CN103160302B - Processing method of metallurgical dust mud containing iron carbon zinc - Google Patents
Processing method of metallurgical dust mud containing iron carbon zinc Download PDFInfo
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- CN103160302B CN103160302B CN201110419715.7A CN201110419715A CN103160302B CN 103160302 B CN103160302 B CN 103160302B CN 201110419715 A CN201110419715 A CN 201110419715A CN 103160302 B CN103160302 B CN 103160302B
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Abstract
The invention discloses a processing method of metallurgical dust mud containing iron carbon zinc. The method is as below: mixing the following raw materials by weight percentage: 10%-40% of metallurgical dust mud and 60%-90% of pulverized coal, wherein a molar ratio of Zn to S is controlled at 1-1.1; adding water accounting for 8%-12% of the total weight of the metallurgical dust mud and pulverized coal into the mixture, and conducting cold press molding under pressure of 300-800Kg / cm<2> by a roll ball press machine to obtain raw iron coke balls with strength no less than 20N / ball; and then loading the raw balls and bulk materials into a coke oven for coking, and maintaining a central temperature of coke cake at 950 DEG C-1100 DEG C for 1-2 h to reach a coking end. During the coking process, Zn enters into the coke oven gas, and is removed by forming into ZnS with H2S in the gas. The invention utilizes existing coking equipment and an iron coke composite pellet process to treat metallurgical dust mud containing iron carbon zinc, and reaches zinc removal rate higher than 96%, and H2S removal rate of the coke oven gas higher than 80%; and the obtained coke gains good performance indexes including mechanical strength M40 higher than 60% and reactivity CRI higher than 50%, has high mechanical strength, high reactivity, and can save production cost of iron coke by 400 yuan / ton, compared with an iron ore powder.
Description
Technical field
The invention belongs to metallurgical environmental protection and coking technology field, particularly a kind of metallurgical dust sludge treatment process of iron content carbon zinc.
Background technology
Iron and steel enterprise creates a large amount of iron content carbon zinc fume mud in steel manufacture process, as electric furnace dust mud, blast furnace dust, blast furnace gas mud etc.The many employings of the Land use systems of current iron and steel enterprise to metallurgical dust sludge are directly allocated in sintering and pellet, if publication number is that CN1385255A is called " method that ion dust mud contaning and sinter return fine recycle " and application number is that CN200410040020.8 is called " steel-smelting sewage sludge starches the method being used for pellet formation pelletizing " etc.But its shortcoming existed: 1) dirt mud fine size, easily produces secondary pollution in transport, mixing and sintering process; 2) in sintering process, comparatively thin and water content is higher dirt mud will worsen sintered layer ventilation property, affect SINTERING PRODUCTION technical indicator, sinter quality is declined, cause output to reduce; 3) beneficial element such as iron, carbon in metallurgical waste can only be recycled and blast furnace harmful element zinc, lead etc. wherein can not be removed.Therefore, the recycling of iron content carbon zinc fume mud is a great problem of long-standing problem smelter.Usually a large amount of places can only be taken store up the iron content carbon zinc fume mud that can not enter blast furnace process.
Adopt cooled agglomerated pellet formal layout iron content carbon zinc fume mud, if application number is that CN200910038305.0 is called " a kind of Application way of iron containing metallurgical dust ", application number is CN200710010650.4 " a kind of cold bound pellet and preparation method thereof " by name, application number 98103522.1 " a kind for the treatment of process of high zinc containing iron dust " by name, publication number is that CN1470657A is called Chinese patents such as the recovery processing technique of ultralow zinc fume mud " smelt iron and make steel " and can processes containing zinc with not containing the multiple iron-containing waste of zinc, not only need to add reductive agent, catalyzer and binding agent etc., also need specific equipment, and its treatment process is complicated, energy consumption and power consumption high.The Chinese patent that publication number CN101818264A is called " treatment process of a kind of zinc-iron-containing dust, mud " is interpolation 0.4% ~ 2% binding agent, be pressed into sludge pellet, utilize high temperature liquid iron that dirt pug is reduced to melt, with the blast-melted molten iron being mixed into coverter pig, but its dirt pug pelletizing consumption is few, otherwise affect molten iron temperature, and life-time service may reduce iron ladle refractory materials.
Adopt low middle temperature consolidation iron coke formal layout iron content carbon zinc fume mud, if publication number is that CN101619387 is called " a kind of low-temperature concretion adhesive for iron coke of colding pressing and preparation method thereof ", publication number is: CN101619386 is called " a kind of iron coke for blast furnaces and Synthesis and applications thereof ", publication number is that the patents such as CN1243885 " middle temperature Spheroidized iron-coke ore solidified rapidly and equipment " by name all disclose a certain amount of binding agent of interpolation below 800 DEG C, adopt powdered iron ore, iron ore concentrate, dedusting ash, iron scale and revolving furnace mud etc. produce hyperergy coke, its product can be used for blast furnace ironmaking, the refrigerant etc. of converter steelmaking, but this method can not process Zinc-Bearing Wastes, more can not realize the effect of coke oven gas desulfurization.
Summary of the invention
The object of the present invention is to provide a kind of metallurgical dust sludge treatment process of iron content carbon zinc, utilize the metallurgical dust sludge of high temperature iron coke composite pellet art breading iron content carbon zinc, not only effectively utilize the iron content carbon zinc fume mud of iron and steel enterprise, can also harmful element zinc in effective elimination dirt mud, and can the iron coke with hyperergy and high mechanical strength be produced, the effect of coke oven gas desulfurization can be realized simultaneously.
A metallurgical dust sludge treatment process for iron content carbon zinc, is characterized in that raw material being carried out proportioning mixing by following weight percent, metallurgical dust sludge 10%-40%, coal dust 60%-90%, and controlling Zn/S mol ratio in raw material is 1.0 ~ 1.1; Compound adds the water accounting for metallurgical dust sludge and coal dust gross weight 8%-12%, adopt the coldmoulding of pair roller ball press to obtain under the pressure of 300-800Kg/cm2 iron coke green-ball that intensity is not less than 20N/ ball; Then green-ball and bulk material are loaded coking in coke oven jointly, after Center Temperature of Coke Cake reaches 950 DEG C ~ 1100 DEG C, keep 1 ~ 2h to be coking terminal.
Described metallurgical dust sludge is one or more of electric furnace dust mud, gas ash, gas mud, dedusting ash etc.Described coal dust is one or more of the weak caking coals such as 1/3 coking coal, bottle coal, lean coal, and granularity < 3mm accounts for more than 90%.
The present invention do not increase any facility investment and do not add binding agent condition under, utilize the metallurgical dust sludge of high temperature iron coke composite pellet art breading iron content carbon zinc, not only eliminate the unstable of carbon content in dirt mud, effectively except harmful elements such as zinc in dust removal mud, and the zinc fume of high temperature reduction volatilization can with H in coke-oven gas
2s reaction generates the effect that ZnS realizes coal gas desulfurization, produces the iron coke that high reactivity and high strength blast furnace uses, protection of the environment simultaneously.Utilize the metallurgical dust sludge of existing coking equipment and iron coke composite pellet art breading iron content carbon zinc, dezinc degree reaches more than 96%, the H of coke-oven gas
2s decreasing ratio can reach more than 80%, and gained coke property index is better simultaneously, and its physical strength M40 can reach more than 60%, reactive CRI can reach more than 50%, has high mechanical strength, hyperergy, and compare with powdered iron ore, iron coke production cost about 400 yuan/ton can be saved.
Embodiment
Be described below in conjunction with specific embodiment:
Embodiment 1 is the metallurgical dust sludge 12% of 1.0 and iron content carbon zinc by Zn/S mol ratio, the proportioning of coal dust 88% is weighed and is carried out being dry mixed (metallurgical dust sludge proportioning electricity furnace dust mud: gas ash is 9: 91, coal dust proportioning 1/3 coking coal: lean coal is 81: 19), mix rear adjustment moisture, outer water distribution content is made to reach 8% of the total mass to metallurgical dust sludge and coal dust, then pair roller ball press pressure ball is adopted, obtain the green-ball that intensity is 22.4N/ ball, then green-ball and bulk material are loaded 40Kg coke oven jointly, simultaneously, ensure that the hole of green-ball fills up by bulk cargo, heat this mixed charging until Center Temperature of Coke Cake reach 950 DEG C after 1h discharge of the coke, obtain hyperergy iron coke, recording its M40 is 66.7%, M10 is 7.9%, CRI is 54.3%, calculating dezinc degree is by analysis 97.8%, the H of coke-oven gas
2s decreasing ratio is 82.7%.
Embodiment 2 is the metallurgical dust sludge 23% of 1.05 and iron content carbon zinc by Zn/S mol ratio, the proportioning of coal dust 77% is weighed and is dry mixed, (metallurgical dust sludge proportioning electricity furnace dust mud: dedusting ash is 25: 75, coal dust proportioning 1/3 coking coal: bottle coal is 90: 10) mix rear adjustment moisture, outer water distribution content is made to reach 9% of the total mass to metallurgical dust sludge and coal dust, then pair roller ball press pressure ball is adopted, obtain the green-ball that intensity is 23.2N/ ball, then green-ball and bulk material are loaded 40Kg coke oven jointly, simultaneously, ensure that the hole of green-ball fills up by bulk cargo, heat this mixed charging until Center Temperature of Coke Cake reach 1000 DEG C after 2h discharge of the coke, obtain hyperergy iron coke, recording its M40 is 62.5%, M10 is 8.4%, CRI is 57.3%, calculating dezinc degree is by analysis 97.3%, the H of coke-oven gas
2s decreasing ratio is 85.7%.
Embodiment 3 is the metallurgical dust sludge 35% of 1.1 and iron content carbon zinc by Zn/S mol ratio, the proportioning of coal dust 65% is weighed and is dry mixed, (metallurgical dust sludge proportioning electricity furnace dust mud: gas mud is 23: 77, coal dust proportioning 1/3 coking coal: bottle coal is 90: 10) mix rear adjustment moisture, outer water distribution content is made to reach 10% of the total mass to metallurgical dust sludge and coal dust, then pair roller ball press pressure ball is adopted, obtain the green-ball that intensity is 23.7N/ ball, then green-ball and bulk material are loaded 40Kg coke oven jointly, simultaneously, ensure that the hole of green-ball fills up by bulk cargo, heat this mixed charging until Center Temperature of Coke Cake reach 1000 DEG C after 2h discharge of the coke, obtain hyperergy iron coke, recording its M40 is 60.3%, M10 is 15.7%, CRI is 66.5%, calculating dezinc degree is by analysis 97.1%, the H of coke-oven gas
2s decreasing ratio is 88.7%.
Embodiment 4 is the metallurgical dust sludge 40% of 1.1 and iron content carbon zinc by Zn/S mol ratio, the proportioning of coal dust 60% is weighed and is carried out being dry mixed (metallurgical dust sludge proportioning electricity furnace dust mud: gas mud is 30: 70, coal dust is 1/3 coking coal), mix rear adjustment moisture, outer water distribution content is made to reach 12% of the total mass to metallurgical dust sludge and coal dust, then pair roller ball press pressure ball is adopted, obtain the green-ball that intensity is 25.1N/ ball, then green-ball and bulk material are loaded 40Kg coke oven jointly, simultaneously, ensure that the hole of green-ball fills up by bulk cargo, heat this mixed charging until Center Temperature of Coke Cake reach 1050 DEG C after 2h discharge of the coke, obtain hyperergy iron coke, recording its M40 is 52.7%, M10 is 19.9%, CRI is 76.4%, calculating dezinc degree is by analysis 96.8%, the H of coke-oven gas
2s decreasing ratio is 89.7%.
Claims (3)
1. a metallurgical dust sludge treatment process for iron content carbon zinc, is characterized in that raw material being carried out proportioning mixing by following weight percent, metallurgical dust sludge 10%-40%, coal dust 60%-90%, and controlling Zn/S mol ratio in raw material is 1.0 ~ 1.1; Compound adds the water accounting for metallurgical dust sludge and coal dust gross weight 8%-12%, at 300-800kg/cm
2pressure under adopt the coldmoulding of pair roller ball press to obtain iron coke green-ball that intensity is not less than 20N/ ball; Then green-ball and bulk material are loaded coking in coke oven jointly, after Center Temperature of Coke Cake reaches 950 DEG C ~ 1100 DEG C, keep 1 ~ 2h to be coking terminal.
2. the metallurgical dust sludge treatment process of a kind of iron content carbon zinc according to claim 1, it is characterized in that described metallurgical dust sludge be electric furnace dust mud, gas ash, gas mud, dedusting ash one or more.
3. the metallurgical dust sludge treatment process of a kind of iron content carbon zinc according to claim 1 and 2, it is characterized in that described coal dust be 1/3 coking coal, bottle coal, lean coal weak caking coal one or more, granularity <3mm accounts for more than 90%.
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| CN201110419715.7A CN103160302B (en) | 2011-12-14 | 2011-12-14 | Processing method of metallurgical dust mud containing iron carbon zinc |
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| CN201110419715.7A CN103160302B (en) | 2011-12-14 | 2011-12-14 | Processing method of metallurgical dust mud containing iron carbon zinc |
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| CN103160302B true CN103160302B (en) | 2015-03-11 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105695653B (en) * | 2016-03-25 | 2018-12-14 | 首钢集团有限公司 | A kind of generation method and system of prereduction iron-containing charge |
| CN107557575A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | A kind of technique for handling metallurgical dust sludge waste material |
| CN106190208A (en) * | 2016-07-06 | 2016-12-07 | 唐山钢铁集团有限责任公司 | A kind of regeneration method of blast furnace dedusting ash |
| CN107142120B (en) * | 2017-06-28 | 2020-06-05 | 中冶京诚工程技术有限公司 | High-reactivity coke and preparation method thereof |
| CN111996024B (en) * | 2020-08-05 | 2021-11-30 | 北京科技大学 | Method for preparing high-reactivity coke by compounding metallurgical dust and high-sulfur coal and cooperatively removing zinc and sulfur |
| CN113104939B (en) * | 2021-04-15 | 2022-07-05 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724746A (en) * | 2009-12-22 | 2010-06-09 | 上海得旺力实业有限公司 | Internal-combustion ferro-coke pellets/lump ores and method for manufacturing same |
| CN101818264A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Method for treating zinc-iron-containing dust and sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5936189A (en) * | 1982-08-25 | 1984-02-28 | Kawatetsu Kagaku Kk | Preparation of metallurgical coke by briquetting charging coal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818264A (en) * | 2009-02-27 | 2010-09-01 | 鞍钢股份有限公司 | Method for treating zinc-iron-containing dust and sludge |
| CN101724746A (en) * | 2009-12-22 | 2010-06-09 | 上海得旺力实业有限公司 | Internal-combustion ferro-coke pellets/lump ores and method for manufacturing same |
Non-Patent Citations (2)
| Title |
|---|
| ."黑色金属冶炼".《辞海 工程技术分册》.上海辞书出版社 新2版,1987,第122页. * |
| "梅钢高炉瓦斯泥资源化利用工艺开发——尘泥造球及脱锌还原的试验研究";张佩盈;《万方数据知识服务平台》;20040810;第27-28,30,49-50页 * |
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