CN105347643A - Technology for treating steel-rolling oily sludge by means of steel slag waste heat - Google Patents
Technology for treating steel-rolling oily sludge by means of steel slag waste heat Download PDFInfo
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- CN105347643A CN105347643A CN201510914215.9A CN201510914215A CN105347643A CN 105347643 A CN105347643 A CN 105347643A CN 201510914215 A CN201510914215 A CN 201510914215A CN 105347643 A CN105347643 A CN 105347643A
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Abstract
The invention discloses a technology for treating steel-rolling oily sludge by means of steel slag waste heat. The technology comprises the following steps that 1, steel slag accounting for more than one third of the volume of a slag pool is loaded in the hot disintegrating slag pool in a paving mode, and the surface temperature of the steel slag is controlled at 500 DEG C or above; 2, the oily sludge generated in steel rolling is transported to a hot disintegrating slag field, poured into the hot disintegrating slag pool and then evenly paved; 3, the steel slag is continuously poured into the slag pool, the high-temperature liquid-state steel slag is poured on the upper portion of the steel-rolling oily sludge which is evenly paved, and a normal hot disintegrating slag technology is implemented after 30 min; 4, after the hot disintegrating slag technology is finished, iron in the steel slag is selected to be utilized according to a normal magnetic separation technology in the steel slag iron selection process.
Description
Technical field
The present invention relates to a kind of technique utilizing steel slag waste heat process steel rolling oily sludge.
Background technology
In rolling effluent, principal pollutant are iron scale and oil, and the cycle water after requiring process after rebuilding and improving is: suspension content≤50mg/L, oil-contg≤5mg/L.Steel rolling water quality mostly is red-brown emulsion; pH value is generally 6.8 ~ 7.2, and backwater SS is generally at 100 ~ 300mg/L, and oil-contg is generally generally " heavy, two flat, three filtrations " in its treatment process of 40 ~ 80mg/L.; " one sinks " refers to one-level cyclone sediment, mainly removes large iron scale; " two is flat " refers to advection sedimentation or tube settling, mainly removes the less impurity of grain diameter; " three filter " refers to high rate filter, magnetic filter etc.The thickened sludge finally formed, thickened sludge oil-containing and moisture, also have a large amount of ferric oxide.This steel rolling greasy filth due to more than, be all difficult to utilize in sintering and steel-making, current most steel mill adopts buffer memory, and reuse or discardedly to bury after moisture wherein and greasy filth volatilize for some time, the harm for environment is larger.
By consulting literatures: (1) Ji Zhenxing has in the middle of 2005 " Second China National metallurgy water saving, sewage disposal technology symposial " upper paper being entitled as " research of steel rolling oil-containing turbid circulating water comprehensive treatment technique " announced " concentration of hydraulic mixture 40% of certain Steel Mill; oleaginousness is up to 11 ~ 13; dewater by being pumped into three-phase decanter machine; continuously feeding; solid, oil, water three-phase be continuously separated; after dehydration in aqueous phase only containing the oil of 0.05% ~ 0.1% and the solid matter of 0.3% ~ 0.4%, settling tank can be sent into and return turbid circulating water system.In oil phase, oil-contg reaches 97%, recycles.The water ratio of mud cake is only oil (~ 3.0%) the mainly brown iron oxide of 14% ~ 16% and little amount, recycles as high-grade Iron concentrate." content statement; (2) Liao Hongqiang, Qian Kai, the people such as Zhao Minge 2006 " Second China National Baosteel Annual Conference " upper announce be entitled as in " Shoudu Iron and Steel Co develop a circular economy engineering practice and strategic thinking " literary composition and have " the steel rolling oil-sludge treatment technology of Shoudu Iron and Steel Co independent development; the processing of steel rolling greasy filth solid waste is separated into moisture, oil content and brown iron oxide three kinds of products, and realizes its harmless treatment and recycling." content statement.According to above document, also do not utilize the processing method of steel slag waste heat process steel rolling oily sludge at present.
Summary of the invention
The object of the present invention is to provide a kind of technique utilizing steel slag waste heat process steel rolling oily sludge, utilize the waste heat of slag, the oil in the middle of cracking greasy filth, the carbon containing after cracking and hydrogenous material, the ferric oxide that can reduce in greasy filth.
The object of the present invention is achieved like this, a kind of technique utilizing steel slag waste heat process steel rolling oily sludge, and its step is as follows: the loading that 1, paves in the vexed slag slag bath of heat exceedes the slag of slag bath volume 1/3rd, and slag surface temperature control is more than 500 DEG C; Greasy filth, to hot vexed slag slag field, is poured in hot vexed slag slag bath by the greasy filth roping 2, steel rolling produced, and paves evenly; 3, continue slag input in slag bath, the liquid steel slag of high temperature is poured on the uniform steel rolling greasy filth top that paves, according to normal hot vexed slag process implementing after 30min; 4, after hot vexed slag technique terminates, the iron selecting the normal magnetic separation process of flowing molten iron journey to choose wherein according to slag is used.
Know-why of the present invention is as follows: consider the oil contained in steel rolling greasy filth, product at high temperature after cracking, it itself is a kind of reductive agent, based on this, adopt and steel rolling greasy filth is added in high-temperature liquid state slag, utilize the waste heat of slag, oil in the middle of cracking greasy filth, carbon containing after cracking and hydrogenous material, the ferric oxide that can reduce in greasy filth, the reaction that wherein can occur is as following table.
| Sequence number | Reaction | Standard free energy Δ G/J | Reaction starting temperature/DEG C |
| 1 | 2Fe 2O 3（s）+3C(s)=4Fe（s）+3CO 2(g) | 435668-512.48T | 577 |
| 2 | Fe 2O 3（s）+3C(s)=2Fe（s）+3CO(g) | 467659-512.74T | 639 |
| 3 | Fe 2O 3（s）+3CO(g)=2Fe（s）+3CO 2(g) | -31991+0.26T | - |
| 4 | 2FeO（s）+C(s)=2Fe（s）+CO 2(g) | 123880-125.64T | 713 |
| 5 | FeO（s）+C(s)=Fe（s）+CO(g) | 145215-148.32T | 706 |
| 6 | FeO（s）+C0(g)=Fe（s）+CO 2(g) | -21335+22.68T | <668 |
As seen from the above table, ferric oxide is the oxide compound being easy to reduce, if it is reduced into metal, becomes and can be recycled by the magnetic separation of magnetic separation line, can become the raw material of steel-making.The high-temp liquid slag of steel-making, temperature is more than 1500 DEG C, adopt hot vexed Slag treatment, need to fetch water cooling, heat energy is wasted, the greasy filth of iron content is joined in the middle of liquid steel slag, utilize the waste oil in the waste heat cracking greasy filth of slag, ferric oxide in the middle of split product reduction greasy filth, making it major part becomes metallic iron, is recovered in the technological process of steel scoria magnetic separation, be used, and this process is endothermic process, and be conducive to the cooling operation of fetching water reducing hot vexed slag, realize the water consumption problem reduced in residues processing technique process.
Beneficial effect of the present invention: 1, through art breading of the present invention, in steel rolling greasy filth, the ferric oxide of part is reduced into as physics iron (metallic iron), and part at a low price iron changes high price iron into, is provided with magnetic, can be recovered utilization.This treatment process pattern, simplifies the treatment scheme of steel rolling greasy filth, for saving blowdown occupation of land, utilizing the potential value of greasy filth.2, the oil in the middle of iron content greasy filth can be made full use of, can use as reductive agent after cracking, make it value maximization.3, utilize the waste oil in the waste heat cracking greasy filth of slag, for the ferric oxide reduced in the middle of iron content greasy filth, while make use of steel slag waste heat, saved cooling water, reduced the cost of Slag treatment.
Embodiment
Utilize a technique for steel slag waste heat process steel rolling oily sludge, its step is as follows: the loading that 1, paves in the vexed slag slag bath of heat exceedes the slag of slag bath volume 1/3rd, and slag surface temperature control is more than 500 DEG C; Greasy filth, to hot vexed slag slag field, is poured in hot vexed slag slag bath by the greasy filth roping 2, steel rolling produced, and paves evenly; 3, continue slag input in slag bath, the liquid steel slag of high temperature is poured on the uniform steel rolling greasy filth top that paves, according to normal hot vexed slag process implementing after 30min; 4, after hot vexed slag technique terminates, the iron selecting the normal magnetic separation process of flowing molten iron journey to choose wherein according to slag is used.
Claims (1)
1. utilize a technique for steel slag waste heat process steel rolling oily sludge, it is characterized in that its step is as follows: the loading that 1, paves in the vexed slag slag bath of heat exceedes the slag of slag bath volume 1/3rd, and slag surface temperature control is more than 500 DEG C; Greasy filth, to hot vexed slag slag field, is poured in hot vexed slag slag bath by the greasy filth roping 2, steel rolling produced, and paves evenly; 3, continue slag input in slag bath, the liquid steel slag of high temperature is poured on the uniform steel rolling greasy filth top that paves, according to normal hot vexed slag process implementing after 30min; 4, after hot vexed slag technique terminates, the iron selecting the normal magnetic separation process of flowing molten iron journey to choose wherein according to slag is used.
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| CN105347643B CN105347643B (en) | 2017-12-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876022A (en) * | 2021-01-19 | 2021-06-01 | 重庆科技学院 | Utilize thermosetting carrier to handle pyrolysis device of steel rolling fatlute |
| CN112961959A (en) * | 2021-02-01 | 2021-06-15 | 武汉钢铁有限公司 | Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method |
| CN114807462A (en) * | 2022-03-29 | 2022-07-29 | 马鞍山钢铁股份有限公司 | Method for hot-rolling oil sludge through hot-disintegration treatment of steel slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411664A (en) * | 1992-09-28 | 1995-05-02 | W. R. Grace & Co.-Conn. | Method for dehalogenation and degradation of halogenated organic contaminants |
| CN1552639A (en) * | 2003-05-26 | 2004-12-08 | 李峻泰 | Method for comprehensive treating waste emulsion liquid and chromium containing waste water by metallurgy chemical industry technology |
| CN1733628A (en) * | 2005-07-11 | 2006-02-15 | 台州盛世环境工程有限公司 | Resource recovery process of galvanizing sludge |
| CN104512988A (en) * | 2013-09-29 | 2015-04-15 | 宝山钢铁股份有限公司 | Method for treating heavy metal sludge by using stainless steel molten slag |
-
2015
- 2015-12-13 CN CN201510914215.9A patent/CN105347643B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411664A (en) * | 1992-09-28 | 1995-05-02 | W. R. Grace & Co.-Conn. | Method for dehalogenation and degradation of halogenated organic contaminants |
| CN1552639A (en) * | 2003-05-26 | 2004-12-08 | 李峻泰 | Method for comprehensive treating waste emulsion liquid and chromium containing waste water by metallurgy chemical industry technology |
| CN1733628A (en) * | 2005-07-11 | 2006-02-15 | 台州盛世环境工程有限公司 | Resource recovery process of galvanizing sludge |
| CN104512988A (en) * | 2013-09-29 | 2015-04-15 | 宝山钢铁股份有限公司 | Method for treating heavy metal sludge by using stainless steel molten slag |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112876022A (en) * | 2021-01-19 | 2021-06-01 | 重庆科技学院 | Utilize thermosetting carrier to handle pyrolysis device of steel rolling fatlute |
| CN112876022B (en) * | 2021-01-19 | 2022-05-27 | 重庆科技学院 | Utilize thermosetting carrier to handle pyrolysis device of steel rolling fatlute |
| CN112961959A (en) * | 2021-02-01 | 2021-06-15 | 武汉钢铁有限公司 | Oil-containing iron-containing dust mud and hot-state casting residue cooperative production and utilization method |
| CN114807462A (en) * | 2022-03-29 | 2022-07-29 | 马鞍山钢铁股份有限公司 | Method for hot-rolling oil sludge through hot-disintegration treatment of steel slag |
| CN114807462B (en) * | 2022-03-29 | 2023-09-22 | 马鞍山钢铁股份有限公司 | Method for hot rolling sludge by utilizing steel slag hot-disintegrating treatment |
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Inventor after: Li Yuxin Inventor after: Zhao Xuzhang Inventor after: Zhu Jun Inventor before: Li Yuxin Inventor before: Zhao Xuzhang Inventor before: Zhu Jun |
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Effective date of registration: 20180716 Address after: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Bayi Iron & Steel Co., Ltd. Address before: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Patentee before: Baosteel Group Xinjiang Bayi Iron & Steel Co., Ltd. |
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Effective date of registration: 20190129 Address after: Room 305, Room No. 372, Bayi Road, Toutunhe District, Urumqi City, Xinjiang Uygur Autonomous Region, 830026 Patentee after: Xinjiang Huli Jiayuan Environmental Technology Co. Ltd. Address before: 830022 No. 1 Bayi Road, Toutun River District, Urumqi, the Xinjiang Uygur Autonomous Region Patentee before: Xinjiang Bayi Iron & Steel Co., Ltd. |
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