CN105733723A - Coal briquette and manufacturing method thereof - Google Patents
Coal briquette and manufacturing method thereof Download PDFInfo
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- CN105733723A CN105733723A CN201510896436.8A CN201510896436A CN105733723A CN 105733723 A CN105733723 A CN 105733723A CN 201510896436 A CN201510896436 A CN 201510896436A CN 105733723 A CN105733723 A CN 105733723A
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- moulded coal
- coal
- heat absorption
- mixture
- gasification furnace
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/105—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with a mixture of organic and inorganic binders
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
- C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
- C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
Abstract
The invention provides a coal briquette and a manufacturing method thereof. According to the technical scheme of the invention, the dome top part of a smelting gasifier is loaded into a molten iron manufacturing apparatus and then is quickly heated for the manufacture of coal briquettes. The molten iron manufacturing apparatus comprises a smelting gasifier used for loading the reduced iron, and a reduction furnace connected with the smelting gasifier and used for suppying the reduced iron. The coal briquette manufacturing method comprises the steps of providing a mixture of the raw material coal and a binder; coating the heat-absorbing material on the surfaces of a pair of forming rollers for forming the mixture; and feeding the mixture into the space between the pair of forming rollers so as to compress and mold the mixture by means of the forming rollers. In this way, coal briquettes coated with the heat-absorbing material are obtained. During the coating process of the heat-absorbing material, the heat-absorbing material is composed of more than one materials selected from a metal hydroxide, limestone and dolomite.
Description
Technical field
The present invention relates to a kind of moulded coal and manufacture method thereof.More particularly it relates to an because be coated with heat absorption material and load melting gasification furnace time not easily by the moulded coal of efflorescence and manufacture method thereof.
Background technology
Melting reduction iron-smelting method uses the reduction furnace that iron ore is reduced and the iron ore being reduced is carried out the melting gasification furnace of melting.When iron ore is carried out melting by melting gasification furnace, using moulded coal as smelting iron Ore thermal source load melting gasification furnace.Reduced iron in melting gasification furnace smelting become molten iron and slag after discharge.The moulded coal loading melting gasification furnace forms coal packed bed.Being blown into oxygen by the air port being arranged on melting gasification furnace makes coal packed bed burn, and then generates burning gases.Burning gases are risen by coal packed bed, and are transformed into high-temperature reducing gas.High-temperature reducing gas is expelled to outside melting gasification furnace, and is fed to reduction furnace as reducing gas.
The moulded coal loading melting gasification furnace runs into the high-temperature gas of melting top of gasification furnace easily by efflorescence.If moulded coal high temperature efflorescence, melting cannot be provided to be positioned at the combustion heat needed for the reduced iron bottom melting gasification furnace.Accordingly, it would be desirable to use substantial amounts of moulded coal, thus can cause that fuel cost rises, also can cause that the breathability in melting gasification furnace is deteriorated because the fine coal in melting gasification furnace increases.
Summary of the invention
Technical problem
It is an object of the invention to provide a kind of when loading melting gasification furnace not easily by the moulded coal of efflorescence.The present invention also aims to provide the manufacture method of a kind of described moulded coal.
Technical scheme
The present invention relates to the manufacture method of a kind of moulded coal being rapidly heated behind the dome portion of loading melting gasification furnace in ferrum water making device, this ferrum water making device includes loading the melting gasification furnace of reduced iron and being connected and provide the reduction furnace of reduced iron with melting gasification furnace.The manufacture method of the moulded coal according to an embodiment of the invention includes: step S10, it is provided that the mixture that feed coal and binding agent mix；Step S20, is coated in the surface of a pair format roll for forming mixture by heat absorption material；And step S30, mixture is sent between a pair format roll, by a pair format roll, mixture is compressed molding, to provide the moulded coal with heat absorption coating substance.
In the step of coating heat absorption material, heat absorption material can be more than one materials in metal hydroxides, limestone and dolomite.
Heat absorption amount of substance can be the 3wt% to 15wt% of moulded coal.More specifically, heat absorption amount of substance can be the 4wt% to 8wt% of moulded coal.
In the step providing mixture, binding agent can be more than one materials in molasses, raw sugar, cellulose, starch and Colophonium (bitumen).
In the step providing mixture, the amount of the fine coal with below 5mm granularity being contained in feed coal can be 90wt% to 100wt%.
In the step of coating heat absorption material, the surface of a pair format roll can remain room temperature.
In the step providing mixture, mixture can comprise the binding agent of 3wt% to 15wt% and the feed coal of surplus.
The present invention relates to a kind of moulded coal being rapidly heated behind the dome portion of loading melting gasification furnace in ferrum water making device, this ferrum water making device includes loading the melting gasification furnace of reduced iron and being connected and provide the reduction furnace of reduced iron with melting gasification furnace.Moulded coal according to an embodiment of the invention comprises feed coal and binding agent mixes mixture and the heat absorption material of application of mixture.
Heat absorption material can be more than one materials in metal hydroxides, limestone and dolomite.
Heat absorption amount of substance can be the 3wt% to 15wt% of moulded coal.More specifically, heat absorption amount of substance can be the 4wt% to 8wt% of moulded coal.
Mixture can comprise the binding agent of 3wt% to 15wt% and the feed coal of surplus.
Beneficial effect
Moulded coal owing to being coated with heat absorption material loads melting gasification furnace, thus moulded coal is not easily by efflorescence in melting gasification furnace.Therefore, it can the combustion heat needed for fully providing for smelting reduction ferrum and reduce fuel cost, it is also possible to improve the breathability in melting gasification furnace.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the moulded coal manufacture method according to an embodiment of the invention.
Fig. 2 is the surface configuration photo of the moulded coal forming semicoke at the temperature of various high-temperature gases.
Fig. 3 is the sectional perspective schematic diagram of the shaped device manufacturing moulded coal in Fig. 1.
Fig. 4 is the schematic cross-section of the shaped device of the IV-IV line along Fig. 3.
Fig. 5 is the schematic diagram of the ferrum water making device using the moulded coal manufactured in Fig. 1.
Fig. 6 is the schematic diagram of another ferrum water making device using the moulded coal manufactured in Fig. 1.
Detailed description of the invention
The terms first, second, third, etc. are used for describing various part, composition, region, layer and/or section, but these parts, composition, region, layer and/or section should not be limited by these terms.These terms are only used for distinguishing certain part, composition, region, layer and/or section and another part, composition, region, layer and/or section.Therefore, without departing from the scope of the present invention, Part I described below, composition, region, layer and/or section can also be described as Part II, composition, region, layer and/or section.
Term as used herein is simply not intended to the restriction present invention for describing particular implementation.Unless separately provided substantially contrary implication in context, otherwise singulative used herein is also intended to include plural form.It should also be understood that, term " includes " and " comprising " is not refer specifically to some characteristic, field, integer, step, action, key element and/or composition, and gets rid of the existence of other characteristics, field, integer, step, action, key element, composition and/or group or additional.
Although separately not defining, but the implication of all terms used herein (including technical term and scientific terminology) and those skilled in the art be generally understood that equivalent in meaning.For there being the term of definition inside dictionary, it should be interpreted as having the meaning consistent with correlation technique document and content disclosed herein, and should not explain their meaning with idealization or excessively formal implication.
Below, the embodiment that present invention will be described in detail with reference to the accompanying, so that those skilled in the art easily implements the present invention.The present invention can implement in a variety of different ways, it is not limited to following embodiment.
Fig. 1 is the schematic flow sheet of the moulded coal manufacture method according to an embodiment of the invention.The flow chart of the moulded coal manufacture method of Fig. 1 is only intended to illustrate the present invention, the invention is not limited in this.Therefore, the manufacture method of moulded coal can be carried out various deformation.
As it is shown in figure 1, the manufacture method of moulded coal includes: step S10, it is provided that the mixture that feed coal and binding agent mix；Step S20, is coated in the surface of a pair format roll for forming mixture by heat absorption material；And step S30, mixture is sent between a pair format roll, by a pair format roll, mixture is compressed molding, to provide the moulded coal with heat absorption coating substance.Additionally, the manufacture method of moulded coal can also include other steps.
First, in step slo, it is provided that the mixture that feed coal and binding agent mix.Fine coal can be used as feed coal.Want to reduce mass deviation, it is desirable to fine coal has certain granularity, as concrete standard, the fine coal accounting for 90wt% to 100wt% that granularity can be used to be below 5mm.
The water quantities being mixed in fine coal can remain 2wt% to 12wt%.The water quantities being mixed in fine coal is controlled when described scope, moisture can block the pore of pulverized coal particle just, its result binding agent cannot penetrate into and be present in outside pulverized coal particle in pulverized coal particle, make to be combined with each other well between pulverized coal particle such that it is able to be effectively improved calorific intensity and the cold strength of moulded coal.Molasses, raw sugar, cellulose, starch or Colophonium (bitumen) etc. can be used as binding agent.The combined amount of binding agent can be the 3wt% to 15wt% of mixture.If the amount of binding agent is very few, then the intensity of moulded coal may be deteriorated.And, if the amount of binding agent is too much, then can produce the problems such as adhesion when fine coal and binding agent mixing.Therefore, the amount of binding agent is controlled in described scope.
It addition, mixture also can comprise the firming agent of 1wt% to 5wt%.Quick lime, slaked lime, calcium carbonate, cement, bentonite, clay or limestone etc. can be used as firming agent.If the amount of firming agent is very few, then will not produce the chemical bond of binding agent and firming agent fully, it is impossible to substantially ensure that the intensity of moulded coal.And, if the amount of firming agent is too much, then the ash in moulded coal becomes many, can not play sufficient effect as fuel in melting gasification furnace.Therefore, the amount of firming agent is controlled in described scope.When using molasses as binding agent and use quick lime or slaked lime as firming agent, it is desirable to after first firming agent being uniformly mixed into fine coal, add molasses.Now, the cold strength that can improve the moulded coal manufactured in subsequent technique is combined by sugar lime.
Referring again to Fig. 1, in step S20, heat absorption material is coated in the surface of a pair format roll for forming mixture.Metal hydroxides, limestone or dolomite can be used as heat absorption material.Aluminium hydroxide or magnesium hydroxide can be used as metal hydroxides.Heat absorption material is coated on moulded coal surface at following step S30.Manufactured moulded coal is loaded into melting gasification furnace when reacting, it is coated on the heat absorption material generation endothermic reaction on moulded coal surface, moulded coal surface is made to become low-temperature region partly, its result reduces reaction temperature, thus the particle diameter of semicoke (chard) becomes big, face crack quantity reduces, and can reduce from the quantity of the semicoke of unit moulded coal separation.To this, illustrated in more detail by Fig. 2.
After moulded coal loads melting gasification furnace, the high-temperature gas owing to rising from the bottom of melting gasification furnace is pyrolyzed in half coke bed (charbed) top and forms semicoke.Now, surface configuration and the mean diameter of moulded coal semicoke are produced a very large impact by the temperature making the high-temperature gas of moulded coal pyrolysis.
Fig. 2 forms the surface configuration photo of the moulded coal of semicoke when illustrating the temperature respectively 900 DEG C, 1000 DEG C, 1100 DEG C of high-temperature gas.At 900 DEG C, the surface picture of the moulded coal of semicoke is formed shown in (a) of Fig. 2, at 1000 DEG C, form the surface picture of the moulded coal of semicoke shown in (b) of Fig. 2, at 1100 DEG C, shown in (c) of Fig. 2, form the surface picture of the moulded coal of semicoke.
As in figure 2 it is shown, the particle diameter of the more low moulded coal semicoke of reaction temperature is more big, and demonstrate the quantity minimizing of face crack and the trend of the quantity minimizing from the semicoke of unit moulded coal separation.
Moulded coal according to an embodiment of the invention is coated with heat absorption material in its surface, therefore when loading melting gasification furnace, the heat absorption material generation endothermic reaction, moulded coal surface is made to become low-temperature region partly, its result reduces the reaction temperature of moulded coal, thus the particle diameter of semicoke becomes big, the quantity of face crack reduces, and can reduce from the quantity of the semicoke of unit moulded coal separation.
There is the endothermic reaction and dehydration in heat absorption material and aluminium hydroxide, the endothermic reaction and dehydration occur magnesium hydroxide at about 330 DEG C at 180 DEG C to 220 DEG C.It addition, the endothermic reaction and calcination occur limestone at about 900 DEG C, there is the endothermic reaction and a calcination and the endothermic reaction and after baking reaction occur at about 900 DEG C in dolomite at 650 DEG C to 750 DEG C.Moulded coal surface can be made to become low-temperature region partly by this endothermic reaction.
During coating heat absorption material, the surface of a pair format roll remains room temperature.More specifically, the surface temperature of a pair format roll can be remained 20 DEG C to 30 DEG C.It is highly preferred that the surface temperature of a pair format roll can be remained 25 DEG C.If the surface temperature of format roll is too high, then heat absorption material may be gasified before being coated on moulded coal surface.
Finally, in step s 30, mixture is sent between a pair format roll, by a pair format roll, mixture is compressed molding, to provide the moulded coal with heat absorption coating substance.Now, the heat absorption amount of substance being applied can be the 3wt% to 15wt% of moulded coal.If heat absorption amount of substance is very few, then easily by efflorescence after moulded coal loading melting gasification furnace.And, if heat absorption amount of substance is too much, then heat absorption material will not be coated on moulded coal well and remain in outside.Therefore, heat absorption amount of substance is controlled in described scope.More specifically, heat absorption amount of substance can be 4wt% to 8wt%.
Fig. 3 schematically shows the shaped device 100 for manufacturing moulded coal of Fig. 1.Fig. 3 is illustrated as forming roll 11,12 partly, for the ease of illustrating to eliminate other parts.
Mixture is sent between a pair format roll 11,12 being coated with heat absorption material 10.The groove 111,121 of a pair format roll 11,12 is coated with heat absorption material 10.Therefore, it is compressed molding by 11,12 pairs of mixture of a pair format roll and manufactures the moulded coal with heat absorption material 10 coating.For compressed mixture, suitably applying pressure by a pair format roll 11,12, thus absorbed heat in the surface of moulded coal, material 10 is coated with well.
Fig. 4 schematically shows the cross section structure of the shaped device 100 of the IV-IV line along Fig. 3.More specifically, Fig. 4 is shown through shaped device 100 manufactures the process of the moulded coal being coated with heat absorption material 10.
As shown in Figure 4, from the nozzle injection heat absorption material 10 being located at above the both sides of a pair format roll 11,12, its result heat absorption material 10 is respectively coated in the groove 111,121 of a pair format roll 11,12 that mutual opposite direction rotates.
11,12 pairs of mixture sent into therebetween of a pair format roll are compressed molding.Therefore, heat absorption material 10 can be uniformly coated with by the surface of the moulded coal of a pair format roll 11,12 compression, such that it is able to produce the moulded coal being coated with heat absorption material.
Fig. 5 schematically shows the ferrum water making device 200 using the moulded coal manufactured in Fig. 1.The structure of the ferrum water making device 200 of Fig. 5 is only intended to illustrate the present invention, the invention is not limited in this.Therefore, the ferrum water making device 200 of Fig. 5 can be deformed into variously-shaped.
As it is shown in figure 5, ferrum water making device 200 includes melting gasification furnace 210, fluidized bed type reduction furnace 222, reduced iron compressor 240 and compression reduced iron accumulator tank 250, wherein compression reduced iron accumulator tank 250 can omit.
Manufactured moulded coal is loaded into melting gasification furnace 210, is internally formed coal packed bed at melting gasification furnace 210.Moulded coal produces reducing gas at melting gasification furnace 210, and produced reducing gas is fed to fluidized bed type reduction furnace 222.Powder Supply of iron ore is to multiple fluidized bed type reduction furnaces 222 with fluid bed, and manufactures reduced iron by being fed to the reducing gas of fluidized bed type reduction furnace 222 from melting gasification furnace 210 and carrying out flowing.After reduced iron is reduced ferrum compressor 240 compression, it is stored in compression reduced iron accumulator tank 250.The reduced iron compressed is fed to melting gasification furnace 210 from compression reduced iron accumulator tank 250, is smelted into molten iron in melting gasification furnace 210.
The top of melting gasification furnace 210 is formed with dome portion 201.That is, form wider space relative to other parts of melting gasification furnace 210, there is high-temperature reducing gas in this space.Therefore, the moulded coal loading dome portion 201 is likely to easily by efflorescence due to high-temperature reducing gas.It is to say, moulded coal is devoted to the top of the melting gasification furnace being maintained at 1000 DEG C, so violent thermal shock can be subject to.Therefore, moulded coal is likely to by efflorescence when dropping to the bottom of melting gasification furnace.
But, owing to being coated with heat absorption material by the moulded coal of the method manufacture of Fig. 1, so heat absorption material reduces the temperature on moulded coal surface partly by the endothermic reaction.Therefore, moulded coal by efflorescence, and will not drop to the bottom of melting gasification furnace 210 in the dome portion 201 of melting gasification furnace 210.The semicoke generated by the pyrolytic reaction of moulded coal is moved to the bottom of melting gasification furnace 210 and carries out exothermic reaction with the oxygen supplied by air port 230, and its result moulded coal can serve as the thermal source that melting gasification furnace 210 remains high temperature.It addition, semicoke provides breathability, therefore produce a large amount of gases in the bottom of melting gasification furnace 210, and the coal packed bed flowing uniformly across in melting gasification furnace 210 can be easier to from the reduced iron of fluidized bed type reduction furnace 222 supply.
Except aforesaid moulded coal, it is also possible to as required bulk carbonaceous material or coke are loaded melting gasification furnace 210.It is blown into oxygen by arranging air port 230 at the outer wall of melting gasification furnace 210.Oxygen is blown into coal packed bed and forms combustion zone.Moulded coal can produce reducing gas in combustion zone burning.
Fig. 6 schematically shows another ferrum water making device 300 using the moulded coal manufactured in Fig. 1.The structure of the ferrum water making device 300 of Fig. 6 is only intended to illustrate the present invention, the invention is not limited in this.Therefore, the ferrum water making device 300 of Fig. 6 can be deformed into variously-shaped.The structure of the ferrum water making device 300 of Fig. 6 is similar with the structure of the ferrum water making device 200 of Fig. 5, and thus like part adopts identical accompanying drawing labelling, and omits the detailed description to this part.
The ferrum water making device 300 of Fig. 6 includes melting gasification furnace 210 and packed bed type reduction furnace 220.In addition, ferrum water making device 300 can also include other devices as required.Iron ore loading packed bed type reduction furnace 220 is reduced.The iron ore of loading packed bed type reduction furnace 220 manufactures reduced iron through packed bed type reduction furnace 220 after being dried in advance.Packed bed type reduction furnace 220 receives reducing gas from melting gasification furnace 210 and is being internally formed packed bed.
Below, example illustrates in greater detail the present invention by experiment.These experimental examples are only intended to illustrate the present invention, the invention is not limited in this.
Experimental example 1
Preparing as feed coal to have mean behaviors and have the coal charge A of granularity of below 5mm, the characteristic of the coal charge A used is shown below in 1.
[table 1]
Add the molasses of 8 weight portions as binding agent after, coal charge A and molasses are mixed equably.As heat absorption coating substance limestone on the surface of a pair format roll, coated weight is 6.2 weight portions of moulded coal.The mixture of coal charge A and molasses is sent between a pair format roll being coated with heat absorption material and be compressed, to manufacture pillow moulded coal 100 weight portion of 64.5mm × 25.4mm × 19.1mm size.
Experimental example 2
As heat absorption coating substance dolomite 6.5 weight portion on the surface of a pair format roll.Other experimentations are identical with aforesaid experimental example 1.
Comparative example 1
The surface of a pair format roll is not coated with heat absorption material.Other experimentations are identical with aforesaid experimental example 1.
Comparative example 2
The mixture of coal charge A and molasses is mixed into as firming agent limestone 2 weight portion further, and the surface of a pair format roll is not coated with heat absorption material.Other experimentations are identical with aforesaid experimental example 1.
Moulded coal physical property evaluation is tested
In order to the moulded coal manufactured according to aforesaid experimental example 1, experimental example 2 and comparative example 1 and comparative example 2 is evaluated, a moulded coal loading temperature is maintained in the rapid heating furnace of 1000 DEG C and carries out heat treatment, after 15 minutes, obtain semicoke.By the total block data of obtained semicoke and wherein particle diameter be that the ratio of the block of more than 13mm arranges in table 2 below.
[table 2]
As shown in table 2, reduce to some extent relative to the total block data of the semicoke produced in the moulded coal manufactured according to comparative example 1 and comparative example 2 according to the total block data of the semicoke produced in the moulded coal that experimental example 1 manufactures, and the ratio of the block that particle diameter is more than 13mm increases to some extent.It addition, reduce to some extent relative to the total block data of the semicoke produced in the moulded coal according to comparative example manufacture according to the total block data of the semicoke produced in the moulded coal of experimental example 2 manufacture, and the ratio of the block that particle diameter is more than 13mm increases to some extent.
As it has been described above, according to the moulded coal of an embodiment of the invention at melting gasification furnace not easily by efflorescence, it is possible to the combustion heat needed for fully providing for smelting reduction ferrum and reduce fuel cost, it is also possible to improve the breathability in melting gasification furnace.
Describe the present invention as mentioned above, but those skilled in the art would readily recognize that in the idea of the invention claimed in without departing from claims and scope and can carry out various modifications and changes.
Symbol description
10. heat absorption material
11,12. format roll
111,121. groove
100. shaped device
210. melting gasification furnace
220. packed bed type reduction furnace
222. fluidized bed type reduction furnace
230. air port
240. reduced iron compressor
250. compression reduced iron accumulator tank
200,300. ferrum water making device
201. dome portion
Claims (11)
1. the manufacture method of a moulded coal, described moulded coal is rapidly heated after loading the dome portion of melting gasification furnace in ferrum water making device, described ferrum water making device includes loading the described melting gasification furnace of reduced iron and being connected and provide the reduction furnace of described reduced iron with described melting gasification furnace, and the manufacture method of described moulded coal comprises the following steps:
The mixture that feed coal and binding agent mix is provided；
Heat absorption material is coated in the surface of a pair format roll for mixture described in molding；And
Described mixture is sent between the pair of format roll, by the pair of format roll, described mixture is compressed molding, with the offer moulded coal of described heat absorption coating substance,
Wherein, in the step being coated with described heat absorption material, described heat absorption material is more than one materials in metal hydroxides, limestone and dolomite.
2. the manufacture method of moulded coal according to claim 1, wherein,
Described heat absorption amount of substance is the 3wt% to 15wt% of described moulded coal.
3. the manufacture method of moulded coal according to claim 2, wherein,
Described heat absorption amount of substance is the 4wt% to 8wt% of described moulded coal.
4. the manufacture method of moulded coal according to claim 1, wherein,
In the step providing described mixture, described binding agent is more than one materials in molasses, raw sugar, cellulose, starch and Colophonium.
5. the manufacture method of moulded coal according to claim 1, wherein,
In the step providing described mixture, the amount of the fine coal with below 5mm granularity being contained in described feed coal is 90wt% to 100wt%.
6. the manufacture method of moulded coal according to claim 1, wherein,
In the step being coated with described heat absorption material, the surface of the pair of format roll is remained room temperature.
7. the manufacture method of moulded coal according to claim 1, wherein,
In the step providing described mixture, described mixture comprises the binding agent of 3wt% to 15wt% and the feed coal of surplus.
8. a moulded coal, described moulded coal is rapidly heated after loading the dome portion of melting gasification furnace in ferrum water making device, described ferrum water making device includes loading the described melting gasification furnace of reduced iron and being connected with described melting gasification furnace and provide the reduction furnace of described reduced iron, described moulded coal comprises feed coal and binding agent mixes mixture and the heat absorption material being coated with described mixture
Wherein, described heat absorption material is more than one materials in metal hydroxides, limestone and dolomite.
9. moulded coal according to claim 8, wherein,
Described heat absorption amount of substance is the 3wt% to 15wt% of described moulded coal.
10. moulded coal according to claim 9, wherein,
Described heat absorption amount of substance is the 4wt% to 8wt% of described moulded coal.
11. moulded coal according to claim 8, wherein,
Described mixture comprises the binding agent of 3wt% to 15wt% and the feed coal of surplus.
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| CN105733723B (en) | 2018-10-19 |
| KR20160078181A (en) | 2016-07-04 |
| KR101676629B1 (en) | 2016-11-16 |
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