CN101468914A - High-temperature calcination technology for brick making material of 1-5% chromic slag, 11-15% chromium=containing clay and 60-68% alkaline residue under 1350 DEG C +/- 100 DEG C in vertical kiln - Google Patents
High-temperature calcination technology for brick making material of 1-5% chromic slag, 11-15% chromium=containing clay and 60-68% alkaline residue under 1350 DEG C +/- 100 DEG C in vertical kiln Download PDFInfo
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- CN101468914A CN101468914A CNA200710060637XA CN200710060637A CN101468914A CN 101468914 A CN101468914 A CN 101468914A CN A200710060637X A CNA200710060637X A CN A200710060637XA CN 200710060637 A CN200710060637 A CN 200710060637A CN 101468914 A CN101468914 A CN 101468914A
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- chromium
- chromium slag
- slag
- alkaline residue
- alexandrolite
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The invention belongs to chromium slag treating and comprehensive unitizing technology, which comprises: 1 to 5 percent of chromium slag, 11 to 15 percent of chromium-containing clay, 60 to 68 percent of base slag and coal are mixed evenly, milled, pelletized and calcined, and the high temperature environment between 1,250 and 1,450 DEG C of a vertical kiln and carbon monoxide are utilized to reduce chromium VI in the chromium slag and the chromium-containing clay into chromium III, so as to achieve detoxification; the burning materials can be used as brick making materials; and the technology has the advantages of no secondary pollution, quick treatment speed, low cost and reduction of construction cost.
Description
Technical field
The invention belongs to the improvement and the comprehensive utilization technique of hazardous solid waste chromium slag and solid waste alkaline residue, be particularly related to and utilize mechanical shaft kiln high-temperature improvement chromium slag and contain sexavalent chrome and chromium slag and alkaline residue incinerating technology in the alexandrolite, with the chromium slag, contain alexandrolite, alkaline residue, all mix with coal, abrasive dust, balling-up, calcining, utilizing in the shaft kiln 1350 ℃ ± 100 ℃ of high temperature and carbon monoxide environment to make hexavalent chrome reduction is trivalent chromium, but and then reach toxicide and burn till material making cement blended material, do not produce secondary pollution, improvement speed is fast, and expense is low, reduces construction costs.
Background technology
Because it is big that a large amount of chromium slags that traditional chromic salts industry discharged lack the improvement amount, expense is low, and the improvement method of non-secondary pollution causes the chromium slag and contains alexandrolite environment is caused severe contamination, has restricted the development of chromic salts industry to a great extent even is forced to stop production.In addition, chemical industry produces a large amount of alkaline residue contaminate environment, and loft need are rationally disposed.Dispose the chromium slag, contain alexandrolite, alkaline residue comprehensive utilization technique with shaft kiln, at home and abroad there is no report.The present invention is with 1350 ℃ ± 100 ℃ temperature and the processing condition of shaft kiln calcination cement clinker, utilize 1350 ℃ ± 100 ℃ high temperature, reduzate and acidic conditions are nontoxic trivalent chromium with the chromium slag with the hexavalent chrome reduction that contains in the alexandrolite, and add alkaline residue realization resource utilization, through engineering approaches, particularly break through the expense height, improvement speed is slow, realizes social benefit, environmental benefit, economic benefit is obvious, is task of the present invention.
Summary of the invention
The present invention makes the chromium slag and contains in the alexandrolite hexavalent chrome reduction for not causing the trivalent chromium of secondary pollution with the reducing atmosphere that the operation of 1350 ℃ ± 100 ℃ high temperature of shaft kiln calcination cement clinker and dark dying fire produces.The present invention is a method of utilizing shaft kiln high-temperature calcination chrome slag dry detoxified chromium slag of the high temperature reduction and detoxication method that generally adopts being improved formation both at home and abroad, the technology that form a kind of chromium slag, contain alexandrolite, alkaline residue is sintered into brick producing material.
The present invention gives the effect that shaft kiln has 1350 ℃ ± 100 ℃ high temperature, carbon monoxide reduction and detoxication, 1-5% chromium slag 11-15% is contained alexandrolite 60-68% alkaline residue and coal all to be mixed, abrasive dust, balling-up, the chromium slag with contain under the operation of the dark dying fire of alexandrolite shaft kiln through preheating zone, thermal zone, make the chromium slag and contain that hexavalent chrome reduction is a trivalent chromium in the alexandrolite, and be fixed in the molten mass, enter cooling zone and put and burn till material exit quick cooling or the high pressure water anti-oxidation of shrend rapidly, principal reaction is as follows: under alkaline condition during greater than 500 ℃: CrO
3+ 3/2O
2=2CrO
3, at 700～800 ℃, shrend produces hydrogen and carbon monoxide: C+H
2O=H
2+ CO stops chromic diffuse pollution in the chromium slag; Utilize shaft kiln high-temperature and carbon monoxide reductive action with the chromium slag with contain in the alexandrolite in the sexavalent chrome and kiln 1350 ℃ ± 100 ℃ high temperature and carbon monoxide environment, be reduced to nontoxic trivalent chromium, and generate more stable complex compound, the chromium slag with contain alexandrolite and detoxified.Simultaneously, the chromium slag, contain alexandrolite, alkaline residue, be sintered into cement clinker.Present method is utilized shaft kiln high-temperature to administer the chromium slag in a large number, is contained alexandrolite, alkaline residue, and the essence of its engineering construction is the technology that forms a detoxifcation simple in structure and resource utilization.On the one hand the chromium slag, contain not to be afraid of after alexandrolite, the dreg control and scatter, run off, the permanent material of infiltration, creating conditions again on the other hand makes full use of the character of the physical mechanics that burns till material, can do brick producing material, realizes comprehensive utilization.
Dry detoxified being meant of 1350 ℃ ± 100 ℃ high temperature reductions of indication of the present invention contains 1350 ℃ ± 100 ℃ of shaft kiln high-temperatures, carbon monoxide reduction mechanism, the incinerating sintered material is arranged in the reducing substances environment when 500 ℃ of dischargings through calcining in about six hours, quick cooling (shrend is better) prevents oxygenizement to the trivalent chromium that has been reduced in the chromium slag.
It is a kind of 1350 ℃ ± 100 ℃ high temperature, carbon monoxide condition utilized that the present invention utilizes the idle dry detoxified method of machine vertical kiln special calcination chrome slag in cement mill; Be to adopt to administer the chromium slag both at home and abroad and contain the comprehensive utilization technique of the sophisticated high-temperature detoxification technology of alexandrolite after improving, it is a safe non-secondary pollution, economic benefit, social benefit, environmental benefit significantly fully utilize the chromium slag, contain alexandrolite, the technology of alkaline residue.
Description of drawings
Accompanying drawing is the structural representation of present method
Embodiment
Below in conjunction with accompanying drawing present method is further described
Embodiment 1
Press the engineering synoptic diagram of Fig. 1, with the chromium slag, contain alexandrolite, alkaline residue and pulverize to be placed in the dryer and dry, enter raw grinding respectively through batching scale and coal then, enter the homogenizing storehouse,, go into shaft kiln high-temperature and burn till again through lift, add water, balling-up in advance, at shaft kiln through preheating zone, thermal zone, cooling zone, the time (see figure 2) is burnt till material 1350 ℃ ± 100 ℃ of high temperature in the carbon monoxide environment about seven hours, and relevant chromic regulation Zhi Shuo ≦ 1.5mg/L becomes brick producing material in the judging standard.
Claims (4)
1, a kind of the chromium slag is used for the high temperature of machine shaft kiln 1350 DEG C ± 100 ℃, carbon monoxide is to the chromium slag and contain hexavalent chrome reduction mechanism in the alexandrolite, forms the chromium slag and contains alexandrolite detoxifcation and alkaline residue resource technology; Burning till material after the detoxifcation is: utilize under machine shaft kiln 1350 DEG C ± 100 ℃ high temperature, the carbon monoxide reductive condition 1-5% chromium slag 11-15% to contain alexandrolite 60-68% alkaline residue and enter thermal zone 1350 ℃ ± 100 ℃ through the preheating zone under the dark dying fire operation of machine shaft kiln, make that hexavalent chrome reduction is a trivalent chromium in the chromium slag, after entering cooling zone, put and burn till the material exit in 500 ℃ ± 50 ℃ quick cooling or the high pressure water anti-oxidation of shrend rapidly, and then generate stable chromium slag and burn till material, form a safe non-secondary pollution economy, society, the tangible brick producing material technology of environmental benefit.
2, under 1350 ℃ ± 100 ℃ of claim " 1 " high temperature zone temperatures, high-temperature calcination makes hexavalent chrome reduction under reducing atmosphere be trivalent chromium.
3, the preheating zone in claim " 1 " and " 2 " machine shaft kiln is 1350 ℃ ± 100 ℃, and thermal zone 900 ℃, 500 ℃ ± 50 ℃ of cooling zones; Sexavalent chrome in the chromium slag there is the intensive reduction, detoxifies and prevents oxygenizement.
4, the ratio of chromium slag, flyash, alkaline residue, Wingdale and coal, clay in the claim " 1-3 " should be controlled the chromium slag and be advisable at 1-5:11-15:60-68:15:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710060637XA CN101468914A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for brick making material of 1-5% chromic slag, 11-15% chromium=containing clay and 60-68% alkaline residue under 1350 DEG C +/- 100 DEG C in vertical kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710060637XA CN101468914A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for brick making material of 1-5% chromic slag, 11-15% chromium=containing clay and 60-68% alkaline residue under 1350 DEG C +/- 100 DEG C in vertical kiln |
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| Publication Number | Publication Date |
|---|---|
| CN101468914A true CN101468914A (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710060637XA Pending CN101468914A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for brick making material of 1-5% chromic slag, 11-15% chromium=containing clay and 60-68% alkaline residue under 1350 DEG C +/- 100 DEG C in vertical kiln |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084857A (en) * | 2014-05-15 | 2015-11-25 | 江苏大地益源环境修复有限公司 | Technological method for treating stainless steel pickling sludge |
| CN105665436A (en) * | 2016-03-18 | 2016-06-15 | 济南大学 | Reclamation method for hexavalent chromium contaminated soil |
-
2007
- 2007-12-28 CN CNA200710060637XA patent/CN101468914A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084857A (en) * | 2014-05-15 | 2015-11-25 | 江苏大地益源环境修复有限公司 | Technological method for treating stainless steel pickling sludge |
| CN105084857B (en) * | 2014-05-15 | 2017-12-15 | 江苏大地益源环境修复有限公司 | A kind of process for disposing acid-washing stainless steel sludge |
| CN105665436A (en) * | 2016-03-18 | 2016-06-15 | 济南大学 | Reclamation method for hexavalent chromium contaminated soil |
| CN105665436B (en) * | 2016-03-18 | 2018-05-18 | 济南大学 | A kind of method of resource of hexavalent chromium polluted soil |
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Open date: 20090701 |