CN101468911A - High-temperature calcination technology for 20-30% chromic slag and 40-60% alkaline residue brick making material under 1100 DEG C +/- 100 DEG C in vertical kiln - Google Patents
High-temperature calcination technology for 20-30% chromic slag and 40-60% alkaline residue brick making material under 1100 DEG C +/- 100 DEG C in vertical kiln Download PDFInfo
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- CN101468911A CN101468911A CNA2007100606257A CN200710060625A CN101468911A CN 101468911 A CN101468911 A CN 101468911A CN A2007100606257 A CNA2007100606257 A CN A2007100606257A CN 200710060625 A CN200710060625 A CN 200710060625A CN 101468911 A CN101468911 A CN 101468911A
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- chromium
- chromium slag
- slag
- alkaline residue
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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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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to technology for manufacturing a brick-making material by calcining 20 to 30 percent of chromium slag and 40 to 60 percent of base slag at a high temperature of 1,100 +/-100 DEG C in a vertical kiln, and belongs to technology of treatment and comprehensive utilization of the chromium slag. The technology comprises the following steps: matching, evenly mixing, pulverizing, pelletizing and calcining 20 to 30 percent of the chromium slag, 40 to 60 percent of the base slag, coal and clay, and reducing hexavalent chromium into trivalent chromium by using high-temperature environment of 1,100 +/- 100 DEG C and carbon monoxide in a vertical kiln, so as to obtain a detoxified baking material capable of manufacturing the brick-making material. The technology does not generate secondary pollution, has quick treatment speed and low expense, and reduces 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 to administer sexavalent chrome and chromium slag and alkaline residue incinerating technology in the chromium slag, chromium slag, alkaline residue and coal, clay are all mixed, abrasive dust, balling-up, calcining, utilizing in the shaft kiln 1100 ℃ ± 100 ℃ of high temperature and carbon monoxide environment to make hexavalent chrome reduction is trivalent chromium, and then reach toxicide burn till material can realize the comprehensive utilization, 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 that 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 chromium slag, alkaline residue comprehensive utilization technique with shaft kiln, at home and abroad there is no report.The present invention is adjusted with 1100 ℃ ± 100 ℃ temperature and the processing condition of shaft kiln calcination cement clinker, utilize 1100 ℃ ± 100 ℃ high temperature, reduzate and acidic conditions are nontoxic trivalent chromium with the hexavalent chrome reduction in the chromium slag, 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 in the chromium slag hexavalent chrome reduction for not causing the trivalent chromium of secondary pollution with the reducing atmosphere that the operation of 1100 ℃ ± 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, forms a kind of chromium slag, alkaline residue comprehensive utilization technique.
The present invention gives the effect that shaft kiln has 1100 ℃ ± 100 ℃ high temperature, carbon monoxide reduction and detoxication, 20-30% chromium slag 40-60% alkaline residue and coal, clay are all mixed, abrasive dust, balling-up, the chromium slag through preheating zone, thermal zone, makes that hexavalent chrome reduction is a trivalent chromium in the chromium slag under the operation of the dark dying fire of shaft kiln, and is 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 1100 ℃ ± 100 ℃ high temperature in sexavalent chrome and the kiln in the chromium slag and carbon monoxide environment, be reduced to nontoxic trivalent chromium, and generate more stable complex compound, the chromium slag is detoxified.Simultaneously, chromium slag, alkaline residue are sintered into cement mixture.Present method utilizes shaft kiln high-temperature to administer chromium slag, building waste in a large number, and the essence of its engineering construction is the technology that forms a detoxifcation simple in structure and resource utilization.Be not afraid of after chromium slag, the dreg control on the one hand 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 1100 ℃ ± 100 ℃ high temperature reductions of indication of the present invention contains 1100 ℃ ± 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 1100 ℃ ± 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; Being to adopt to administer the comprehensive utilization technique of the sophisticated high-temperature detoxification technology of chromium slag after improving both at home and abroad, is a safe non-secondary pollution, economic benefit, and social benefit, environmental benefit significantly fully utilize the technology of chromium slag, 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, chromium slag, alkaline residue are pulverized to be placed in the dryer dry, enter respectively through batching scale and coal, clay, building waste then.Raw grinding, enter the homogenizing storehouse, again through lift, add water, balling-up in advance, going into shaft kiln high-temperature burns till, at shaft kiln through preheating zone, thermal zone, cooling zone, the time (see figure 2) is burnt till material 1100 ℃ ± 100 ℃ of high temperature in the carbon monoxide environment about six 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 1100 ℃ ± 100 ℃ of machine shaft kilns, carbon monoxide forms chromium residue detoxifying and alkaline residue resource technology to hexavalent chrome reduction mechanism in the chromium slag; Burning till material after the detoxifcation is: utilize under 1100 ℃ ± 100 ℃ high temperature of machine shaft kiln, the carbon monoxide reductive condition 20-30% chromium slag 40-60% alkaline residue to enter thermal zone 1100 ℃ ± 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 comprehensive utilization technique of environmental benefit.
2, under 1100 ℃ ± 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 1100 ℃ ± 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, alkaline residue and coal, clay in the claim " 1-3 " should be controlled at 20-30:40-60:15:10 and be advisable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100606257A CN101468911A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for 20-30% chromic slag and 40-60% alkaline residue brick making material under 1100 DEG C +/- 100 DEG C in vertical kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100606257A CN101468911A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for 20-30% chromic slag and 40-60% alkaline residue brick making material under 1100 DEG C +/- 100 DEG C in vertical kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101468911A true CN101468911A (en) | 2009-07-01 |
Family
ID=40826754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100606257A Pending CN101468911A (en) | 2007-12-28 | 2007-12-28 | High-temperature calcination technology for 20-30% chromic slag and 40-60% alkaline residue brick making material under 1100 DEG C +/- 100 DEG C in vertical kiln |
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| CN (1) | CN101468911A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107417255A (en) * | 2017-09-12 | 2017-12-01 | 山东省科学院新材料研究所 | The recycling treatment Application way of chromium slag, tailings in vanadium extraction waste pollutant |
| US10207966B2 (en) | 2014-12-31 | 2019-02-19 | Sabic Global Technologies B.V. | Process for enhancing the performance of the dehydrogenation of alkanes |
-
2007
- 2007-12-28 CN CNA2007100606257A patent/CN101468911A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10207966B2 (en) | 2014-12-31 | 2019-02-19 | Sabic Global Technologies B.V. | Process for enhancing the performance of the dehydrogenation of alkanes |
| CN107417255A (en) * | 2017-09-12 | 2017-12-01 | 山东省科学院新材料研究所 | The recycling treatment Application way of chromium slag, tailings in vanadium extraction waste pollutant |
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Open date: 20090701 |