CN102618718A - Method for preparing high strength green pellets from steel plant iron-containing dust - Google Patents
Method for preparing high strength green pellets from steel plant iron-containing dust Download PDFInfo
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- CN102618718A CN102618718A CN2012100150851A CN201210015085A CN102618718A CN 102618718 A CN102618718 A CN 102618718A CN 2012100150851 A CN2012100150851 A CN 2012100150851A CN 201210015085 A CN201210015085 A CN 201210015085A CN 102618718 A CN102618718 A CN 102618718A
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- 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
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Abstract
The present invention relates to a method for preparing high strength green pellets from steel plant iron-containing dust. The method comprises the following steps: taking sludge, dry dust, sulfuric acid residue, dry coal fines, and quick lime to prepare the materials; uniformly stirring the sludge, mixing the sludge with the dry dust, the sulfuric acid residue, the dry coal fines, and the quick lime, stirring and uniformly dispersing, and carrying out piling-ripening for 8-24 hours to obtain a mixed clinker; and carrying out damp milling and balling on the mixed clinker. The method of the present invention has the following advantages that: the process is simple, the production cost is low, and the technical indicators are advanced. The prepared green pellets have characteristics of water content of 10-15%, falling strength of 4-8 times/0.5 m, compressive strength of 10-15 Newton/per pellet, and granularity of 5-16 mm, and provide high-quality raw materials for the subsequent successful metal pellets sintered roasting dezincification. In addition, the method is suitable for industrial application.
Description
Technical field:
The invention discloses the method that a kind of steel mill iron dust containing prepares the HS green-ball; Belong to technical field of ferrous metallurgy.
Background technology
Iron dust containing is the accessory substance that produces in Iron And Steel Plant's ironmaking and the steelmaking process; Mainly from sintering, blast furnace ironmaking and converter steelmaking dedusting and coking furnace WWT; Main valuable element such as iron content and charcoal; In addition, harmful elements such as also leaded, zinc, arsenic, wherein zinc has certain recycling and is worth.In addition, sulfate slag also is a kind of important iron content secondary resource.Therefore; Such dust has important comprehensive utilization value with the burning slag for iron and steel enterprise, cause the enrichment of harmful element in blast furnace again easily but directly reclaim to use, and influences the steady running of main production line; Even cause a serious accident; Arsenic is unfavorable for smelting the high-quality steel grade behind the entering molten iron, thereby can't recycles these reclaimed materials owing in smelting process, is difficult to remove simultaneously.Adopt pelletizing metallization sintering process can the effective elimination starting material in harmful elements such as zinc, arsenic; Prerequisite is that the compound that such dust and sulfate slag are formed must at first be made ball, guarantees that the bed of material has air permeability and good in process is baked with agglomeration in the pelletizing metallization.But the size composition of such dust, sulfate slag and coking furnace mud, moisture and surface hydrophilic gender gap are very big, and balling-up property is poor, makes the ball difficulty.Therefore, limited the regenerated using of such dust, sulfate slag and coking furnace mud etc.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art and provide a kind of process method simple, easy to operate, can effectively improve steel mill's iron dust containing balling-up property, steel mill's iron dust containing that the quality of green pellets of manufacturing is good prepares the method for HS green-ball.
Steel mill of the present invention iron dust containing prepares the method for HS green-ball, comprises the steps:
The first step: batching
Get mud (by butt weight), 20-25% dry type dust, the sulfate slag of 10-20%, 10%-25% dry coal powder, the 5%-10% unslaked lime of 20%-35% by mass percentage respectively; Said mud moisture (the quality percentage composition of water in the mud) 30%-40%;
Second step: batch mixing
With mud stir mix with dry type dust, sulfate slag, dry coal powder, unslaked lime and dispersed with stirring even, stored up slaking 8-24 hour; Obtain mixing grog;
The 3rd step: make ball
To mix grog profit mill and make ball.
Steel mill of the present invention iron dust containing prepares in the method for HS green-ball, and said mud is at least a in converter mud, blast furnace gas mud, the coke oven mud.
Steel mill of the present invention iron dust containing prepares in the method for HS green-ball, and said dry type dust is at least a in sintering plant electro-precipitating dust and the blast furnace dust.
Steel mill of the present invention iron dust containing prepares in the method for HS green-ball, and said mud adopts to stir and blocks mixing machine and stir; Said mud mixes with siccatives such as dry type dust, sulfate slag, dry coal powder, unslaked limes and adopts the stirrer dispersed with stirring even.
Steel mill of the present invention iron dust containing prepares in the method for HS green-ball, and said mixing grog adopts damp mill to moisten mill, profit grind materials moisture (the quality percentage composition of water in the profit grind materials) 7-9%, profit time consuming 2-5min.
Steel mill of the present invention iron dust containing prepares in the method for HS green-ball, makes ball time 10-15min, green-ball moisture (the quality percentage composition of water in the green-ball) 10-15%.
The present invention is owing to adopt above-mentioned process method; Very big to such dry dust, dried sulfate slag, dry coal powder and mud size composition, moisture and surface hydrophilic gender gap, balling-up property is poor, makes the problem of ball difficulty; The compound that before making ball, such raw material is constituted carries out strengthening the dehydration pre-treatment from dehydration and thermochemistry effect; Carry out surperficial mechanical activation treatment then, improve its balling-up property, strengthen and make ball.To guarantee when adopting the pelletizing metallization to bake with agglomeration dezincify; In process is baked with agglomeration in the pelletizing metallization; The pelletizing bed of material has air permeability and good, and reduction of reinforced iron oxide compound and reduction volatilization dezincify dearsenification improve pellet agglomerate output and quality; For blast furnace ironmaking provides the high-quality furnace charge, comprehensively reclaim valuable elements such as zinc.
The converter steeling sludge that water cut is too high, blast furnace gas mud class ion dust mud contaning, coking furnace mud (containing charcoal dirt mud), transportation and use difficulty often adopt filter press technique to dewater, filtration difficulty, the filter cake moisture fluctuation is big, and filter cleans difficult, and production cost is high.But the dry dust of steel mill, coal dust and sulfate slag porosity are high, surface hydrophilicity is poor, often need before making ball, need add water in advance, carry out long-time wetting to improve balling-up property.The present invention utilizes dry dust, dry coal powder and the high characteristics of sulfate slag porosity; With wet type dirt mud directly add the wetting ability difference dry dust, do in the compound that reduction coal dust, dried sulfate slag and unslaked lime constitutes; Utilize porous dry material strong absorptive, quicklime slaking suction and exothermic effect thereof; Carry out the dehydration of heating of compound, dehydration and the wetting in advance combination of dry material with wet stock improve dewatering efficiency greatly; Improve the dispersiveness and the material surface hydrophilicity of compound, save production cost.Then compound is moistened mill and forces and disperse, on the dish pelletizer of garden, make ball, can prepare the high-quality green-ball.
The reinforcement pellet forming process that the present invention adopts stirs various mud stirring to block in the mixing machine, is sprayed onto the surface of various dry mixs, disperses and mixing through mixing machine, and the mixing material is carried out 8-24 hour storing up and maturation process.Mixing material after the slaking gets into damp mill again and moistens mill, further mixes, forces to disperse, grinds and reduce moisture, improves surfactivity.Profit mill back material feeds pelletizer and makes ball and screening, can prepare the qualified green-ball of high-quality (granularity 5-16mm), returns profit grinder preface less than 5mm with greater than the green-ball of 16mm.Wherein key is to utilize porous dry material strong absorptive, quicklime slaking suction and exothermic effect thereof; Carry out the dehydration of heating of compound; Dehydration and the wetting in advance combination of dry material with wet stock; Improve dewatering efficiency greatly, improve the dispersiveness and the material surface hydrophilicity of compound, save production cost.
Advantage of the present invention and positively effect:
Technical process of the present invention is simple; Production cost is low; Technical indicator is advanced, the green-ball moisture 10%-15% for preparing, 4 times/0.5m-8 time/0.5m of shatter strength of green pellet, compression strength of green pellet 10Newton/-15Newton/ is individual; Green-ball granularity 5mm-16mm is for the dezincify of baking with agglomeration of follow-up successful metallized pellet provides high quality raw material.Be suitable for industrial applications.
Description of drawings
Accompanying drawing 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1:
Proportioning raw materials (by butt weight): converter mud 20%, gas mud 5%, coking furnace mud 10%, dry type dust 15%, gas ash 10%, sulfate slag 20%, unslaked lime 10%, coal dust 10%.Compound is undertaken three times by flow process mix, store up slaking after 8 hours, add damp mill and moisten mill; Profit grind materials moisture 8%, profit time consuming 3min makes ball time 12min; Make ball moisture 15%; Prepare the high-quality green-ball: green-ball moisture 13.3%, 4.2 times/0.5m of shatter strength of green pellet, compression strength of green pellet 11.0Newton/, green-ball granularity 5-16mm.
Embodiment 2:
Proportioning raw materials (by butt weight): converter mud 25%, gas mud 5%, dry type dust 8%, gas ash 17%, sulfate slag 20%, unslaked lime 10%, coal dust 15%.Compound is undertaken three times by flow process mix, store up slaking after 8 hours, add damp mill and moisten mill; Profit grind materials moisture 7.3%, profit time consuming 3min makes ball time 12min; Make ball moisture 15%; Prepare the high-quality green-ball: green-ball moisture 12.3%, 4.2 times/0.5m of shatter strength of green pellet, compression strength of green pellet 11.0Newton/, green-ball granularity 5-16mm.
Embodiment 3:
Proportioning raw materials (by butt weight): converter mud 20%, gas mud 5%, dry type dust 10%, gas ash 15%, sulfate slag 25%, unslaked lime 10%, coal dust 15%.Compound is undertaken three times by flow process mix, store up slaking after 8 hours, add damp mill and moisten mill; Profit grind materials moisture 8.8%, profit time consuming 3min makes ball time 12min; Make ball moisture 14%; Prepare the high-quality green-ball: green-ball moisture 15.3%, 6.3 times/0.5m of shatter strength of green pellet, compression strength of green pellet 12.0Newton/, green-ball granularity 5-16mm.
Embodiment 4:
Proportioning raw materials (by butt weight): converter mud 15%, gas mud 5%, dry type dust 10%, gas ash 15%, sulfate slag 20%, unslaked lime 10%, coal dust 25%.Compound is undertaken three times by flow process mix, store up slaking after 8 hours, add damp mill and moisten mill; Profit grind materials moisture 7.5%, profit time consuming 3min makes ball time 12min; Make ball moisture 14%; Prepare the high-quality green-ball: green-ball moisture 12.8%, 5.5 times/0.5m of shatter strength of green pellet, compression strength of green pellet 15.0Newton/, green-ball granularity 5-16mm.
Embodiment 5:
Proportioning raw materials (by butt weight): converter mud 25%, gas mud 5%, coking furnace mud 5%, dry type dust 15%, gas ash 10%, sulfate slag 25%, unslaked lime 5%, coal dust 10%.Compound is undertaken three times by flow process mix, store up slaking after 24 hours, add damp mill and moisten mill; Profit grind materials moisture 7.9%, profit time consuming 3min makes ball time 15min; Make ball moisture 15%; Prepare the high-quality green-ball: green-ball moisture 14.8%, 7.9 times/0.5m of shatter strength of green pellet, compression strength of green pellet 12.1Newton/, green-ball granularity 5-16mm.
Embodiment 6:
Proportioning raw materials (by butt weight): converter mud 25%, gas mud 5%, coking furnace mud 5%, dry type dust 10%, gas ash 10%, sulfate slag 25%, unslaked lime 10%, coal dust 10%.Compound is undertaken three times by flow process mix, store up slaking after 12 hours, add damp mill and moisten mill; Profit grind materials moisture 7.9%, profit time consuming 3min makes ball time 15min; Make ball moisture 15%; Prepare the high-quality green-ball: green-ball moisture 14.2%, 6.6 times/0.5m of shatter strength of green pellet, compression strength of green pellet 13.3Newton/, green-ball granularity 5-16mm.
Claims (6)
1. steel mill's iron dust containing prepares the method for HS green-ball, comprises the steps:
The first step: batching
Get mud, 20-25% dry type dust, the sulfate slag of 10-20%, 10%-25% dry coal powder, 5%-10% unslaked lime by mass percentage respectively by butt weight 20%-35%; The moisture 30%-40% of said mud;
Second step: batch mixing
With mud stir mix with dry type dust, sulfate slag, dry coal powder, unslaked lime and dispersed with stirring even, stored up slaking 8-24 hour; Obtain mixing grog;
The 3rd step: make ball
To mix grog profit mill and make ball.
2. steel mill according to claim 1 iron dust containing prepares the method for HS green-ball, it is characterized in that: said mud is at least a in converter mud, blast furnace gas mud, the coke oven mud.
3. steel mill according to claim 2 iron dust containing prepares the method for HS green-ball, it is characterized in that: said dry type dust is at least a in sintering plant electro-precipitating dust and the blast furnace dust.
4. steel mill according to claim 3 iron dust containing prepares the method for HS green-ball, it is characterized in that: said mud adopts to stir and blocks mixing machine and stir; Said mud mixes with siccatives such as dry type dust, sulfate slag, dry coal powder, unslaked limes and adopts the stirrer dispersed with stirring even.
5. steel mill according to claim 4 iron dust containing prepares the method for HS green-ball, it is characterized in that: said mixing grog adopts damp mill to moisten mill, profit grind materials moisture 7-9%, profit time consuming 2-5min.
6. prepare the method for HS green-ball according to any described steel mill iron dust containing of claim 1-5, it is characterized in that: make ball time 10-15min, green-ball moisture 10-15%.
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| CN2012100150851A CN102618718B (en) | 2012-01-18 | 2012-01-18 | Method for preparing high strength green pellets from steel plant iron-containing dust |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710531A (en) * | 2013-12-20 | 2014-04-09 | 攀钢集团成都钢钒有限公司 | Method for improving temperature of vanadium-titanium sintering mixture |
| CN104341087A (en) * | 2014-10-30 | 2015-02-11 | 唐山首钢京唐西山焦化有限责任公司 | Method for treating coking and biochemical sludge |
| US20160024611A1 (en) * | 2013-03-26 | 2016-01-28 | Posco | Method for recycling iron-containing by-products discharged from coal-based molten ironmaking process, system therefor, and reduced iron agglomeration system |
| CN106148685A (en) * | 2016-07-28 | 2016-11-23 | 重庆大学 | A kind of municipal sludge and iron-containing waste prepare the method for acid pellet |
| CN110317950A (en) * | 2019-08-05 | 2019-10-11 | 中南大学 | A kind of reduction dezincification method of zinc-containing dust |
| CN110317949A (en) * | 2019-08-05 | 2019-10-11 | 中南大学 | A kind of preparation method of zinc-containing dust pelletizing |
| CN111118283A (en) * | 2020-01-07 | 2020-05-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111733323A (en) * | 2020-07-21 | 2020-10-02 | 张家港宏昌钢板有限公司 | Method for reducing water consumption for pelletizing of iron-containing dust and mud |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195080C (en) * | 2001-08-08 | 2005-03-30 | 伍发贵 | Method for manufacturing hearth layer ball of sintered ore for iron-smelting |
| CN101476032B (en) * | 2009-02-12 | 2011-06-08 | 重庆科绿威科技开发有限公司 | Metallurgy sintering processing method for urban domestic garbage incineration flyash |
-
2012
- 2012-01-18 CN CN2012100150851A patent/CN102618718B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195080C (en) * | 2001-08-08 | 2005-03-30 | 伍发贵 | Method for manufacturing hearth layer ball of sintered ore for iron-smelting |
| CN101476032B (en) * | 2009-02-12 | 2011-06-08 | 重庆科绿威科技开发有限公司 | Metallurgy sintering processing method for urban domestic garbage incineration flyash |
Non-Patent Citations (4)
| Title |
|---|
| 《华东冶金学院学报》 19881231 邢献炳 "竖炉中硫酸渣生产自熔性球团矿的研究" 第1-7页 1-6 第5卷, 第3期 * |
| 《武汉科技大学学报》 20081031 薛正良等 "用含铁物料和煤粉直接制备金属铁粒的新工艺研究" 第453-456页 1-6 第31卷, 第5期 * |
| 薛正良等: ""用含铁物料和煤粉直接制备金属铁粒的新工艺研究"", 《武汉科技大学学报》 * |
| 邢献炳: ""竖炉中硫酸渣生产自熔性球团矿的研究"", 《华东冶金学院学报》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160024611A1 (en) * | 2013-03-26 | 2016-01-28 | Posco | Method for recycling iron-containing by-products discharged from coal-based molten ironmaking process, system therefor, and reduced iron agglomeration system |
| US9994928B2 (en) * | 2013-03-26 | 2018-06-12 | Posco | Method for recycling iron-containing by-products discharged from coal-based molten ironmaking process, system therefor, and reduced iron agglomeration system |
| CN103710531A (en) * | 2013-12-20 | 2014-04-09 | 攀钢集团成都钢钒有限公司 | Method for improving temperature of vanadium-titanium sintering mixture |
| CN103710531B (en) * | 2013-12-20 | 2015-09-09 | 攀钢集团成都钢钒有限公司 | A kind of method improving vanadium titanium sinter mixture temperature |
| CN104341087A (en) * | 2014-10-30 | 2015-02-11 | 唐山首钢京唐西山焦化有限责任公司 | Method for treating coking and biochemical sludge |
| CN106148685A (en) * | 2016-07-28 | 2016-11-23 | 重庆大学 | A kind of municipal sludge and iron-containing waste prepare the method for acid pellet |
| CN110317950A (en) * | 2019-08-05 | 2019-10-11 | 中南大学 | A kind of reduction dezincification method of zinc-containing dust |
| CN110317949A (en) * | 2019-08-05 | 2019-10-11 | 中南大学 | A kind of preparation method of zinc-containing dust pelletizing |
| CN110317950B (en) * | 2019-08-05 | 2021-06-08 | 中南大学 | Reduction dezincification method for zinc-containing dust |
| CN110317949B (en) * | 2019-08-05 | 2021-06-08 | 中南大学 | Preparation method of zinc-containing dust pellets |
| CN111118283A (en) * | 2020-01-07 | 2020-05-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111118283B (en) * | 2020-01-07 | 2021-10-08 | 云南云铜锌业股份有限公司 | Method for granulating zinc leaching residues, zinc leaching residue material and application thereof |
| CN111733323A (en) * | 2020-07-21 | 2020-10-02 | 张家港宏昌钢板有限公司 | Method for reducing water consumption for pelletizing of iron-containing dust and mud |
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