13, wherein: a first moisture detection device (3), a material flow detection device (4) and a material temperature detection device (5) are arranged at a lump ore feed inlet (101) on the lump ore storage bin (1); and/or

39. The pretreatment system of any one of claims 1-7, 9-12, 14-15, 17-19, 22-23, 25-27, 30-32, 34-35, 37-38, wherein: the system also comprises a blast furnace (7); the lump ore discharge hole (102) of the lump ore storage bin (1) is connected with the feed inlet of the blast furnace (7); and/or

The system further comprises a dust removal system (8), and the heat medium outlet (104) is communicated to the dust removal system (8) through a heat medium discharge pipeline (L2).

40. The pretreatment system of claim 8, wherein: the system also comprises a blast furnace (7); the lump ore discharge hole (102) of the lump ore storage bin (1) is connected with the feed inlet of the blast furnace (7); and/or

41. The pretreatment system of claim 13, wherein: the system also comprises a blast furnace (7); the lump ore discharge hole (102) of the lump ore storage bin (1) is connected with the feed inlet of the blast furnace (7); and/or