CN85102459A - Artificial aggregate of chromium slag - Google Patents
Artificial aggregate of chromium slag Download PDFInfo
- Publication number
- CN85102459A CN85102459A CN 85102459 CN85102459A CN85102459A CN 85102459 A CN85102459 A CN 85102459A CN 85102459 CN85102459 CN 85102459 CN 85102459 A CN85102459 A CN 85102459A CN 85102459 A CN85102459 A CN 85102459A
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- CN
- China
- Prior art keywords
- chromium slag
- cinder
- artificial aggregate
- moisture
- clay
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Artificial aggregate of chromium slag, the present invention is the technological improvement of artificial aggregate of chromium slag.It is reductive agent that prior art adopts the sulfonated lignin in pitch, coke, the spent pulping liquor, adopts whole raw material dry ground, adds the technology of water moulding after the mixing again, needs a large amount of moisture of evaporation in the technological process.The present invention uses cinder to be reductive agent, the employing chromic slag wet method is pulverized, and clay, cinder dry ground are within the blank moulding moisture scope mixed moisture content just, have avoided the harm of toxic dust, and save a large amount of energy, reduce production costs and the workshop investment.
Description
FIELD OF THE INVENTION: the present invention is the technological improvement of artificial aggregate of chromium slag.
The situation of prior art: produce Sodium chromate, pay and produce a large amount of chromium slags.Crossing the slag that dechromises does not almost have utility value, and long-term the stacking becomes an evil.In the past few years, the comprehensive utilization of chromium slag has been caused attention, prior art is used coke, and the sulfonated lignin in the spent pulping liquor etc. are reductive agent, and raw material all adopts dry ground.Cost is higher, and chromium slag dust is bigger to hazard to person.
Warp is to international online retrieval data and domestic and international pertinent data analysis.Having the Japan special permission clear 52-10094 of communique " processing of Sodium chromate leached mud " not find with the cinder with the similar method of the present invention is that reductive agent and chromic slag wet method are pulverized, all the other raw material dry ground, powder mixes with deleterious chromium slag mud and poisonous material, make mixture moisture be in the interior technology of the required scope of compound moulding just, be the present invention's said " not having toxic dust, the broken hybrid technique of no toxic surplus pigment ", or title " nontoxic pulverizing hybrid technique ".
The purpose of invention: the present invention be adopt general chromium salt production factory as the cinder of waste as reductive agent, thereby the purchase and the transportation problem of reductive agent have been solved, adopt " nontoxic pulverizing hybrid technique ", reduce energy consumption, simplify dust removal installation, avoided the harm at chromium ground-slag end.
The formation of invention: the present invention is that to become fineness be 100 to 400 orders for the chromium slag wet-milling that will moisturely be 38～45%, be generally 40% (wet basis), best 100 to 200 purpose mud, with clay, cinder dry ground to fineness is 20 to 200 orders, best 80 to 120 orders, to become moisture be about 15～25% (wet basis) mixing in the machine of stirring uniform mixing with chromium slag mud and clay, cinder mixture then.The chromium slag is 30～60% in the mixture.Making diameter through extruding machine is 10 to 20 millimeters particle, sends back in the rotary kiln through 1150 to 1250 ℃ and burns 5 to 10 minutes, relies on to contain Cr
6+The pyrolytic decomposition of solubility chromic salts in the acidic oxidation substance environment makes Cr
6+Change Cr into
3+, be aided with the reductive agent reduction and make Cr
6+Change Cr into
3+And enter the stable spinel of formation in the mineral crystalline phase that newly forms under the high temperature, and pyroxene-type mineral, thus make the chromium slag become nontoxic and useful artificial aggregate of chromium slag of the present invention.
Compared with the prior art the advantage that has:
The reductive agent that uses in the prior art as pitch, coke, need to buy, spent pulping liquor common moisture about 90%, obtaining sulfonated lignin need evaporate large quantity of moisture, expend a large amount of energy, and generally need could arrive chromium salt production factory through suitable distance transportation, other reductive agents need have collection, transportation at least.
The present invention uses cinder to be reductive agent, and just there are enough quantums of output general chromium salt factory our factory, thereby reaches the purpose of comprehensive utilization, reduction artificial aggregate of chromium slag production cost.
2. prior art adopts whole raw material dry ground, and is moisture about 30% because the chromium slag is leached mud, and general clay is moisture about 10%, and cinder is moisture to approach zero.By proportioning of the present invention, chromium slag: clay: cinder :=5: 4: 1, the 1000Kg dry mix be obtained and moisture 250Kg need be evaporated, add entry again, make that compound is moisture to reach 20%.About (wet basis), just can make the moulding of artificial aggregate of chromium slag blank.
As adopt the whole wet-millings of raw material, press filtration becomes 20% moisture pug, then can produce poisonous surplus water, needs to handle in addition.
By of the present invention, make the mixing pug that contains the 1000Kg siccative and only need evaporate moisture 40Kg in the clay, lack than prior art and evaporate 210Kg moisture, because chromium slag quantum of output is very big, thereby save a large amount of energy.
3. do not produce toxic dust, thereby reduce the dust removal installation burden significantly, reduce workshop investment and production cost.
The explanation of most preferred embodiment: getting 5 parts of chromium slags (being converted into dried slag weight) wet-milling becomes moisture 40% (wet basis) 120 purpose chromium slag muds; 4 parts of (being converted into dry ground weight) oven dry of clay back is levigate to 80 orders; 1 part of cinder is levigate to 80 orders; levigated clay and cinder are mixed in mixing drum; in stirrer, mix to mix with chromium slag mud then and close evenly; make 10～20 millimeters small-particle with tablets press, put into rotary kiln after the drying and promptly obtained nontoxic artificial aggregate of chromium slag in 5 minutes through 1200 ℃ of calcinings.
Claims (5)
1. artificial aggregate of chromium slag is reductive agent and the silicon-containing material such as sulfonated lignin that adds pitch, coke, spent pulping liquor in the chromium slag, and all raw material adopts dry ground.Feature of the present invention is that to adopt cinder be reductive agent, and used chromic slag wet method is ground into chromium slag mud, and used clay and cinder dry ground are then with chromium slag mud and clay, the direct mixing moulding of cinder mixture.
2. by the described artificial aggregate of chromium slag of claim 1, it is characterized in that chromium slag mud moisture be 38～45%.
3. by the described artificial aggregate of chromium slag of claim 1, it is characterized in that the mixture fineness of said clay, cinder is 20～200 orders, be preferably 80～120 orders.
4. by claim 1 and 2 described chromium slag muds, it is characterized in that the chromium slag mud fineness is 100～400 orders, best 100～200 orders.
5. by the described artificial aggregate of chromium slag of claim 1, the moisture that it is characterized in that chromium slag mud and clay, cinder mixture is 15～25% (wet basis).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102459 CN85102459B (en) | 1985-04-01 | 1985-04-01 | Artificial aggregate of chromium slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85102459 CN85102459B (en) | 1985-04-01 | 1985-04-01 | Artificial aggregate of chromium slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85102459A true CN85102459A (en) | 1985-11-10 |
| CN85102459B CN85102459B (en) | 1987-10-07 |
Family
ID=4792528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85102459 Expired CN85102459B (en) | 1985-04-01 | 1985-04-01 | Artificial aggregate of chromium slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85102459B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072619C (en) * | 1995-10-26 | 2001-10-10 | 刘梅锡 | Chrome dreg-gypsum dreg gel, its products and production and application |
| CN100427682C (en) * | 2006-01-04 | 2008-10-22 | 四川安县银河建化集团有限公司 | Use of detoxinic chromium slag as paving material |
| CN101486537B (en) * | 2009-03-04 | 2012-02-08 | 无锡市宜宏耐火材料有限公司 | Method for producing aggregate from steel waste slag |
| CN106082966A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Electroplating sludge ceramic aggregate and manufacture method thereof |
| CN106082964A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Hydrargyrum mine tailing ceramic aggregate and manufacture method thereof |
| CN106082963A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Leather-making mud ceramic aggregate and manufacture method thereof |
| CN106082978A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Nickel metallurgy waste slag ceramics aggregate and manufacture method thereof |
| CN106083130A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Copper fumes slag ceramic aggregate and manufacture method thereof |
| CN114349477A (en) * | 2022-01-12 | 2022-04-15 | 湖南国发控股有限公司 | Detoxification formula with high chromium slag amount and process for producing synergistic light aggregate |
-
1985
- 1985-04-01 CN CN 85102459 patent/CN85102459B/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072619C (en) * | 1995-10-26 | 2001-10-10 | 刘梅锡 | Chrome dreg-gypsum dreg gel, its products and production and application |
| CN100427682C (en) * | 2006-01-04 | 2008-10-22 | 四川安县银河建化集团有限公司 | Use of detoxinic chromium slag as paving material |
| CN101486537B (en) * | 2009-03-04 | 2012-02-08 | 无锡市宜宏耐火材料有限公司 | Method for producing aggregate from steel waste slag |
| CN106082966A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Electroplating sludge ceramic aggregate and manufacture method thereof |
| CN106082964A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Hydrargyrum mine tailing ceramic aggregate and manufacture method thereof |
| CN106082963A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Leather-making mud ceramic aggregate and manufacture method thereof |
| CN106082978A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Nickel metallurgy waste slag ceramics aggregate and manufacture method thereof |
| CN106083130A (en) * | 2016-06-13 | 2016-11-09 | 曹树梁 | Copper fumes slag ceramic aggregate and manufacture method thereof |
| CN114349477A (en) * | 2022-01-12 | 2022-04-15 | 湖南国发控股有限公司 | Detoxification formula with high chromium slag amount and process for producing synergistic light aggregate |
| CN114349477B (en) * | 2022-01-12 | 2023-08-25 | 湖南国发控股有限公司 | High chromium slag detoxification formula and synergistic lightweight aggregate production process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85102459B (en) | 1987-10-07 |
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