CN1548564A - Weathered chromium residue detoxicating and utilizing techn - Google Patents
Weathered chromium residue detoxicating and utilizing techn Download PDFInfo
- Publication number
- CN1548564A CN1548564A CNA031250939A CN03125093A CN1548564A CN 1548564 A CN1548564 A CN 1548564A CN A031250939 A CNA031250939 A CN A031250939A CN 03125093 A CN03125093 A CN 03125093A CN 1548564 A CN1548564 A CN 1548564A
- Authority
- CN
- China
- Prior art keywords
- chromium
- weathering
- chromium slag
- detoxifcation
- slag
- Prior art date
- 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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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0463—Hazardous waste
- C04B18/0472—Waste material contaminated by heavy metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1075—Chromium-free or very low chromium-content materials
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The technological process of detoxicating and utilizing weathered chromium residue includes wet ball milling weathered chromium residue, leaching at normal temperature and vacuum suction filtering to extract six-valent chromium; and reducing the residual six-valent chromium in the leached chromium residue chemically into trivalent chromium. The said process can detoxicate and utilize weathered chromium residue resource completely, and the processed weathered chromium residue may be used as light foamed wall material.
Description
The present invention relates to a kind of weathering chromium residue detoxifying resource technology.Its adopts ball milling wet-milling weathering chromium slag, and the tiny weathering chromium slag of granularity is through the leaching of water normal temperature, vacuum filtration, and the sexavalent chrome in the high efficiency extraction chromium slag has lowered chromic content in the chromium slag; Simultaneously, residual hexavalent chrome reduction is a trivalent chromium in the chromium slag that the employing chemical process will be leached, and reaches disposable thorough detoxifcation and handles weathering chromium slag, and make the purpose of its 100% resource utilization.
Found the state so far, existing more than 30 families of the enterprise of China's direct production dichromate, yearly capacity exceedes 300,000 tons, and production technique has generally adopted calcium sinter process technology, and 1 ton of dichromate product of every production just will produce the chromium residue (being called for short the chromium slag) about 3 tons.At present, each producer chromium residue (weathering chromium slag) accumulative total of storing up over the years is not less than 2,000,000 tons.Because of containing the water-soluble sexavalent chrome (violent in toxicity) of 1%-2% in the chromium slag, and become poisonous Hazardous wastes, the processing of chromium slag always is considered to the problem of headache of chromaking industrial and commercial bank industry, also is a global difficult problem.
At present, tens million of tons of chromium residues are distributed in national different province, and the chromium slag of each producer is air storage, and managing more perfect producer has cut-pff wall, antiseepage pond.But because long-term air storage, the chromium slag is directly exposed in the air, under natural environmental condition, expand in chromium slag mountain, volume increases, and cut-pff wall, antiseepage pond are broken, leach the chromate waste water severe contamination surrounding area environment that, the not long vegetables in vegetable plot around the chromium slag, the not long paddy rice in rice field, the sore that is difficult to heal is suffered from the water source of the direct contact infection of peasant; Drink and contain chromic water, brewage disease especially, directly influence people's life security.For example the people live in plenty in Chongqing, and chromium salt factory is located in the upstream, reservoir area of Three Gorges, and the environment hidden danger that the chromium slag brings directly influences the south water to north, consequence is hardly imaginable, arrived must thorough solution stage.
Weathering chromium slag is meant for many years the chromium residue deposited that produces by producing dichromate.Main component is a metal oxide in the chromium slag, and as magnesium oxide etc., under the long term of air, water and temperature, slowly reacting becomes oxyhydroxide, and expansion, caking, efflorescence become the less chromium slag of granularity at last and be called weathering chromium slag.Compare weathering chromium slag with common chromium slag and have characteristics such as granularity is little, matter is soft, light weight.
The weathering chromium slag that the present invention will stack throughout the year adopts ball milling wet-milling refinement, leaching, detoxifcation is disposable finishes, realized innoxious, the resource utilization of Hazardous wastes, refinement weathering chromium slag after detoxifcation is handled can be used as the raw material of light-weight foam materials for wall, directly use, do not need secondary processing, reach the valency approach that weathering chromium slag is handled turns waste into wealth.Simultaneously, environmentally hazardous chromium slag mountain is become the oasis, environmental benefit, obvious social benefit have been filled up domestic blank.
Technical characterstic of the present invention is (1) according to weathering chromium slag fine size, characteristics that hardness is low, adopts ball milling wet-milling refinement chromium slag; (2) the sexavalent chrome time is short in the leaching refinement chromium slag, leaching rate is high, treatment capacity is big; (3) it is fast to adopt the vacuum filtration technology to extract sexavalent chrome speed, the efficient height; (4) employing chemical process normal-temperature reaction, refinement chromium slag is handled in detoxifcation, and the detoxifcation dosing is little, detoxifcation is thorough; (5) weathering chromium slag refinement quickening detoxifcation speed has guaranteed detoxifying effect; (6) the refinement weathering chromium slag after detoxifcation is handled can be directly as the raw material of light-weight foam materials for wall, comprehensive utilization of resources.
The present invention realizes by following measure:
1. weathering chromium slag is handled and is extracted sexavalent chrome weathering chromium slag through ball mill wet-milling, leaching, vacuum filtration, washing, has reduced content of 6-valence Cr ions in the chromium slag, has reduced environmental pollution, has improved the economic benefit of chromium slag.
2. the weathering chromium residue detoxifying is handled
Weathering chromium slag after the leaching adds in the stirred pot simultaneously with the detoxifcation medicament, puts into the detoxifcation pond after stirring, and normal-temperature reaction is carried out weathering chromium slag and thoroughly detoxified.
3. major equipment
Ball mill, stirrer, stirred pot, vacuum filtration device, detoxifcation medicament dissolve still, chromium residue detoxifying pond, storage tank, effluent pipeline, deslagging transfer roller.
4. technical process
(1) successively add ball mill in simultaneously weathering chromium slag and tap water; (2) start the ball mill wet-milling, sieve, blowing;
(3) slurry enters the vacuum filtration machine, and filter is done, and it is standby to storage tank to collect sexavalent chrome solution; (4) in the suction filtration machine, wash the chromium slag with water, collect washings, be used for the ball milling Recycling; (5) filter residue after will washing is put into stirred pot, adds the detoxifcation medicament, puts into the detoxifcation pond after stirring, and thoroughly detoxifies; (6) after detoxifcation was finished, waste discharge, throw out were nontoxic chromium slag; (7) carry nontoxic chromium slag to the raw material place, for next step comprehensive utilization of resources system light-weight foam wall brick standby.
Claims (6)
1. weathering chromium residue detoxifying resource technology.Technical characterictic of the present invention is adopt to adopt ball milling wet-milling weathering chromium slag, and the tiny weathering chromium slag of granularity is through the leaching of water normal temperature, vacuum filtration, and the sexavalent chrome in the high efficiency extraction chromium slag has lowered chromic content in the chromium slag; Simultaneously, residual hexavalent chrome reduction is a trivalent chromium in the chromium slag that the employing chemical process will be leached, and reaches disposable thorough detoxifcation and handles weathering chromium slag, and make the purpose of its 100% resource utilization.
2. by the described a kind of weathering chromium residue detoxifying resource technology of claim 1, it is characterized in that adopting the ball milling wet-grinding technology and relative device, refinement weathering chromium slag.
3. by the described a kind of weathering chromium residue detoxifying resource technology of claim 1, it is characterized in that adopting the vacuum filtration technology, normal temperature is down with sexavalent chrome in the tiny chromium slag of water extraction, speed is fast, the efficient height, and treatment capacity is big, lower chromic content in the weathering chromium slag, reduced environmental pollution.
4. by the described a kind of weathering chromium residue detoxifying resource technology of claim 1, it is characterized in that adopting chemical process, under normal temperature condition, is trivalent chromium with hexavalent chrome reduction residual in the chromium slag that leached, and the detoxifcation dosing is little, detoxifcation is thorough.
5. by the described a kind of weathering chromium residue detoxifying resource technology of claim 1, it is characterized in that the nontoxic poison of dissolving of tiny weathering chromium slag is handled, and make its 100% resource utilization, directly, reach the purpose that turns waste into wealth as the raw material of light-weight foam materials for wall.
6. by the described a kind of weathering chromium residue detoxifying resource technology of claim 1, it is characterized in that successively adding ball mill in simultaneously weathering chromium slag and tap water; Start the ball mill wet-milling, sieve, blowing; Slurry enters the vacuum filtration machine, and filter is done, and it is standby to storage tank to collect sexavalent chrome solution; In the suction filtration machine, wash the chromium slag with water, collect washings, be used for the ball milling Recycling; Filter residue after the washing is put into stirred pot, add the detoxifcation medicament, put into the detoxifcation pond after stirring, thoroughly detoxify; After detoxifcation was finished, waste discharge, throw out were nontoxic chromium slag; Carry nontoxic chromium slag to the raw material place, for next step comprehensive utilization of resources system light-weight foam wall brick standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031250939A CN1548564A (en) | 2003-05-06 | 2003-05-06 | Weathered chromium residue detoxicating and utilizing techn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031250939A CN1548564A (en) | 2003-05-06 | 2003-05-06 | Weathered chromium residue detoxicating and utilizing techn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1548564A true CN1548564A (en) | 2004-11-24 |
Family
ID=34321822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031250939A Pending CN1548564A (en) | 2003-05-06 | 2003-05-06 | Weathered chromium residue detoxicating and utilizing techn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1548564A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629222B (en) * | 2009-08-14 | 2010-09-08 | 吕鲁平 | Method for obtaining chromated nickel base material by treatment of chrome slag with smelting reduction process |
| CN111069261A (en) * | 2019-11-02 | 2020-04-28 | 泗水惠丰农业开发工程有限公司 | Process flow for industrially preparing soil through water filtration and purification |
-
2003
- 2003-05-06 CN CNA031250939A patent/CN1548564A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629222B (en) * | 2009-08-14 | 2010-09-08 | 吕鲁平 | Method for obtaining chromated nickel base material by treatment of chrome slag with smelting reduction process |
| CN111069261A (en) * | 2019-11-02 | 2020-04-28 | 泗水惠丰农业开发工程有限公司 | Process flow for industrially preparing soil through water filtration and purification |
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