CN103160302A - 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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- CN103160302A CN103160302A CN2011104197157A CN201110419715A CN103160302A CN 103160302 A CN103160302 A CN 103160302A CN 2011104197157 A CN2011104197157 A CN 2011104197157A CN 201110419715 A CN201110419715 A CN 201110419715A CN 103160302 A CN103160302 A CN 103160302A
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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 mud treatment process of iron content carbon zinc.
Background technology
Iron and steel enterprise has produced 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.Iron and steel enterprise directly allocates in sintering and pellet the many employings of mode that utilize of metallurgical dust mud at present, as publication number is that CN1385255A " method of ion dust mud contaning and sinter return fine recycling " by name and application number are CN200410040020.8 " the steel-smelting sewage sludge slurry is for the method for pellet formation pelletizing " by name etc.But the shortcoming of its existence: 1) dirt mud fine size easily produces secondary pollution in transportation, mixing and sintering process; 2), in sintering process, the thin and higher dirt mud of water content will worsen the sintered layer ventilation property, affect the SINTERING PRODUCTION technical indicator, make sinter quality descend, and cause yield reducation; 3) beneficial elements such as iron in metallurgical waste, carbon can only be recycled and blast furnace harmful element zinc wherein, lead etc. can not be removed.Therefore, the recycling of iron content carbon zinc fume mud is a great problem that perplexs for a long time smelter.Usually can only take a large amount of places and store up the iron content carbon zinc fume mud that can not enter the blast furnace processing.
Adopt cooled agglomerated pellet formal layout iron content carbon zinc fume mud, as application number is CN200910038305.0 by name " a kind of iron containing metallurgical dust utilize method ", 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 the Chinese patent such as the CN1470657A by name recovery processing technique of ultralow zinc fume mud " smelt iron and make steel " can be processed containing zinc and not contain 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 complexity, energy consumption and power consumption are high.The Chinese patent of publication number CN101818264A " treatment process of a kind of zinc-iron-containing dust, mud " by name is to add 0.4%～2% binding agent, be pressed into sludge pellet, utilize high temperature liquid iron to make dirt pug reduction fusing, with the blast-melted molten iron that is mixed into coverter pig, but its dirt pug pelletizing consumption is few, otherwise affect molten iron temperature, and life-time service may reduce the iron ladle refractory materials.
Warm fixed iron coke formal layout iron content carbon zinc fume mud during employing is low, as publication number is CN101619387 " a kind of for the low-temperature concretion adhesive of iron coke and preparation method thereof of colding pressing " by name, publication number is: CN101619386 is called " a kind of iron coke for blast furnaces and preparation thereof and application ", publication number is that CN1243885 patents such as " middle temperature Spheroidized iron-coke ore solidified rapidly and equipment " by name has all been announced at a certain amount of binding agent of interpolation below 800 ℃, adopt powdered iron ore, iron ore concentrate, dedusting ash, iron scale and revolving furnace mud etc. are produced the hyperergy coke, its product can be used for blast furnace ironmaking, the refrigerant of converter steelmaking etc., but this method can not be processed containing zinc fume mud, 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 mud treatment process of iron content carbon zinc, utilize the metallurgical dust mud 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, harmful element zinc in can also effective elimination dirt mud, and can produce the iron coke with hyperergy and high mechanical strength, can realize the effect of coke oven gas desulfurization simultaneously.
A kind of metallurgical dust mud treatment process of iron content carbon zinc, is characterized in that raw material is carried out to the proportioning mixing by following weight percent, metallurgical dust mud 10%-40%, and coal dust 60%-90%, controlling Zn/S mol ratio in raw material is 1.0～1.1; Compound adds the water that accounts for metallurgical dust mud and coal dust gross weight 8%-12%, under the pressure of 300-800Kg/cm2, adopts the coldmoulding of pair roller ball press to obtain the iron coke green-ball that intensity is not less than the 20N/ ball; Then the coking in coke oven of green-ball and bulk material being packed into jointly, keeping 1～2h after Center Temperature of Coke Cake reaches 950 ℃～1100 ℃ is the coking terminal.
Described metallurgical dust mud 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 is not increasing any facility investment and is not adding under the condition of binding agent, utilize the metallurgical dust mud 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
2the S reaction generates the effect that ZnS realizes coal gas desulfurization, produces the iron coke that the high reactivity and high strength blast furnace is used, protection of the environment simultaneously.Utilize the metallurgical dust mud of existing coking equipment and iron coke composite pellet art breading iron content carbon zinc, the dezincify rate reaches more than 96%, the H of coke-oven gas
2the S 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, can save 400 yuan/tons of left and right of iron coke production cost.
Embodiment
Below in conjunction with specific embodiment, describe:
Embodiment 1 is 1.0 and the metallurgical dust mud 12% of iron content carbon zinc by the Zn/S mol ratio, the proportioning of coal dust 88% is weighed and is dry mixed that (metallurgical dust mud 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 reached to 8% of the total mass of metallurgical dust mud and coal dust, then adopt pair roller ball press pressure ball, obtain the green-ball that intensity is the 22.4N/ ball, then the 40Kg coke oven of green-ball and bulk material being packed into jointly, simultaneously, guarantee that bulk cargo fills up the hole of green-ball, heat this mixed charging until Center Temperature of Coke Cake reach 950 ℃ after 1h discharge of the coke, obtain the hyperergy iron coke, recording its M40 is 66.7%, M10 is 7.9%, CRI is 54.3%, calculating by analysis the dezincify rate is 97.8%, the H of coke-oven gas
2the S decreasing ratio is 82.7%.
Embodiment 2 is 1.05 and the metallurgical dust mud 23% of iron content carbon zinc by the Zn/S mol ratio, the proportioning of coal dust 77% is weighed and is dry mixed, (metallurgical dust mud 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 reached to 9% of the total mass of metallurgical dust mud and coal dust, then adopt pair roller ball press pressure ball, obtain the green-ball that intensity is the 23.2N/ ball, then the 40Kg coke oven of green-ball and bulk material being packed into jointly, simultaneously, guarantee that bulk cargo fills up the hole of green-ball, heat this mixed charging until Center Temperature of Coke Cake reach 1000 ℃ after 2h discharge of the coke, obtain the hyperergy iron coke, recording its M40 is 62.5%, M10 is 8.4%, CRI is 57.3%, calculating by analysis the dezincify rate is 97.3%, the H of coke-oven gas
2the S decreasing ratio is 85.7%.
Embodiment 3 is 1.1 and the metallurgical dust mud 35% of iron content carbon zinc by the Zn/S mol ratio, the proportioning of coal dust 65% is weighed and is dry mixed, (metallurgical dust mud 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 reached to 10% of the total mass of metallurgical dust mud and coal dust, then adopt pair roller ball press pressure ball, obtain the green-ball that intensity is the 23.7N/ ball, then the 40Kg coke oven of green-ball and bulk material being packed into jointly, simultaneously, guarantee that bulk cargo fills up the hole of green-ball, heat this mixed charging until Center Temperature of Coke Cake reach 1000 ℃ after 2h discharge of the coke, obtain the hyperergy iron coke, recording its M40 is 60.3%, M10 is 15.7%, CRI is 66.5%, calculating by analysis the dezincify rate is 97.1%, the H of coke-oven gas
2the S decreasing ratio is 88.7%.
Embodiment 4 is 1.1 and the metallurgical dust mud 40% of iron content carbon zinc by the Zn/S mol ratio, the proportioning of coal dust 60% is weighed and is dry mixed that (metallurgical dust mud 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 reached to 12% of the total mass of metallurgical dust mud and coal dust, then adopt pair roller ball press pressure ball, obtain the green-ball that intensity is the 25.1N/ ball, then the 40Kg coke oven of green-ball and bulk material being packed into jointly, simultaneously, guarantee that bulk cargo fills up the hole of green-ball, heat this mixed charging until Center Temperature of Coke Cake reach 1050 ℃ after 2h discharge of the coke, obtain the hyperergy iron coke, recording its M40 is 52.7%, M10 is 19.9%, CRI is 76.4%, calculating by analysis the dezincify rate is 96.8%, the H of coke-oven gas
2the S decreasing ratio is 89.7%.
Claims (3)
1. the metallurgical dust mud treatment process of an iron content carbon zinc, is characterized in that raw material is carried out to the proportioning mixing by following weight percent, metallurgical dust mud 10%-40%, and coal dust 60%-90%, controlling Zn/S mol ratio in raw material is 1.0～1.1; Compound adds the water that accounts for metallurgical dust mud and coal dust gross weight 8%-12%, at 300-800Kg/cm
2pressure under adopt the coldmoulding of pair roller ball press to obtain the iron coke green-ball that intensity is not less than the 20N/ ball; Then the coking in coke oven of green-ball and bulk material being packed into jointly, keeping 1～2h after Center Temperature of Coke Cake reaches 950 ℃～1100 ℃ is the coking terminal.
2. the metallurgical dust mud treatment process of a kind of iron content carbon zinc according to claim 1, one or more that it is characterized in that described metallurgical dust mud is electric furnace dust mud, gas ash, gas mud, dedusting ash etc.
3. the metallurgical dust mud treatment process of a kind of iron content carbon zinc according to claim 1 and 2, is characterized in that 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%.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695653A (en) * | 2016-03-25 | 2016-06-22 | 首钢总公司 | Production method and system for prereduction iron-containing furnace burden |
| 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 |
| CN107142120A (en) * | 2017-06-28 | 2017-09-08 | 中冶京诚工程技术有限公司 | A kind of high response coke and preparation method thereof |
| 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 |
| CN111996024A (en) * | 2020-08-05 | 2020-11-27 | 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 |
| CN113104939A (en) * | 2021-04-15 | 2021-07-13 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
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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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| 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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| JPS5936189A (en) * | 1982-08-25 | 1984-02-28 | Kawatetsu Kagaku Kk | Preparation of metallurgical coke by briquetting charging coal |
| 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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695653A (en) * | 2016-03-25 | 2016-06-22 | 首钢总公司 | Production method and system for prereduction iron-containing furnace burden |
| 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 |
| CN107142120A (en) * | 2017-06-28 | 2017-09-08 | 中冶京诚工程技术有限公司 | A kind of high response coke and preparation method thereof |
| 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 |
| CN111996024A (en) * | 2020-08-05 | 2020-11-27 | 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 |
| 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 |
| CN113104939A (en) * | 2021-04-15 | 2021-07-13 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
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| CN103160302B (en) | 2015-03-11 |
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