CN105347643B - A kind of technique for handling steel rolling oily sludge using steel slag waste heat - Google Patents
A kind of technique for handling steel rolling oily sludge using steel slag waste heat Download PDFInfo
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- CN105347643B CN105347643B CN201510914215.9A CN201510914215A CN105347643B CN 105347643 B CN105347643 B CN 105347643B CN 201510914215 A CN201510914215 A CN 201510914215A CN 105347643 B CN105347643 B CN 105347643B
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Abstract
The invention discloses a kind of technique that steel rolling oily sludge is handled using steel slag waste heat, its step are as follows：1st, pave the slag loaded more than slag bath volume 1/3rd in the vexed slag slag bath of heat, and slag surface temperature control is more than 500 DEG C；2nd, by greasy filth roping caused by steel rolling to the vexed slag slag field of heat, greasy filth is poured into the vexed slag slag bath of heat, paved uniformly；3rd, continue the slag input into slag bath, the liquid steel slag of high temperature is poured on to the uniform steel rolling greasy filth top that paves, according to the vexed slag process implementing of normal heat after 30min；4th, after the vexed slag technique of heat terminates, select the normal magnetic separation process of flowing molten iron journey to choose iron therein according to slag and be used.
Description
Technical field
The present invention relates to a kind of technique for handling steel rolling oily sludge using steel slag waste heat.
Background technology
Major pollutants are iron scale and oil in rolling effluent, and the cycle water after rebuilding and improving after requirement processing is：
Suspension content≤50mg/L, oil content≤5mg/L.Steel rolling water quality is mostly brownish red emulsion, pH value typically 6.8~
7.2, backwater SS typically in 100~300 mg/L, oil content be typically generally in 40~80 mg/L. its processing method " it is one heavy,
Two is flat, three filterings ", " one is heavy " refers to one-level cyclone sediment, mainly removes big iron scale;" two is flat " refer to advection sedimentation or
Tube settling, mainly remove the less impurity of grain diameter;" three filterings " refers to high rate filter, magnetic filter etc..Last shape
Into thickened sludge, thickened sludge oil-containing and moisture, also substantial amounts of iron oxide.The characteristics of this steel rolling greasy filth is due to the above,
All it is difficult by sintering and steel-making, most steel mill treats that moisture and greasy filth therein volatilize one section using caching at present
Reuse or discarded burial, the harm for environment are larger after time.
Consulting literatures：（1）Ji Zhenxing is public in 2005 " the metallurgical water saving of Second China National, sewage disposal technology seminar "
There is " the concentration of hydraulic mixture of certain steel rolling mill among the paper of entitled " research of steel rolling oil-containing turbid circulating water comprehensive treatment technique " of cloth
40%, oil content is up to 11~13, by be pumped into three-phase decanter machine dehydration, continuous feed, solid, oily, water three-phase continuously separate, pass through
It can be sent into sedimentation basin only containing 0.05%~0.1% oil and 0.3%~0.4% solid matter in aqueous phase after dehydration and return turbid follow
Ring water system.Oil content recycles up to 97% in oil phase.The moisture content of mud cake is only 14%~16% and minimal amount of oil
(~3.0%) is mainly brown iron oxide, is recycled as high-grade Iron concentrate." content statement；（2）Liao Hongqiang, money
It is triumphant, Zhao Minge et al. announced in 2006 on " Second China National Baosteel Annual Conference " entitled " Shoudu Iron and Steel Co is developed a circular economy skill
There is " the steel rolling oil-sludge treatment technology of Shoudu Iron and Steel Co independent development, by steel rolling greasy filth solid waste in an art practice and strategic thinking " text
Processing is separated into three kinds of moisture, oil and brown iron oxide products, and realizes its harmless treatment and recycling." content
Statement.It can be seen from document more than, there is presently no the process using steel slag waste heat processing steel rolling oily sludge.
The content of the invention
It is an object of the invention to provide a kind of technique that steel rolling oily sludge is handled using steel slag waste heat, slag is utilized
Waste heat, the oil among greasy filth is cracked, the carbon containing and hydrogenous material after cracking, the iron oxide in greasy filth can be reduced.
The object of the present invention is achieved like this, and a kind of technique that steel rolling oily sludge is handled using steel slag waste heat, it is walked
It is rapid as follows：1st, pave the slag loaded more than slag bath volume 1/3rd in the vexed slag slag bath of heat, and slag surface temperature control exists
More than 500 DEG C；2nd, by greasy filth roping caused by steel rolling to the vexed slag slag field of heat, greasy filth is poured into the vexed slag slag bath of heat, paved uniformly；
3rd, continue the slag input into slag bath, the liquid steel slag of high temperature is poured on to the uniform steel rolling greasy filth top that paves, according to normal after 30min
Hot vexed slag process implementing；4th, after the vexed slag technique of heat terminates, the normal magnetic separation process for selecting flowing molten iron journey according to slag is chosen wherein
Iron be used.
The technical principle of the present invention is as follows：In view of the oil contained in steel rolling greasy filth, the product after cracking at high temperature, this
Body is a kind of reducing agent, based on this, is added using by steel rolling greasy filth in high-temperature liquid state slag, utilizes the waste heat of slag, cracked oil
Oil among mud, the carbon containing and hydrogenous material after cracking, can reduce the iron oxide in greasy filth, wherein the reaction that can occur is as follows
Table.
| Sequence number | Reaction | Standard free energy Δ G/J | Reaction starting temperature/DEG C |
| 1 | 2Fe2O3（s）+3C(s)=4Fe（s）+3CO2(g) | 435668-512.48T | 577 |
| 2 | Fe2O3（s）+3C(s)=2Fe（s）+3CO(g) | 467659-512.74T | 639 |
| 3 | Fe2O3（s）+3CO(g)=2Fe（s）+3CO2(g) | -31991+0.26T | - |
| 4 | 2FeO（s）+C(s)=2Fe（s）+CO2(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）+CO2(g) | -21335+22.68T | <668 |
As seen from the above table, iron oxide is the oxide for being easy to reduction, if it is reduced into metal, turning into can be by magnetic
Route selection magnetic separation recovery utilizes, and can turn into the raw material of steel-making.The high-temp liquid slag of steel-making, temperature use more than 1500 DEG C
The greasy filth of iron content is added among liquid steel slag, utilizes slag, it is necessary to cooling of fetching water, heat energy are wasted by the vexed Slag treatment of heat
Waste oil in waste heat cracking greasy filth, pyrolysis product reduce the iron oxide among greasy filth, and being allowed to most of turns into metallic iron, in slag
It is recovered, is used in the technical process of magnetic separation, and this process is endothermic process, and advantageously reduce beating for hot vexed slag
Water cooling operates, and realizes the water consume problem reduced during residues processing technique.
Beneficial effects of the present invention：1st, it is reduced by the PROCESS FOR TREATMENT of the present invention, the iron oxide of steel rolling greasy filth inside points
As physics iron（Metallic iron）, part low price iron is changed into high price iron, is provided with magnetic, can be recycled.This processing
Technology pattern, the handling process of steel rolling greasy filth is simplified, take up an area for saving blowdown, utilize the potential value of greasy filth.2nd, can
The oil among iron content greasy filth is made full use of, can be used after cracking as reducing agent, be allowed to value maximization.3rd, slag is utilized
Waste oil in waste heat cracking greasy filth, for reducing the iron oxide among iron content greasy filth, while make use of steel slag waste heat, save
Cooling water, reduce the cost of Slag treatment.
Embodiment
A kind of technique that steel rolling oily sludge is handled using steel slag waste heat, its step are as follows：1st, spread out in the vexed slag slag bath of heat
Mat formation into the slag more than slag bath volume 1/3rd, slag surface temperature control is more than 500 DEG C；2nd, will be oily caused by steel rolling
Greasy filth is poured into the vexed slag slag bath of heat, paved uniformly to the vexed slag slag field of heat by mud roping；3rd, the slag input into slag bath is continued, by high temperature
Liquid steel slag be poured on the uniform steel rolling greasy filth top that paves, according to the vexed slag process implementing of normal heat after 30min；4th, the vexed slag of heat
After technique terminates, select the normal magnetic separation process of flowing molten iron journey to choose iron therein according to slag and be used.
Claims (1)
1. a kind of technique for handling steel rolling oily sludge using steel slag waste heat, it is characterised in that its step is as follows：1st, in the vexed slag of heat
Pave the slag for loading and exceeding slag bath volume 1/3rd in slag bath, and slag surface temperature control is more than 500 DEG C；2nd, by steel rolling
Greasy filth is poured into the vexed slag slag bath of heat, paved uniformly to the vexed slag slag field of heat by caused greasy filth roping；3rd, continue to enter into slag bath
Slag, the liquid steel slag of high temperature is poured on the uniform steel rolling greasy filth top that paves, real according to the vexed slag technique of normal heat after 30min
Apply；4th, after the vexed slag technique of heat terminates, select the normal magnetic separation process of flowing molten iron journey to choose iron therein according to slag and be used.
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| CN201510914215.9A CN105347643B (en) | 2015-12-13 | 2015-12-13 | A kind of technique for handling steel rolling oily sludge using steel slag waste heat |
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| CN105347643B true CN105347643B (en) | 2017-12-22 |
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| 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 |
| 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 |
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 |
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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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