CN101445868B - Technique for proportioning different materials in steel plant - Google Patents

Technique for proportioning different materials in steel plant Download PDF

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Publication number
CN101445868B
CN101445868B CN2008102386881A CN200810238688A CN101445868B CN 101445868 B CN101445868 B CN 101445868B CN 2008102386881 A CN2008102386881 A CN 2008102386881A CN 200810238688 A CN200810238688 A CN 200810238688A CN 101445868 B CN101445868 B CN 101445868B
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China
Prior art keywords
ash
dust
addition
steel plant
humidification
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Expired - Fee Related
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CN2008102386881A
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Chinese (zh)
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CN101445868A (en
Inventor
曾晖
薛庆国
李建云
王静松
郭强
佘雪峰
霍天喜
罗霞光
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Laiwu Iron and Steel Group Co Ltd
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Laiwu Iron and Steel Group Co Ltd
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Priority to CN2008102386881A priority Critical patent/CN101445868B/en
Publication of CN101445868A publication Critical patent/CN101445868A/en
Application granted granted Critical
Publication of CN101445868B publication Critical patent/CN101445868B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention relates to a technique for proportioning different materials in a steel plant. A proportioning room adopts a set of system A and a set of system B to proportion, wherein, the A system is mainly used for adding fine dry mash such as ferriferous dust; and the B system is mainly used for adding wet materials with less 13% water, or wet materials and auxiliary raw materials such as powder coal. The invention thoroughly solves the problem of dust dispersion in the proportioning process due to the dust with different properties, and the device layout of a workshop is more flexible simultaneously.

Description

The distribution of a kind of Steel Plant different material
Technical field
The invention belongs to steel industry agglomerate, pellet, metallized pellet production technical field, be specifically related to a kind of handle Steel Plant's different performance material with addition of technology.
Background technology
Iron and steel enterprise for example sintering plant or other handles in the dust factory and generally adopts with addition of system for raw material: several high hoppers are arranged in a row (a kind of raw material only is housed in each feed bin), raw material passes through disk feeder or screw feeder from feed bin, on even in proportion shakedown to the movable proportioning belt, the terminal point of belt is delivered to Preblend system PBS with mixture, and promptly different materials is delivered to blending device and carried out mixing.
Have the following disadvantages with addition of technology for the raw material that generally uses like this:
(1) in the direct reducing process of rotary hearth furnace of handling iron and steel enterprise's dust, for guaranteeing the quality product stable performance, the dust that each operation produces must carry out separately with addition of, nearly 5~10 kinds of dust kinds, if consider standby feed bin again, these feed bins processing set-up in one line can be very long, proportioning belt is very long, workshop building is also very long simultaneously, not only causes the proportioning belt running resistance excessive, and for the addressing of plant area strict (factory site that needs strip); No matter which place goes wrong the batching transfer system will cause total system not use, and reduces the operating rate of feed proportioning system.
(2) the material performance of dust, dirt mud and the auxiliary material (as coal dust, binding agent etc.) of each operation generation of iron and steel enterprise has nothing in common with each other, for example the thin ash of blast furnace dry method dust ash, converter dry ash, converter environmental dust removal ash and coking part dedusting ash equigranular more carefully account for more than 80% at-200 orders, and easily produce airborne dust in the process and add problem such as water difficulty; And material-mud water content such as converter mud and rolling line mud are big and storage period long easy caking.Can make proportioning belt produce a large amount of airborne dusts and be difficult on the adding proportioning belt and control, the general way that solves is to adopt to join siccative after joining wet feed earlier, joins powder after joining the piece material earlier, joins the little material of density after joining the big material of density earlier, but airborne dust is still serious, is difficult to be effectively controlled.
Summary of the invention
In order to overcome reentrainment of dust and the long problem of transmission route that iron and steel enterprise's different performance raw material produces in the process, the invention provides the ingredients technical of a kind of Steel Plant different performance material, the raw material that can effectively handle Steel Plant's dust with addition of.
Technical solution of the present invention is as follows:
Proportioning room adopts A, B two cover systems to prepare burden, wherein the A system be mainly used in the fine fraction dry mash with addition of; The B system be mainly used in moisture below 13% wet feed or wet feed and auxiliary material with addition of.
Described A system distribution line with addition of the fine fraction dry mash from feed bin, measure, prepare burden by screw feeder, the material that screw feeder comes out enters airtight scraper plate machine, is delivered to bucket elevator by the scraper plate machine, enters mixer through bucket elevator again.Adopt the two-stage humidification in the described A system; The one-level humidification is to adopt the mode of water spray that material is carried out humidification in above-mentioned screw feeder, makes material moisture reach 2~6%wt; The secondary humidification is to adopt the mode of vertical material water spray that material is carried out humidification in the chute before mixer, makes material moisture reach 5~8%wt.Described B system distribution line with addition of wet feed from feed bin by adopting the disk feeder blanking, after the belted electronic balance weighing, drop down onto belt conveyor, be delivered to mixer by belt conveyor.
In the method for the present invention, the B system with addition of wet feed be coal dust, the smart powder in choosing back and/or rolling line mud, auxiliary material is generally the steel rolling iron sheet.But be not limited thereto.
In the method for the present invention, the A system with addition of the fine fraction dry mash be iron dust containing and/or powder binder, described iron dust containing is generally the thin ash of blast furnace dust, blast furnace environmental dust removal ash, converter, converter environmental dust removal ash, coking dedusting ash and/or electric furnace ash.But be not limited thereto.
In the method for the present invention, the feed bin number of A, B two systems can increase or delete according to actual needs.Different raw materials places in separately the feed bin, is convenient to metering, batching.
Preferably, adopt air conveying mode with dry dust suction feed bin from airtight strength tank car in the described A system, Cang Ding establishes fly-ash separator.
Beneficial effect of the present invention is as follows:
The present invention has thoroughly solved because the airborne dust problem of dust in blending process of various trait; Make that simultaneously the processing set-up in workshop is more flexible, adapt to difform factory site with the angle of adjusting belt.This method can effectively shorten the length of factory building or utilize irregular factory site to build proportioning room, simultaneously can be according to different performance with addition of raw material, with the conveying of classifying of different type of transmission, and can carry out humidification to material, help strengthening in the blending process control of airborne dust at suitable position.
Description of drawings
Fig. 1 is a process flow sheet of the present invention, can adjust the particular location of A, B two cover systems according to practical situation.
Embodiment
The ingredients technical of embodiment 1. Steel Plant's different performance materials
Feed proportioning system adopts A, B two cover systems, and wherein the A system is used to carry blast furnace dust, blast furnace environmental dust removal ash, the thin ash of converter, converter environmental dust removal ash and electric furnace ash; The B system is used for pulverized coal conveying, the choosing smart powder in back and rolling line mud.Described A system distribution line with addition of various dry mash from feed bin separately, measure, prepare burden by screw feeder respectively, in above-mentioned screw feeder, adopt the mode of water spray that material is carried out humidification, make material moisture reach 2~6%wt; The material that screw feeder comes out enters airtight scraper plate machine, be delivered to bucket elevator by the scraper plate machine, enter mixer through bucket elevator again, adopt the mode of vertical material water spray that material is carried out humidification in the chute before entering mixer, make material moisture reach 5~8%wt.Described B system distribution line with addition of wet feed from feed bin separately by using the disk feeder blanking respectively, after the belted electronic balance weighing, drop down onto belt conveyor, be delivered to mixer by belt conveyor.Two cover system horizontal parallel are put, by two cover systems after the charge calculation according to being that certainty ratio is delivered to mixer respectively with various raw materials.Wherein the powder of A system easily produces reentrainment of dust, on its next door high-power dusting machine is set; Factory director's degree direction can shorten 50% simultaneously, and width widens 50%.
Embodiment 2. is as described in the embodiment 1, and different is:
Feed proportioning system adopts A, B two cover systems, and wherein the A system is used to carry blast furnace dust, coking dedusting ash, the thin ash of converter, converter environmental dust removal ash and electric furnace ash; The B system is used to carry rolling line mud and steel rolling iron sheet (auxiliary material).Two cover system laid parallels, by two cover systems after the charge calculation according to being that certainty ratio is delivered to mixer respectively with various raw materials.Wherein the powder of A system easily produces reentrainment of dust, adopts air conveying mode with dry dust suction feed bin from airtight strength tank car, and Cang Ding establishes fly-ash separator; Factory director's degree direction can shorten 50% simultaneously, and width widens 50%.
Embodiment 3. is as described in the embodiment 1, and different is:
Feed proportioning system adopts A, B two cover systems, and wherein the A system is used to carry coking dedusting ash, blast furnace environmental dust removal ash, the thin ash of converter, converter environmental dust removal ash and electric furnace ash; The B system is used for pulverized coal conveying, steel rolling iron sheet and rolling line mud.Two cover systems are vertically put, by two cover systems after the charge calculation according to being that certainty ratio is delivered to mixer respectively with various raw materials.Wherein the powder of A system easily produces reentrainment of dust, adopts air conveying mode with dry dust suction feed bin from airtight strength tank car, and Cang Ding establishes fly-ash separator; Factory director's degree design simultaneously can utilize two bar shaped factory sites that become 90 ° without square space.

Claims (4)

1. the distribution of Steel Plant's different material is characterized in that proportioning room adopts A, B two cover systems to prepare burden, wherein the A system be mainly used in the fine fraction dry mash with addition of; The B system be mainly used in moisture below 13% wet feed or wet feed and auxiliary material with addition of;
Described A system distribution line with addition of the fine fraction dry mash from feed bin, measure, prepare burden by screw feeder, the material that screw feeder comes out enters airtight scraper plate machine, is delivered to bucket elevator by the scraper plate machine, enters mixer through bucket elevator again; Adopt the two-stage humidification in the described A system: the one-level humidification is to adopt the mode of water spray that material is carried out humidification in above-mentioned screw feeder, makes material moisture reach 2~6wt%; The secondary humidification is to adopt the mode of vertical material water spray that material is carried out humidification in the chute before mixer, makes material moisture reach 5~8wt%;
Described B system distribution line with addition of wet feed or wet feed and auxiliary material from feed bin by adopting the disk feeder blanking, after the belted electronic balance weighing, drop down onto belt conveyor, be delivered to mixer by belt conveyor.
2. the distribution of Steel Plant as claimed in claim 1 different material, it is characterized in that described A system with addition of the fine fraction dry mash be iron dust containing and/or powder binder.
3. the distribution of Steel Plant as claimed in claim 2 different material is characterized in that described iron dust containing is blast furnace dust, blast furnace environmental dust removal ash, the thin ash of converter, converter environmental dust removal ash, coking dedusting ash and/or electric furnace ash.
4. the distribution of Steel Plant as claimed in claim 1 different material is characterized in that adopting in the A system air conveying mode with dry dust suction feed bin from airtight strength tank car, and Cang Ding establishes fly-ash separator.
CN2008102386881A 2008-12-22 2008-12-22 Technique for proportioning different materials in steel plant Expired - Fee Related CN101445868B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008102386881A CN101445868B (en) 2008-12-22 2008-12-22 Technique for proportioning different materials in steel plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008102386881A CN101445868B (en) 2008-12-22 2008-12-22 Technique for proportioning different materials in steel plant

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CN101445868A CN101445868A (en) 2009-06-03
CN101445868B true CN101445868B (en) 2010-06-02

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102952938B (en) * 2011-08-26 2014-07-23 宝山钢铁股份有限公司 Method for processing fine ores used for blast furnace smelting by using raw ores
CN104649036B (en) * 2014-12-22 2017-01-04 天津钢铁集团有限公司 A kind of stacking method improving mixing material stability
CN105842104B (en) * 2016-03-21 2018-09-18 王露露 The detection method of water content in a kind of seasoning material manufacturing technique
CN106148681A (en) * 2016-08-30 2016-11-23 山东钢铁股份有限公司 Reduce compound preparation facilities and the preparation method of sintering machine solid fuel consumption
CN106282541A (en) * 2016-09-19 2017-01-04 山东石横特钢集团有限公司 A kind of environmental protection closed raw material blending method
CN106521146A (en) * 2016-10-10 2017-03-22 山东钢铁股份有限公司 Utilization method for sintering machine head dedusting ash

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