CN114370758B - Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by same - Google Patents

Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by same Download PDF

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Publication number
CN114370758B
CN114370758B CN202110320936.2A CN202110320936A CN114370758B CN 114370758 B CN114370758 B CN 114370758B CN 202110320936 A CN202110320936 A CN 202110320936A CN 114370758 B CN114370758 B CN 114370758B
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belt conveyor
heat medium
distribution plate
type belt
reciprocating swing
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CN114370758A (en
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赵强
魏进超
马钟琛
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/26—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by reciprocating or oscillating conveyors propelling materials over stationary surfaces; with movement performed by reciprocating or oscillating shelves, sieves, or trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/02—Applications of driving mechanisms, not covered by another subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/08—Granular materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Microbiology (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a reciprocating swing type belt machine, which comprises a distribution plate (101), a horizontal driving device (102) and a swing driving device (103). Wherein: the horizontal driving device (102) is connected with the distribution plate (101) and drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1); the swing driving device (103) is connected with the distribution plate (101) and drives the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1). The reciprocating swing type belt conveyor is provided with a heat medium inlet (104), a heat medium outlet (105), a material inlet (106) and a material outlet (107). The distribution plate (101) is provided with sieve holes (10101). The reciprocating swing type belt conveyor solves the problem of feeding raw materials into the furnace, improves the feeding proportion and the air permeability level of the raw materials of the blast furnace, effectively reduces the production cost of the blast furnace, and improves the forward running level of the blast furnace.

Description

Reciprocating swing type belt conveyor and method for preprocessing iron ore lump ore by same
Technical Field
The invention relates to a lump ore pretreatment device and a process thereof, in particular to a reciprocating swing type belt conveyor and a method for pretreating iron ore lump ores, belonging to the technical field of steel smelting.
Background
Steel is used as an irreplaceable structural and functional material in the industrialized process, and the consumption of the steel occupies more than 95% of the total consumption of metal in a quite long time. Pig iron raw materials required by the iron and steel industry are mainly provided by blast furnace smelting, and improvement and cost reduction of the blast furnace smelting technology have great significance for promoting the development of iron and steel enterprises. The basic link of the blast furnace intensified smelting is concentrate operation, the natural lump ore is used as one of the main components of the furnace charging material, and the addition amount of the natural lump ore can reach 30 percent at most. Because the lump ore has higher water content, after the high-moisture lump ore is charged into the furnace, energy is consumed for moisture drying, a certain time is required for the drying process, and the coke ratio of the blast furnace is improved, so that the air permeability of a blast furnace burden layer is influenced, the smelting cost of the blast furnace is increased, and the stability of the furnace condition is influenced. Therefore, the reduction of the lump ore water content has important significance for reducing the iron-making cost and enhancing the stability of the furnace condition. At present, the lump ore drying system has the problems of high construction cost, low drying efficiency, high energy consumption and the like.
Common furnace charge materials for blast furnaces include sinter, pellet and natural lump ore. The reasonable blast furnace burden structure is that the optimum matching proportion of different iron-containing ores is found out by adjusting the proportion of sinter, pellet and natural lump ore in the charged iron ore, so that various economic and technical indexes of blast furnace smelting under the burden structure are relatively ideal, and the consumption cost of unit pig iron smelting is relatively lowest. Research shows that the cost expenditure of raw material links such as iron ore occupies about 60% of the total cost of pig iron, the market price of lump ore is basically equal to that of fine ore, the cost price is far lower than that of sinter ore and pellet ore, and the improvement of the charging proportion of 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 lower. The reason for this is that iron ore agglomerate has problems of high powder and moisture content. The powder (material with the grain diameter smaller than 8 mm) content of the iron ore lump ore is generally 10-30%, and the lump ore with high powder content directly enters a blast furnace system without screening treatment, so that the harm to the air permeability of a blast furnace burden 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 individual port steel mill rainy season lump ore is even more than 20%. After the high-moisture lump ore is charged into the furnace, energy is consumed for moisture drying, and a certain time is required for the drying process, so that the coke ratio of the blast furnace is improved.
At present, the effective classification and granule finishing of the iron ore lump ore are difficult to realize by the pre-iron screening technology due to the high dust rate of the iron ore lump ore. Because the water content of the iron ore lump ore is high, the screening effect is not ideal, so that the powder ore adhered to the surface of the iron ore lump ore finally enters a blast furnace, the air permeability of the blast furnace is influenced, the smelting cost of the blast furnace is increased, and the stability of the furnace condition is influenced. (1) the iron ore agglomerate is directly fed into the furnace without pretreatment. Because the iron ore lump ore powder has high content and large moisture, the direct charging of the non-pretreated lump ore into the furnace not only consumes energy and improves the coke ratio of the blast furnace, but also reduces the air permeability level of the blast furnace, influences the normal production of the blast furnace, and has obvious influence on the smooth flow of steel and the economic benefit of steel plants. And (2) the iron ore block ore is subjected to screening pretreatment and directly fed into a furnace. The iron ore lump ore after screening pretreatment has high moisture content, the moisture drying after directly entering the furnace needs to consume energy, the drying process needs a certain time, and the coke ratio of the blast furnace is improved. (3) The iron ore block ore is directly fed into the furnace after being subjected to cylinder drying pretreatment. The content of lump ore powder after barrel drying pretreatment is still higher, and after high-powder iron lump ore enters the furnace, the air permeability level of the blast furnace is reduced, the normal production of the blast furnace is influenced, and the influence on the smooth flow of steel and the economic benefit of steel plants is obvious. The drum drying investment is large, the operation cost is high, the iron ore lump ore is crushed due to mutual extrusion in the drying process, new powder is generated, and the influence on the air permeability of the blast furnace after entering the furnace is large.
Therefore, the reduction of the water content in the iron ore lump ore has important significance for reducing the iron-making cost and enhancing the stability of the furnace condition. At present, the lump ore drying system has the problems of high construction cost, low drying efficiency, high energy consumption and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reciprocating swing type belt conveyor and a method for preprocessing iron ore lump ore by using the same. The invention is provided with a distributing plate in the reciprocating swing type belt machine, and the distributing plate is provided with sieve holes. Firstly, according to the characteristic of strong adhesiveness of the iron ore lump ore powder, the powder in the iron ore lump ore is efficiently screened out by utilizing the self-swinging advantage of a reciprocating swinging belt conveyor; secondly, by utilizing the characteristic of abundant hot waste gas resources in the steel process, the hot waste gas is nearby introduced into the reciprocating swing type belt conveyor, and the iron ore lump ore is dried in the reciprocating swing type belt conveyor, so that the moisture of the lump ore is reduced. The invention solves the difficult problem of lump ore charging, improves the charging proportion and the air permeability level of the blast furnace lump ore, effectively reduces the production cost of the blast furnace and improves the forward running level of the blast furnace.
According to a first embodiment of the present invention, a belt machine of the reciprocating oscillating type is provided.
A reciprocating swing type belt machine comprises a distribution plate, a horizontal driving device and a swing driving device. The horizontal driving device is connected with the distributing plate and drives the distributing plate to move along the length direction of the reciprocating swing type belt conveyor. The swing driving device is connected with the distribution plate and drives the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the distribution plate to swing along the length direction of the reciprocating swing type belt machine. The reciprocating swing type belt conveyor is provided with a heat medium inlet, a heat medium outlet, a material inlet and a material outlet. The material inlet sets up the front end at the distribution board, and the material outlet sets up the end at the distribution board, is equipped with the sieve mesh on the distribution board.
In the present invention, the reciprocating swing type belt machine further includes a hood. The distribution plate is arranged in the engine cover, and the heat medium inlet and the heat medium outlet are both arranged on the engine cover.
Preferably, the heat medium inlet is provided at an upper portion or top of the hood, and the heat medium outlet is provided at a lower portion or bottom of the hood.
Further preferably, the thermal medium inlet is provided on the housing above the material outlet. The heat medium outlet is arranged on the machine cover and is positioned below the material inlet.
In the invention, the reciprocating swing type belt machine further comprises a bracket, and the distribution plate is arranged on the bracket. The swing driving device comprises a driving device, and the driving device is connected with the distribution plate through a bracket. The driving device is a servo motor.
Preferably, the swing driving device further comprises a transmission control shaft, and the driving device is connected with the bracket through the transmission control shaft and drives the bracket and the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the bracket and the distribution plate to swing along the length direction of the reciprocating swing type belt machine.
Preferably, the swing driving device further comprises a swing traction rope, the driving device is connected with the bracket through the swing traction rope, and drives the bracket and the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the bracket and the distribution plate to swing along the length direction of the reciprocating swing type belt machine.
In the present invention, the reciprocating swing type belt machine further includes a first moisture detecting means. The first moisture detection device is arranged at the material inlet.
Preferably, the reciprocating belt conveyor further comprises a second moisture detecting means. The second moisture detection device is arranged at the material outlet.
In the invention, the bottom of the reciprocating swing type belt conveyor is provided with a powder outlet.
Preferably, the mesh has a pore diameter of 5 to 20mm, preferably 6 to 15mm, more preferably 7 to 10mm.
According to a second embodiment of the present invention, a method for pre-treating iron ore nuggets by a reciprocating belt machine is provided.
A method for pre-treating iron ore nuggets using the reciprocating belt machine of the first embodiment, the method comprising the steps of:
1) The iron ore lump ore to be treated is conveyed to the reciprocating swing type belt conveyor, the iron ore lump ore to be treated enters from the material inlet and is distributed on the distribution plate, and the heat medium enters from the heat medium inlet into the reciprocating swing type belt conveyor.
2) The horizontal driving device drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor, and the iron ore block ore moves along the distribution plate from the material inlet to the material outlet. The swing driving device drives the distribution plate to swing back and forth along the width direction of the reciprocating swing type belt conveyor or drives the distribution plate to swing back and forth along the length direction of the reciprocating swing type belt conveyor, and the iron ore block is in a sliding state on the distribution plate.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor. The granular iron ore is discharged from the material outlet after being processed by a reciprocating swing type belt conveyor. The powdered iron ore is screened through the mesh openings in the distributor plate and then discharged from the powder outlet. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet.
In the present invention, the method further comprises: 4) The granulated iron ore lump ore discharged from the material outlet is transferred to a blast furnace system.
Preferably, the method further comprises: 5) The powdered iron ore nuggets discharged from the fines outlet are transported to a sinter batching system.
Preferably, the method further comprises: 6) The heat medium discharged from the heat medium outlet is transferred to the dust removing system.
In the present invention, in step 1), the moisture content in the iron ore agglomerate to be treated is detected by the first moisture detecting means while the iron ore agglomerate to be treated is conveyed to the reciprocating swing type belt conveyor.
Preferably, in step 3), the moisture content in the granulated iron ore lump ore discharged from the material outlet is detected by the second moisture detecting means while the granulated iron ore lump ore is discharged from the material outlet.
In the invention, the water content in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor is detected by a first water content detection device and is marked as W 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%). Calculating the residence time t and h of the iron ore block ore in the reciprocating swing type belt conveyor;
wherein: v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k (k) 1 For the residence time adjustment constant, the value is from 0.1 to 1, preferably from 0.2 to 0.8, more preferably from 0.3 to 0.6. At the position ofThe flow rate of the heat medium is V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) The retention time of the iron ore lump ore in the reciprocating swing type belt machine is kept to be t, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt machine is lower than W max 。
In the present invention, the moisture content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor is detected by a first moisture detecting device and is denoted as W 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%). Calculating the moving speed S, m/min of the horizontal driving device driving the distribution plate;
wherein: l is the length of the distribution plate, m; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k (k) 2 For the movement speed adjustment constant, the value is 1 to 10, preferably 1.25 to 5, more preferably 1.67 to 3.33. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) Under the condition of maintaining the moving speed of the horizontal driving device to drive the distribution plate to be S, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt conveyor is lower than W max 。
In the invention, the water content in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor is detected by a first water content detection device and is marked as W. Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%). And detecting the content of powder mineral materials in the iron ore block ore to be treated entering the reciprocating swing type belt conveyor, and recording the content as M. Calculating the swing frequency f of the swing driving device for driving the distribution plate, and performing times/min;
wherein: v (V) Medium (C) Is heat ofFlow rate of medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k is a wobble frequency adjustment constant, and is 0.1 to 0.6, preferably 0.2 to 0.5, and more preferably 0.25 to 0.4. The content of the powder mineral aggregate is that the mineral aggregate with the grain diameter smaller than 8mm accounts for the weight ratio of the whole iron ore lump ore. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) Under the condition that the swing frequency of the swing driving device driving the distribution plate is kept to be f, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt conveyor is lower than W max And the powder content in the iron ore lump ore is less than 5 percent.
In the application, the heat medium is a heat source generated by the steel process. Preferably, the heat medium is a heat source released by burning sintering circular cooler hot exhaust gas, blast furnace hot blast stove exhaust gas and coke oven gas/blast furnace gas/converter gas. Further preferably, the exhaust gas from the sintering circular cooler and the exhaust gas from the blast furnace hot blast stove.
Preferably, the temperature of the heat medium entering the reciprocating belt conveyor is greater than 100 ℃, preferably greater than 150 ℃.
Preferably, the air flow velocity of the heat medium into the reciprocating belt conveyor is 0.1 to 4m/s, preferably 0.3 to 3m/s, more preferably 0.5 to 2m/s.
The application provides a reciprocating swing type belt conveyor and a method for preprocessing iron ore lump ores by the same. Aiming at the difficult problem of high content of powder and water in natural lump ores, the application provides a method for drying and screening blanking by adopting a reciprocating swing type belt conveyor. The reciprocating swing type belt conveyor is internally provided with a distribution plate, sieve holes are formed in the distribution plate, the block mineral materials are distributed on the distribution plate after entering the belt conveyor, and the distribution plate swings back and forth along the width direction (or the length direction) of the belt conveyor in the travelling process of the belt conveyor, so that heat exchange between the sieving of fine particle materials in the block mineral and gas-solid (namely between a heat medium and the block mineral) is promoted. Among them, the heat source required for drying lump ore in the belt conveyor is preferably from a steel mill hot exhaust gas (e.g., a hot exhaust gas generated by a blast furnace). The block mineral material is screened and dried on the distribution plate simultaneously, the screening efficiency of the material after being dried is higher, and the drying effect of the material after being screened is better. The lump ore continuously slides from the distribution plate to advance, drying and screening are completed in the advancing process, air flow is continuously introduced through a heat medium inlet at the upper part or the top of the belt conveyor, materials are in a sliding state in the distribution plate, the air permeability of the whole distribution plate is greatly improved, and the heat exchange effect between air and solid is good, so that the powder and the moisture content of the lump ore are reduced. Coarse-grain materials after screening and drying are discharged from a material outlet at the tail end of the distribution plate, fine-grain materials fall onto a belt conveyor, and the fine-grain materials are collected in the circulating rotation process of the belt conveyor and then are discharged from a powder outlet. The material inlet and the material outlet of the reciprocating swing type belt conveyor are respectively provided with a moisture detection device, and the retention time of the iron ore lump ore in the belt conveyor and/or the moving speed of the distribution plate (namely the sliding travelling speed of the iron ore lump ore) are/is reasonably adjusted according to the moisture detection data so as to ensure that the moisture content of the granular iron ore lump ore discharged from the material outlet of the belt conveyor meets the requirement. In addition, the swing frequency of the distribution plate can be adjusted by detecting the moisture content of the iron ore block ore to be treated and the content of the powder ore material, so that the moisture content and the content of the powder ore material in the granular iron ore block ore discharged from the material outlet of the belt conveyor are ensured to meet the requirements. The application can greatly improve the contact efficiency of the hot air flow and the lump ore, improves the air permeability of the belt conveyor and strengthens the screening and drying effects. The popularization of the application has good economic benefit and environmental benefit, and is hopeful to open up a more stable and efficient way for the development of the lump ore pretreatment process in China.
Researches show that the drying treatment of lump ores in the belt conveyor by using the heat source gas is feasible, not only can the moisture of the lump ores entering the furnace be effectively reduced, but also the energy consumption required by drying can be greatly reduced, and the proportion of the lump ores entering the furnace after drying can be improved to a certain extent, so that the smelting cost of the blast furnace is reduced. However, lump ore exists in a stacking state in the belt machine, particularly, fine materials exist, so that the air permeability of the whole material of the belt machine is deviated, hot air flows cannot smoothly penetrate through a material body, the lump ore is in uneven contact with a heat medium in the belt machine, and the drying effect is poor. Meanwhile, in the prior art, screening and drying pretreatment of lump ores are basically carried out separately by different devices, so that the cost of the pretreatment of lump ores is increased.
Thus, the invention provides a reciprocating swing type belt conveyor for lump ore pretreatment, aiming at the defects of drying lump ore in a traditional belt conveyor. The reciprocating swing type belt conveyor comprises a distribution plate, a horizontal driving device and a swing driving device. The distribution plate is arranged in the reciprocating swing type belt conveyor, and the horizontal driving device is connected with the distribution plate and drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor. The swing driving device is connected with the distribution plate and drives the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the distribution plate to swing along the length direction of the reciprocating swing type belt machine. The reciprocating swing belt machine is a closed box structure including a hood. The machine cover is provided with a heat medium inlet, a heat medium outlet, a material inlet and a material outlet. The positions of the material inlet and the material outlet on the hood are respectively sealed by adopting flexible connection, so that the belt conveyor is ensured to be a relatively closed environment, and the moisture removal efficiency of lump ores is further improved. In the invention, the distribution plate is arranged in the hood, and the distribution plate is provided with sieve holes. The distribution plate moves along the length direction of the reciprocating swing type belt conveyor under the action of the horizontal driving device. The iron ore lump ore is distributed in a scattered form on the distribution plate and continuously slides towards the direction of the material outlet along with the movement of the distribution plate. While the materials slide on the distribution plate, powdery fine-grained materials (less than 8mm of materials) fall into the lower part or the bottom of the reciprocating swing type belt conveyor from the sieve holes, so that the screening of lump ore materials is realized. The material is the slip state of bulk on the distribution plate, and fine particle material is removed by the screen cloth simultaneously, and the gas permeability of whole reciprocal swing formula belt conveyor obtains very big improvement, and the hot air current can pass the material body smoothly, therefore the material is more even abundant with the contact of heat medium in the belt conveyor, and the heat exchange effect between the gas is better, can more effectual moisture in the reduction iron ore block ore.
In the invention, the material inlet of the reciprocating swing type belt conveyor is arranged on the machine cover and positioned at the front end of the distribution plate, and the material outlet is arranged at the tail end of the distribution plate. The heat medium inlet is provided at the upper part or top of the hood and above the material outlet. The heat medium outlet is arranged at the lower part or the bottom of the hood and is positioned below the material inlet. Obviously, the arrangement of the positions of the heat medium inlet and the heat medium outlet changes the trend of the air flow entering from the lower part of the drying device to the upper part in the conventional arrangement, so that the invention can be provided with an air draft system at the heat medium outlet. In the invention, the heat medium enters the belt conveyor from the heat medium inlet at the upper part or the top of the hood, passes through the material body on the distribution plate from top to bottom, directly contacts with the block mineral material on the distribution plate for heat exchange, and then the air draft system withdraws the heat medium from the heat medium outlet at the lower part or the bottom of the hood. When the heat medium evenly distributed in the belt conveyor is extracted, the heat medium can pass through the sieve holes on the distribution plate, and air flow formed by the heat medium passes through the sieve holes, so that powder attached to lump ore is brought into the lower part of the sieve holes, namely, the trend of the air flow of the heat medium is consistent with the trend of screened undersize fine grained materials, and the screening effect of the distribution plate on the lump ore materials is enhanced, and the air permeability in the whole belt conveyor is greatly improved, so that the screening and drying effects are improved. Further preferably, the heat medium inlet is located above the material outlet, the heat medium outlet is located below the material inlet, that is, the flow direction of the heat medium from the heat medium inlet to the heat medium outlet is basically opposite to the flow direction of the material from the material inlet to the material outlet, so that the heat medium entering the belt conveyor from the heat medium inlet can fill the whole box body from side to side from top to bottom, and in the process of sliding the material from the material inlet to the material outlet, the heat medium can be in effective and sufficient contact with the material on the distribution plate as much as possible, thereby further improving the sieving and drying effects.
In the present invention, the reciprocating swing type belt machine further includes a bracket and a swing driving device. The distribution plate is arranged on the bracket. The swing driving device comprises a driving device, and the driving device is connected with the distribution plate through a bracket. Wherein, drive arrangement is servo motor. Preferably, the swing driving device further comprises a transmission control shaft, the driving device is connected with the transmission control shaft and is connected with the bracket through the transmission control shaft, and the driving device drives the bracket and the distribution plate to swing along the width direction of the reciprocating swing type belt machine or drives the bracket and the distribution plate to swing along the length direction of the reciprocating swing type belt machine. Further preferably, the swing drive further comprises a swing traction rope. The driving device is connected with the swinging traction rope and is connected with the bracket through the swinging traction rope, and the driving device drives the bracket and the distribution plate to swing along the width direction of the reciprocating swinging type belt machine or drives the bracket and the distribution plate to swing along the length direction of the reciprocating swinging type belt machine. Under the drive of the horizontal driving device, the block mineral materials slide on the distribution plate along the length direction of the belt conveyor, in the process, the belt conveyor simultaneously promotes the screening of fine particle materials in the block mineral and the heat exchange between gas and solid in a reciprocating swing mode of the distribution plate so as to improve the screening and drying effects of the block mineral materials, and further solve the problem of high content of powder and water in the block mineral materials.
Preferably, the reciprocating swing type belt conveyor further comprises a first moisture detection device arranged at the material inlet and a second moisture detection device arranged at the material outlet. The first moisture detecting device is used for detecting the moisture content of the iron ore agglomerate to be treated entering the belt conveyor, and the second moisture detecting device is used for detecting the moisture content of the granular iron ore agglomerate discharged from the material outlet. If the water content of the iron ore block to be treated detected by the first water detection device is higher or lower, the residence time of the iron ore block in the belt conveyor can be reasonably adjusted according to the water detection data, or the moving speed of the horizontal driving device for driving the distribution plate can be reasonably adjusted according to the water detection data, and the swing frequency of the distribution plate can be driven by the swing driving device can be adjusted, so that the water content of the granular iron ore block discharged from the material outlet and the powder ore material content meet the requirements.
Accordingly, the invention can also perform feedback adjustment according to the moisture content of the granular iron ore lump ore discharged from the material outlet detected by the second moisture detecting device. If the moisture content of the granular iron ore lump ore detected by the second moisture detection device is higher, the moving speed of the horizontal driving device for driving the distribution plate can be reduced to prolong the residence time of the iron ore lump ore in the belt conveyor, or the swinging frequency of the distribution plate is increased by controlling the swinging driving device, so that the contact time and the contact area of the iron ore lump ore and a heat medium are increased, the evaporation of the moisture in the iron ore lump ore is accelerated, and the screening effect is also improved. In contrast, when the moisture content of the granular iron ore lump ore discharged from the material outlet detected by the second moisture detecting device is too low, the moving speed of the horizontal driving device for driving the distributing plate can be properly increased to shorten the residence time of the iron ore lump ore in the belt conveyor, or the swinging frequency of the distributing plate is reduced or the swinging driving device is stopped to start by controlling the swinging driving device, so that the energy consumption required for drying is reduced, the resource is saved and the cost is reduced while the moisture content of the discharged granular iron ore lump ore is ensured to meet the requirement.
The invention also provides a method for preprocessing the iron ore lump ore by the reciprocating swing type belt conveyor. The invention provides a pretreatment method for drying and screening by adopting a reciprocating swing type belt conveyor aiming at the difficult problems of large powder and water content of natural lump ores. The method comprises the steps of firstly conveying iron ore block to be treated to a reciprocating swing type belt conveyor, enabling the iron ore block to be treated to enter from a material inlet and be distributed on a distribution plate, and enabling a heat medium to enter from a heat medium inlet to the reciprocating swing type belt conveyor. The horizontal driving device drives the distribution plate to move along the length direction of the reciprocating swing type belt conveyor, and the iron ore block ore moves along the distribution plate from the material inlet to the material outlet. The swing driving device drives the distribution plate to swing back and forth along the width direction of the reciprocating swing type belt conveyor or drives the distribution plate to swing back and forth along the length direction of the reciprocating swing type belt conveyor, and the iron ore block is in a sliding state on the distribution plate. The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor. The invention solves the difficult problem of feeding raw materials into the furnace, improves the feeding proportion and the air permeability level of the raw materials of the blast furnace, effectively reduces the production cost of the blast furnace and improves the forward running level of the blast furnace.
In the present invention, the lump ore is subjected to a drying pretreatment in a reciprocating swing type belt conveyor to remove moisture from the lump ore, and a heat source required for drying is preferably from hot exhaust gas of a steel mill (e.g., hot exhaust gas generated by a blast furnace). Meanwhile, because lump ore generally exists in a stacking state in a traditional belt conveyor, particularly fine-grained materials exist, the air permeability of the whole material of the belt conveyor is deviated, hot air flows cannot smoothly penetrate through a material body, and the drying effect is poor. Aiming at the defects of the traditional belt conveyor, the invention provides a reciprocating swing type belt conveyor, wherein a distribution plate is arranged in the reciprocating swing type belt conveyor, sieve holes are formed in the distribution plate, and the distribution plate swings in a reciprocating manner in the advancing process of the reciprocating swing type belt conveyor so as to promote heat exchange between sieving out of material powder (materials smaller than 8 mm) and gas and solid. Compared with the traditional cylinder drying process, the pretreatment method provided by the invention adopts a pretreatment technology of drying by a reciprocating swing type belt conveyor, has high water removal efficiency of lump ore, solves the problem of charging the lump ore into a furnace (blast furnace), improves the charging proportion and air permeability level of the blast furnace lump ore, effectively reduces the production cost of the blast furnace, and improves the forward running level of the blast furnace. The popularization of the invention has good economic benefit, social benefit and environmental benefit, and is hopeful to open up a more stable and efficient way for the development of the lump ore pretreatment process in China.
Preferably, the natural lump ore is dried and sieved in a reciprocating belt conveyor, and then the granulated iron lump ore is discharged from a material outlet and conveyed to a blast furnace system for smelting. The powdered iron ore is dropped onto a belt conveyor through the mesh openings in the distribution plate and discharged from the powder outlet for delivery to the sinter batching system. Preferably, the heat medium is discharged from the heat medium outlet and conveyed to the dust removal system.
In the invention, the first moisture detection device is arranged at the material inlet of the reciprocating swing type belt conveyor to detect the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor in real time 0 (in%). Setting lump ore entering the blast furnace according to the requirements of blast furnace conditionsThe upper limit of the water content is W max (in%). Calculating the residence time t and h of the iron ore block ore in the reciprocating swing type belt conveyor;
wherein: w (W) 0 The method comprises the steps that the moisture content of iron ore lump ores to be treated entering a reciprocating swing type belt conveyor is detected by a first moisture detection device,%; w (W) max In order to enter the upper limit of the water content of the lump ore in the blast furnace, the adjustment and the setting can be carried out according to the requirement, for example, W max Less than or equal to 4 percent; t is the residence time of the iron ore block in the reciprocating swing type belt conveyor, and h; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k (k) 1 For the residence time adjustment constant, the value is from 0.1 to 1, preferably from 0.2 to 0.8, more preferably from 0.3 to 0.6.
In the above formula, the residence time of the iron ore lump ore in the belt conveyor is proportional to the moisture content in the iron ore lump ore to be treated and inversely proportional to the temperature of the heat medium when the heat medium enters the belt conveyor and the flow rate of the heat medium, i.e., the higher the moisture content in the iron ore lump ore to be treated, the lower the temperature of the heat medium when the heat medium enters the belt conveyor and the lower the flow rate of the heat medium, the longer the time the iron ore lump ore needs to stay in the belt conveyor to ensure the drying effect of the iron ore lump ore in the belt conveyor. Conversely, the residence time of the iron ore lump ore in the belt conveyor can be shortened. Wherein the flow rate of the heat medium is V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) The retention time of the iron ore lump ore in the reciprocating swing type belt machine is kept to be t, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt machine is lower than W max 。
In the invention, the first moisture detection device is arranged at the material inlet of the reciprocating swing type belt conveyor to detect the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor in real time 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%). Calculating a horizontal drive device drive profileThe moving speed S, m/min of the plate;
wherein: s is the moving speed of the horizontal driving device driving the distribution plate, m/min; l is the length of the distribution plate, m; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k (k) 2 For the movement speed adjustment constant, the value is 1 to 10, preferably 1.25 to 5, more preferably 1.67 to 3.33.
In the above formula, the moving speed of the horizontal driving device driving the distributing plate is in direct proportion to the length of the distributing plate, the temperature of the heat medium entering the belt conveyor and the flow rate of the heat medium, and is in inverse proportion to the moisture content in the iron ore lump ore to be treated, namely, the longer the length of the distributing plate, the higher the temperature of the heat medium entering the belt conveyor, the faster the flow rate of the heat medium and the lower the moisture content in the iron ore lump ore to be treated, the faster the moving speed of the horizontal driving device driving the distributing plate is, so as to ensure the drying effect of the iron ore lump ore in the belt conveyor. On the contrary, the moving speed of the horizontal driving device for driving the distribution plate can be reduced. Wherein the flow rate of the heat medium is V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) Under the condition of maintaining the moving speed of the horizontal driving device to drive the distribution plate to be S, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt conveyor is lower than W max 。
In the invention, the first moisture detection device is arranged at the material inlet of the reciprocating swing type belt conveyor to detect the moisture content W in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor in real time 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%). And detecting the content M,% > of the powder mineral aggregate in the iron ore block to be treated entering the reciprocating swing type belt conveyor. Calculating the swing frequency f of the swing driving device for driving the distribution plate, and performing times/min;
wherein: f is the swing frequency of the swing driving device driving the distribution plate, and the frequency is less than/min; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor, and is at the temperature DEG C; k (k) 3 For the wobble frequency adjustment constant, the value is 0.1 to 0.6, preferably 0.2 to 0.5, more preferably 0.25 to 0.4; m is the content of powder mineral aggregate in the iron ore block to be treated entering the reciprocating swing type belt conveyor. The powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore.
In the above formula, the swing frequency of the swing driving device driving the distribution plate is in direct proportion to the moisture content in the iron ore block ore to be treated and the content of the powder ore material, and is in inverse proportion to the temperature when the heat medium enters the belt conveyor and the flow rate of the heat medium, namely, the higher the moisture content in the iron ore block ore to be treated, the higher the content of the powder ore material in the iron ore block ore to be treated, the lower the temperature when the heat medium enters the belt conveyor and the slower the flow rate of the heat medium, the swing frequency of the swing driving device driving the distribution plate is faster, so that the drying and screening effects of the iron ore block ore in the belt conveyor are ensured. On the contrary, the swing frequency of the swing driving device for driving the distribution plate can be reduced. Wherein the flow rate of the heat medium is V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor is T Medium (C) Under the condition that the swing frequency of the swing driving device driving the distribution plate is kept to be f, so that the moisture content of the granular iron ore lump ore discharged from the material outlet of the reciprocating swing type belt conveyor is lower than W max And the powder content in the iron ore lump ore is less than 5 percent. In the present invention, the method for detecting the content of the powdery mineral material in the iron ore lump ore to be treated which enters the reciprocating swing type belt conveyor is not limited, and the detection can be realized. For example, the relevant data may be obtained by means of sampling detection or the like before the iron ore lump ore enters the belt conveyor.
In the present application, the heat medium may be hot exhaust gas having a relatively high temperature, or may be hot air after being subjected to heat treatment. Generally, the temperature of the heat medium is above 100 ℃. Preferably greater than 150 ℃.
In the present application, the length of the reciprocating belt conveyor is generally 2 to 300m, preferably 3 to 200m, more preferably 5 to 100m, still more preferably 8 to 80m, still more preferably 10 to 60m.
In the present application, the width of the reciprocating belt conveyor is generally 0.2 to 100m, preferably 1 to 80m, more preferably 2 to 60m, still more preferably 5 to 40m.
In the present application, the "granulated iron ore agglomerate" has the same meaning expression as "coarse material". The term "powdered iron ore" has the same meaning as "fine-grained matter".
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
1. the water removal effect is good. According to the application, the reciprocating swing type belt machine is adopted, the distribution plate is arranged in the reciprocating swing type belt machine, the materials are in a dispersed sliding state on the distribution plate, the air permeability of the whole reciprocating swing type belt machine is greatly improved, the heat medium is more fully contacted with the iron ore block ore, the heat exchange effect between gas and solid is better, and the moisture in the iron ore block ore can be more effectively reduced.
2. The powder removal rate is high. The distributing plate is provided with sieve holes and a swing driving device. According to the characteristic of strong powder viscosity of the lump mineral materials, the powder in the iron ore lump ore can be efficiently screened out by utilizing the distributing plate with the sieve holes and the swing driving device.
3. In the invention, the heat medium enters from the heat medium inlet at the upper part or the top of the belt conveyor, the belt conveyor is filled with air flow formed by the heat medium from top to bottom and from one side to the other side in the belt conveyor, and the sliding advancing directions of the heat medium and the materials on the distribution plate are opposite, so that the contact of the heat medium and the materials is more uniform, and the drying effect of the materials is improved. Meanwhile, the heat medium can pass through the sieve holes on the distribution plate in the process of being pumped out from top to bottom through the heat medium outlet, namely, the heat medium can bring the fine particle materials attached to the lump ore into the sieve holes, so that the sieving effect of the materials is enhanced.
4. According to the invention, the belt type machine is adopted to dry the iron ore block, the characteristics of arranging the distribution plates with the sieve holes in the belt type machine are utilized, and meanwhile, the iron ore block is screened, and screening and drying are integrated, so that the screening and drying efficiency is improved, the efficiency of the material after being dried is improved, and the drying effect after being screened is better.
5. The method is simple, practical and reliable, fully utilizes the characteristic of sufficient hot waste gas resources of the steel mill, effectively reduces the pretreatment cost of the iron ore lump ore, solves the difficult problem of charging the iron ore lump ore into the furnace, improves the charging proportion and the air permeability level of the blast furnace iron ore lump ore, effectively reduces the production cost of the blast furnace and improves the forward running level of the blast furnace.
Drawings
FIG. 1 is a schematic view of a reciprocating belt conveyor according to the present invention;
FIG. 2 is a schematic diagram of a structure of a reciprocating belt conveyor provided with a first moisture detecting device and a second moisture detecting device;
FIG. 3 is a schematic diagram of a connecting sintering batching system, a blast furnace system and a dust removing system of a reciprocating swing belt conveyor;
FIG. 4 is a schematic view showing the distribution of the screen holes on the distribution plate in the reciprocating swing type belt conveyor of the present invention;
FIG. 5 is a process flow diagram of a reciprocating belt conveyor of the present invention for pre-treating iron ore nuggets;
FIG. 6 is a second process flow diagram of a reciprocating belt conveyor of the present invention for pre-treating iron ore nuggets;
fig. 7 is a third process flow diagram of a reciprocating belt conveyor of the present invention for pretreatment of iron ore nuggets.
Reference numerals:
1: a reciprocating swing belt machine; 101: a distribution plate; 10101: a sieve pore; 102: a horizontal driving device; 103: a swing driving device; 10301: a transmission control shaft; 10302: swinging the traction rope; 10303: a driving device; 104: a thermal medium inlet; 105: a thermal medium outlet; 106: a material inlet; 107: a material outlet; 108: a hood; 109: a bracket; 110: a powder outlet; 201: a first moisture detecting device; 202: a second moisture detecting device; 3: a blast furnace system; 4: a sintering batching system; 5: and a dust removal system.
Detailed Description
The following examples illustrate the technical aspects of the invention, and the scope of the invention claimed includes but is not limited to the following examples.
According to a first embodiment of the present invention, a belt machine of the reciprocating oscillating type is provided.
A reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distributing plate 101, and drives the distributing plate 101 to move along the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing driving device 103 is connected to the distribution plate 101 and drives the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1 or drives the distribution plate 101 to swing in the length direction of the reciprocating swing type belt machine 1. The reciprocating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. The material inlet 106 is arranged at the front end of the distribution plate 101, the material outlet 107 is arranged at the tail end of the distribution plate 101, and the distribution plate 101 is provided with sieve holes 10101.
In the present invention, the reciprocating swing type belt conveyor 1 further includes a hood 108. The distribution plate 101 is disposed in the hood 108, and the heat medium inlet 104 and the heat medium outlet 105 are both disposed in the hood 108.
Preferably, the heat medium inlet 104 is provided at an upper portion or top of the hood 108, and the heat medium outlet 105 is provided at a lower portion or bottom of the hood 108.
It is further preferred that the thermal medium inlet 104 is provided on the hood 108 and above the material outlet 107. The heat medium outlet 105 is provided on the hood 107 and below the material inlet 106.
In the present invention, the reciprocating swing type belt conveyor 1 further includes a bracket 109, and the distribution plate 101 is provided on the bracket 109. The swing driving device 103 comprises a driving device 10303, and the driving device 10303 is connected with the distribution plate 101 through a bracket 109. The driving device 10303 is a servo motor.
Preferably, the swing driving device 103 further includes a transmission control shaft 10301, and the driving device 10303 is connected to the bracket 109 through the transmission control shaft 10301 and drives the bracket 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1 or drives the bracket 109 and the distribution plate 101 to swing in the length direction of the reciprocating swing type belt machine 1.
Preferably, the swing driving device 103 further includes a swing traction rope 10302, and the driving device 10303 is connected to the bracket 109 through the swing traction rope 10302 and drives the bracket 109 and the distribution plate 101 to swing along the width direction of the reciprocating swing type belt machine 1 or drives the bracket 109 and the distribution plate 101 to swing along the length direction of the reciprocating swing type belt machine 1.
In the present invention, the reciprocating swing type belt conveyor 1 further includes a first moisture detecting device 201. A first moisture detection means 201 is provided at the material inlet 106.
Preferably, the reciprocating belt conveyor 1 further comprises a second moisture detecting means 202. A second moisture detection means 202 is provided at the material outlet 107.
In the present invention, the bottom of the reciprocating swing type belt machine 1 is provided with a powder outlet 110.
Preferably, the mesh 10101 has a pore diameter of 5 to 20mm, preferably 6 to 15mm, more preferably 7 to 10mm.
Example 1
As shown in fig. 1 and 4, a reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distributing plate 101, and drives the distributing plate 101 to move along the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing driving device 103 is connected to the distribution plate 101, and drives the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1. The reciprocating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. A material inlet 106 is provided at the front end of the distribution plate 101 and a material outlet 107 is provided at the end of the distribution plate 101. The distribution plate 101 is provided with a sieve aperture 10101.
Example 2
A reciprocating swing type belt machine 1 includes a distribution plate 101, a horizontal driving device 102, and a swing driving device 103. The horizontal driving device 102 is connected to the distributing plate 101, and drives the distributing plate 101 to move along the longitudinal direction of the reciprocating swing type belt conveyor 1. The swing driving device 103 is connected to the distribution plate 101, and drives the distribution plate 101 to swing in the longitudinal direction of the reciprocating swing type belt machine 1. The reciprocating belt conveyor 1 is provided with a heat medium inlet 104, a heat medium outlet 105, a material inlet 106, and a material outlet 107. A material inlet 106 is provided at the front end of the distribution plate 101 and a material outlet 107 is provided at the end of the distribution plate 101. The distribution plate 101 is provided with a sieve aperture 10101.
Example 3
Example 1 is repeated except that the reciprocating belt conveyor 1 further includes a hood 108, the distribution plate 101 is disposed in the hood 108, and the heat medium inlet 104 and the heat medium outlet 105 are both disposed on the hood 108. Wherein the heat medium inlet 104 is provided at the top of the hood 108 and the heat medium outlet 105 is provided at the bottom of the hood 108.
Example 4
Example 3 is repeated except that the heat medium inlet 104 is provided on the hood 108 and above the material outlet 107. The heat medium outlet 105 is provided on the hood 108 and below the material inlet 106.
Example 5
Example 4 is repeated except that the reciprocating swing type belt conveyor 1 further includes a bracket 109, and the distribution plate 101 is provided on the bracket 109. The swing driving device 103 comprises a driving device 10303, and the driving device 10303 is connected with the distribution plate 101 through a bracket 109. The driving device 10303 is a servo motor.
Example 6
Embodiment 5 is repeated except that the swing drive device 103 further includes a transmission control shaft 10301, and the drive device 10303 is connected to the bracket 109 via the transmission control shaft 10301 and drives the bracket 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1.
Example 7
Embodiment 5 is repeated except that the swing driving device 103 further includes a swing pulling rope 10302, and the driving device 10303 is connected to the bracket 109 via the swing pulling rope 10302 and drives the bracket 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1.
Example 8
Example 6 is repeated except that the swing driving device 103 further includes a swing pulling rope 10302, and the driving device 10303 is connected to the bracket 109 via a transmission control shaft 10301 and the swing pulling rope 10302, and drives the bracket 109 and the distribution plate 101 to swing in the width direction of the reciprocating swing type belt machine 1.
Example 9
As shown in fig. 2, example 8 is repeated except that the reciprocating swing type belt conveyor 1 further includes a first moisture detecting device 201. A first moisture detection means 201 is provided at the material inlet 106.
Example 10
Example 9 is repeated except that the reciprocating swing type belt conveyor 1 further includes a second moisture detecting device 202. A second moisture detection means 202 is provided at the material outlet 107.
Example 11
Embodiment 10 is repeated except that the bottom of the reciprocating belt conveyor 1 is provided with a powder outlet 110.
Example 12
Example 11 was repeated except that the mesh diameter of the mesh 10101 was 5mm.
Example 13
Example 11 was repeated except that the mesh diameter of the mesh 10101 was 10mm.
Example 14
A method of a reciprocating oscillating belt conveyor for the pretreatment of iron ore nuggets, the method comprising the steps of:
1) The iron ore agglomerate to be treated is conveyed to the reciprocating belt conveyor 1 and enters from the material inlet 106 and is distributed over the distribution plate 101. The heat medium enters the reciprocating belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore moves along the distribution plate 101 from the material inlet 106 to the material outlet 107. The swing driving device 103 drives the distribution plate 101 to swing reciprocally along the width direction of the reciprocally swinging belt conveyor 1, and the iron ore lump ore is in a sliding state on the distribution plate 101.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by the reciprocating swing type belt conveyor 1. The fine iron ore pieces are screened out through the screen holes 10101 on the distribution plate 101 and then discharged from the powder outlet 110. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet 105.
Example 15
A method of a reciprocating oscillating belt conveyor for the pretreatment of iron ore nuggets, the method comprising the steps of:
1) The iron ore agglomerate to be treated is conveyed to the reciprocating belt conveyor 1 and enters from the material inlet 106 and is distributed over the distribution plate 101. The heat medium enters the reciprocating belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore moves along the distribution plate 101 from the material inlet 106 to the material outlet 107. The swing driving device 103 drives the distribution plate 101 to swing reciprocally along the width direction of the reciprocally swinging belt conveyor 1, and the iron ore lump ore is in a sliding state on the distribution plate 101.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by the reciprocating swing type belt conveyor 1. The fine iron ore pieces are screened out through the screen holes 10101 on the distribution plate 101 and then discharged from the powder outlet 110. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet 105.
4) The granulated iron ore lump ore discharged from the material outlet 107 is transferred to the blast furnace system 3.
5) The powdered iron ore lump ore discharged from the fines outlet 110 is transferred to the sinter batching system 4.
6) The heat medium discharged from the heat medium outlet 105 is delivered to the dust removal system 5.
Example 16
Example 15 is repeated except that in step 1), the moisture content in the treated iron ore lump ore is detected by the first moisture detecting device 201 while the iron ore lump ore to be treated is conveyed to the reciprocating swing type belt conveyor 1.
Example 17
Example 15 is repeated except that in step 3), the moisture content in the granulated iron ore lump ore discharged from the material outlet 107 is detected by the second moisture detecting device 202 while the granulated iron ore lump ore is discharged from the material outlet 107.
Example 18
As shown in fig. 5, a method for preprocessing iron ore lump ore by a reciprocating swing type belt conveyor, the method comprising the steps of:
1) The iron ore agglomerate to be treated is conveyed to the reciprocating belt conveyor 1 and enters from the material inlet 106 and is distributed over the distribution plate 101. The heat medium enters the reciprocating belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore moves along the distribution plate 101 from the material inlet 106 to the material outlet 107. The swing driving device 103 drives the distribution plate 101 to swing reciprocally along the width direction of the reciprocally swinging belt conveyor 1, and the iron ore lump ore is in a sliding state on the distribution plate 101.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by the reciprocating swing type belt conveyor 1. The fine iron ore pieces are screened out through the screen holes 10101 on the distribution plate 101 and then discharged from the powder outlet 110. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet 105.
The moisture content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor 1 is detected by a first moisture detecting device 201 arranged at the material inlet 106 and is marked as W 0 (in%). According to blast furnacesThe upper limit of the water content of lump ore entering the blast furnace is set to W according to the condition requirement max Less than or equal to 4 percent. Calculating the residence time t and h of the iron ore lump ore in the reciprocating swing type belt conveyor 1;
wherein: v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing type belt machine 1, and is at the temperature DEG C; k (k) 1 For the residence time adjustment constant, the value is from 0.1 to 1, preferably from 0.2 to 0.8, more preferably from 0.3 to 0.6. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) The retention time of the iron ore lump ore in the reciprocating swing type belt machine 1 is maintained at t so that the moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt machine 1 is lower than W max 。
Example 19
As shown in fig. 6, a method for preprocessing iron ore lump ore by a reciprocating swing type belt machine, the method comprising the steps of:
1) The iron ore agglomerate to be treated is conveyed to the reciprocating belt conveyor 1 and enters from the material inlet 106 and is distributed over the distribution plate 101. The heat medium enters the reciprocating belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore moves along the distribution plate 101 from the material inlet 106 to the material outlet 107. The swing driving device 103 drives the distribution plate 101 to swing reciprocally along the width direction of the reciprocally swinging belt conveyor 1, and the iron ore lump ore is in a sliding state on the distribution plate 101.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by the reciprocating swing type belt conveyor 1. The fine iron ore pieces are screened out through the screen holes 10101 on the distribution plate 101 and then discharged from the powder outlet 110. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet 105.
The moisture content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor 1 is detected by a first moisture detecting device 201 arranged at the material inlet 106 and is marked as W 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max Less than or equal to 4 percent. Calculating the moving speed S, m/min of the horizontal driving device 102 for driving the distribution plate 101;
wherein: l is the length of the distribution plate 101, m; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing type belt machine 1, and is at the temperature DEG C; k (k) 2 For the movement speed adjustment constant, the value is 1 to 10, preferably 1.25 to 5, more preferably 1.67 to 3.33. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) Under the condition that the moving speed of the horizontal driving device 102 for driving the distributing plate 101 is kept at S, so that the moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 is lower than W max 。
Example 20
As shown in fig. 7, a method for preprocessing iron ore lump ore by a reciprocating swing type belt machine, the method comprising the steps of:
1) The iron ore agglomerate to be treated is conveyed to the reciprocating belt conveyor 1 and enters from the material inlet 106 and is distributed over the distribution plate 101. The heat medium enters the reciprocating belt conveyor 1 from the heat medium inlet 104.
2) The horizontal driving device 102 drives the distribution plate 101 to move along the length direction of the reciprocating swing type belt conveyor 1, and the iron ore lump ore moves along the distribution plate 101 from the material inlet 106 to the material outlet 107. The swing driving device 103 drives the distribution plate 101 to swing reciprocally along the width direction of the reciprocally swinging belt conveyor 1, and the iron ore lump ore is in a sliding state on the distribution plate 101.
3) The iron ore agglomerate to be treated is dried and sieved in a reciprocating oscillating belt conveyor 1. The granulated iron ore lump ore is discharged from the material outlet 107 by the reciprocating swing type belt conveyor 1. The fine iron ore pieces are screened out through the screen holes 10101 on the distribution plate 101 and then discharged from the powder outlet 110. The heat medium exchanges heat with the iron ore lump ore and is discharged from the heat medium outlet 105.
The moisture content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor 1 is detected by a first moisture detecting device 201 arranged at the material inlet 106 and is marked as W 0 (in%). Setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max Less than or equal to 4 percent. The content of the powder ore material in the iron ore lump ore entering the reciprocating swing type belt conveyor 1 is detected and is recorded as M. Calculating the oscillation frequency f of the oscillation driving device 103 for driving the distribution plate 101, and performing sub/min;
wherein: v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing type belt machine 1, and is at the temperature DEG C; k (k) 3 For the wobble frequency adjustment constant, the value is 0.1 to 0.6, preferably 0.2 to 0.5, more preferably 0.25 to 0.4; the powder mineral aggregate is the weight ratio of the mineral aggregate with the particle size smaller than 8mm to the whole iron ore lump ore. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) The swing frequency of the swing driving device 103 driving the distribution plate 101 is kept to be f, so that the moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 is lower than W max And the powder content in the iron ore lump ore is less than 5 percent.
Example 21
Example 18 was repeated except that the heat medium was a sintered ring cooler hot exhaust gas.
Example 22
Example 19 was repeated except that the heat medium was blast furnace hot blast stove off-gas.
Example 23
Example 20 was repeated except that the heat medium was a heat source released by coke oven gas/blast furnace gas/converter gas combustion.
Example 24
Example 23 was repeated except that the temperature of the heat medium entering the reciprocating belt conveyor 1 was greater than 150 ℃.
Application example 1
The method described in example 17 was used in a Zhanjiang iron and steel smeltery, and the first moisture detecting device 201 detected the moisture content in the iron ore lump ore to be treated which entered the reciprocating belt conveyor 1 to be 20%. According to the requirements of blast furnace conditions, the upper limit of the water content of lump ore entering the blast furnace is set to be 4 percent. The residence time t of the iron ore lump ore in the reciprocating oscillating belt conveyor 1 is calculated:
Wherein: v (V) Medium (C) The flow rate of the heating medium was 2m/s. T (T) Medium (C) The temperature at which the heat medium entered the reciprocating belt conveyor 1 was 500 ℃. k (k) 1 The value was 0.4 for the dwell time adjustment constant. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) The residence time of the iron ore lump ore in the reciprocating belt conveyor 1 was maintained at 1.2h so that the moisture content of the granulated iron ore lump ore discharged from the material outlet 107 of the reciprocating belt conveyor 1 was less than 4%.
Application example 2
The method of example 19 was used in a Zhanjiang iron and steel smeltery, and the first moisture detecting device 201 detected the moisture content in the iron ore lump ore to be treated entering the reciprocating belt conveyor 1 to be 12%. According to the requirements of blast furnace conditions, the upper limit of the water content of lump ore entering the blast furnace is set to be 4 percent. Calculating the moving speed S of the horizontal driving device 102 driving the distribution plate 101:
wherein: l is the length of the distribution plate 101, 40m. V (V) Medium (C) Is the flow rate of the heat medium, 3m/s.T Medium (C) The temperature at which the heat medium entered the reciprocating belt conveyor 1 was 400 ℃. k (k) 2 The value of the constant is 2 for the movement speed adjustment. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) The moving speed of the horizontal driving means 102 to drive the distribution plate 101 is maintained at 1.3m/min so that the moisture content of the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 is less than 4%.
Application example 3
The method described in example 20 was used in a Zhanjiang iron and steel smeltery, and the first moisture detecting device 201 detected the moisture content in the iron ore lump ore to be treated entering the reciprocating swing belt conveyor 1 to be 10%. According to the requirements of blast furnace conditions, the upper limit of the water content of lump ore entering the blast furnace is set to be 3 percent. The content of the powder ore material in the iron ore block ore to be treated entering the reciprocating swing type belt conveyor is detected to be 20%. Calculating the wobble frequency f of the wobble driving device 103 driving the distribution plate 101:
wherein: v (V) Medium (C) Is the flow rate of the heat medium, 1.5m/s. T (T) Medium (C) The temperature at which the heat medium enters the reciprocating swing belt conveyor was 300 ℃. k (k) 3 The value of the constant is 0.3 for adjusting the wobble frequency. M is the content of powder mineral materials in the iron ore block ore to be treated entering the reciprocating swing type belt conveyor, wherein the content of the powder mineral materials is the weight ratio of the mineral materials with the particle size smaller than 8mm to the whole iron ore block ore. At a flow rate of the heat medium of V Medium (C) The temperature of the heat medium entering the reciprocating belt conveyor 1 is T Medium (C) The swing frequency of the swing driving device 103 driving the distribution plate 101 is maintained at 12 times/min so that the moisture content in the granular iron ore lump ore discharged from the material outlet 107 of the reciprocating swing type belt conveyor 1 is less than 3% and the powder content in the iron ore lump ore is less than 5%.
The reciprocating swing type belt conveyor provided by the invention is used for preprocessing lump ores, the dried lump ores obtained after preprocessing are conveyed to a blast furnace, and the addition amount of the lump ores can be increased to 30% in raw materials added to the blast furnace. 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 a blast furnace, and the yield of the obtained molten iron can be increased by 10-30% through the blast furnace smelting process.

Claims (23)

1. A method of pretreatment with iron ore nuggets, the method comprising the steps of:
1) Conveying the iron ore block to be treated to a reciprocating swing type belt conveyor (1), and enabling the iron ore block to be treated to enter a material inlet (106) and be distributed on a distribution plate (101); the heat medium enters the reciprocating swing type belt machine (1) from the heat medium inlet (104);
2) The horizontal driving device (102) drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1), and the iron ore blocks move along the distribution plate (101) from the material inlet (106) to the material outlet (107); the swing driving device (103) drives the distribution plate (101) to swing reciprocally along the width direction of the reciprocally swinging type belt conveyor (1) or drives the distribution plate (101) to swing reciprocally along the length direction of the reciprocally swinging type belt conveyor (1), and the iron ore block ore is in a sliding state on the distribution plate (101);
3) Drying and screening iron ore blocks to be treated in a reciprocating swing type belt conveyor (1); the granular iron ore lump ore is discharged from the material outlet (107) through the treatment of the reciprocating swing type belt conveyor (1); the powdery iron ore agglomerate is screened out through the sieve holes (10101) on the distributing plate (101) and then discharged from the powder outlet (110); the heat medium exchanges heat with the iron ore lump ore and is discharged from a heat medium outlet (105);
the reciprocating swing type belt conveyor (1) comprises a distribution plate (101), a horizontal driving device (102) and a swing driving device (103); the horizontal driving device (102) is connected with the distribution plate (101) and drives the distribution plate (101) to move along the length direction of the reciprocating swing type belt conveyor (1); the swing driving device (103) is connected with the distribution plate (101) and drives the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1); the reciprocating swing type belt conveyor (1) is provided with a heat medium inlet (104), a heat medium outlet (105), a material inlet (106) and a material outlet (107); the material inlet (106) is arranged at the front end of the distribution plate (101), and the material outlet (107) is arranged at the tail end of the distribution plate (101); the distribution plate (101) is provided with sieve holes (10101); the bottom of the reciprocating swing belt conveyor (1) is provided with a powder outlet (110).
2. The method according to claim 1, characterized in that: the method further comprises the steps of:
4) The granulated iron ore lump ore discharged from the material outlet (107) is conveyed to the blast furnace system (3); and/or
5) The powdered iron ore lump ore discharged from the powder outlet (110) is transferred to the sintering batching system (4); and/or
6) The heat medium discharged from the heat medium outlet (105) is sent to the dust removal system (5).
3. The method according to claim 1, characterized in that: the reciprocating swing type belt machine (1) further comprises a first moisture detection device (201); the first moisture detection device (201) is arranged at the material inlet (106); in the step 1), when the iron ore lump ore to be treated is conveyed to the reciprocating swing type belt conveyor (1), detecting the moisture content in the iron ore lump ore to be treated through a first moisture detection device (201); and/or
The reciprocating swing type belt machine (1) further comprises a second moisture detection device (202); the second moisture detection device (202) is arranged at the material outlet (107); in step 3), the moisture content of the granulated iron ore lump ore discharged from the material outlet (107) is detected by the second moisture detecting device (202) while the granulated iron ore lump ore is discharged from the material outlet (107).
4. A method according to claim 3, characterized in that: the water content in the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor (1) is detected by a first water content detection device (201) and is marked as W 0 (in%) of the following; setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%) of the following; calculating the residence time t and h of the iron ore block ore in the reciprocating swing type belt conveyor (1);
wherein: v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor (1), and is in DEG C; k (k) 1 The value of the constant is 0.1-1 for the residence time adjustment; at a flow rate of the heat medium of V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor (1) is T Medium (C) The retention time of the iron ore lump ore in the reciprocating swing type belt machine (1) is kept to be t, so that the moisture content of the granular iron ore lump ore discharged from the material outlet (107) of the reciprocating swing type belt machine (1) is lower than W max 。
5. The method according to claim 4, wherein: k (k) 1 The value is 0.2-0.8.
6. The method according to claim 5, wherein: k (k) 1 The value is 0.3-0.6.
7. A method according to claim 3, characterized in that: the water content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor (1) is detected by a first water content detection device (201) and is marked as W 0 (in%) of the following; setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%) of the following; calculating the moving speed S, m/min of the horizontal driving device (102) for driving the distribution plate (101);
wherein: l is the length of the distribution plate (101), m; v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor (1), and is in DEG C; k (k) 2 The value of the constant is 1-10 for adjusting the moving speed;at a flow rate of the heat medium of V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor (1) is T Medium (C) Under the condition that the moving speed of the horizontal driving device (102) for driving the distribution plate (101) is kept at S, so that the moisture content of the granular iron ore lump ore discharged from the material outlet (107) of the reciprocating swing type belt conveyor (1) is lower than W max 。
8. The method according to claim 7, wherein: k (k) 2 The value is 1.25-5.
9. The method according to claim 8, wherein: k (k) 2 The value is 1.67-3.33.
10. A method according to claim 3, characterized in that: the water content of the iron ore lump ore to be treated entering the reciprocating swing type belt conveyor (1) is detected by a first water content detection device (201) and is marked as W 0 (in%) of the following; setting the upper limit of the water content of lump ore entering the blast furnace as W according to the requirements of blast furnace conditions max (in%) of the following; detecting the content of powder mineral materials in the iron ore block ore to be treated entering the reciprocating swing type belt conveyor (1), and marking the content as M,%; calculating the oscillation frequency f, times/min of the oscillation driving device (103) for driving the distribution plate (101);
wherein: v (V) Medium (C) Is the flow rate of the heat medium, m/s; t (T) Medium (C) Is the temperature of the heat medium when entering the reciprocating swing belt conveyor (1), and is in DEG C; k (k) 3 The value of the oscillation frequency adjusting constant is 0.1-0.6; the content of the powder mineral aggregate is that the mineral aggregate with the grain diameter smaller than 8mm accounts for the weight ratio of the whole iron ore lump ore; at a flow rate of the heat medium of V Medium (C) The temperature of the heat medium when entering the reciprocating swing belt conveyor (1) is T Medium (C) Under the condition that the swing frequency of the swing driving device (103) driving the distribution plate (101) is kept to be f, so that the moisture content of the granular iron ore lump ore discharged from the material outlet (107) of the reciprocating swing type belt conveyor (1) is lowAt W max And the powder content in the iron ore lump ore is less than 5 percent.
11. The method according to claim 10, wherein: k (k) 3 The value is 0.2-0.5.
12. The method according to claim 11, wherein: k (k) 3 The value is 0.25-0.4.
13. The method according to any one of claims 1-12, wherein: the heat medium is a heat source generated by the steel process; and/or
The temperature of the heat medium when entering the reciprocating swing type belt machine (1) is higher than 100 ℃; and/or
The air flow speed of the heat medium entering the reciprocating swing type belt conveyor (1) is 0.1-4 m/s.
14. The method according to claim 13, wherein: the heat medium is a heat source released by burning the hot exhaust gas of the sintering circular cooler, the exhaust gas of the blast furnace hot blast stove, the coke oven gas/the blast furnace gas/the converter gas; and/or
The temperature of the heat medium entering the reciprocating swing type belt machine (1) is more than 150 ℃; and/or
The air flow speed of the heat medium entering the reciprocating swing type belt conveyor (1) is 0.3-3 m/s.
15. The method according to claim 14, wherein: the heat medium is sintering circular cooler hot exhaust gas and blast furnace hot blast stove exhaust gas; and/or
The air flow speed of the heat medium entering the reciprocating swing type belt conveyor (1) is 0.5-2 m/s.
16. The method according to any one of claims 1-12, 14-15, wherein: the reciprocating swing type belt conveyor (1) further comprises a hood (108), the distribution plate (101) is arranged in the hood (108), and the heat medium inlet (104) and the heat medium outlet (105) are both arranged on the hood (108).
17. The method according to claim 16, wherein: the heat medium inlet (104) is provided at the upper part or top of the hood (108), and the heat medium outlet (105) is provided at the lower part or bottom of the hood (108).
18. The method according to claim 17, wherein: the heat medium inlet (104) is arranged on the hood (108) and is positioned above the material outlet (107); the heat medium outlet (105) is arranged on the hood (108) and is positioned below the material inlet (106).
19. The method according to claim 16, wherein: the reciprocating swing type belt machine (1) further comprises a bracket (109), and the distribution plate (101) is arranged on the bracket (109); the swing driving device (103) comprises a driving device (10303), and the driving device (10303) is connected with the distribution plate (101) through a bracket (109); the driving device (10303) is a servo motor.
20. The method according to claim 19, wherein: the swing driving device (103) further comprises a transmission control shaft (10301), the driving device (10303) is connected with the bracket (109) through the transmission control shaft (10301) and drives the bracket (109) and the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the bracket (109) and the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1); or alternatively
The swing driving device (103) further comprises a swing traction rope (10302), and the driving device (10303) is connected with the bracket (109) through the swing traction rope (10302) and drives the bracket (109) and the distribution plate (101) to swing along the width direction of the reciprocating swing type belt machine (1) or drives the bracket (109) and the distribution plate (101) to swing along the length direction of the reciprocating swing type belt machine (1).
21. The method according to any one of claims 1-12, 14-15, 17-20, wherein: the pore diameter of the sieve pore (10101) is 5-20mm.
22. The method according to claim 21, wherein: the pore diameter of the sieve pore (10101) is 6-15mm.
23. The method as claimed in claim 22, wherein: the pore diameter of the sieve pore (10101) is 7-10mm.
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