CN101475325A - Method for producing cement clinker from stainless steel cold rolling dewatered sludge ingredient - Google Patents
Method for producing cement clinker from stainless steel cold rolling dewatered sludge ingredient Download PDFInfo
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- CN101475325A CN101475325A CNA2009101050543A CN200910105054A CN101475325A CN 101475325 A CN101475325 A CN 101475325A CN A2009101050543 A CNA2009101050543 A CN A2009101050543A CN 200910105054 A CN200910105054 A CN 200910105054A CN 101475325 A CN101475325 A CN 101475325A
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- cement
- stainless steel
- steel cold
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- clinker
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a method for producing cement clinker through utilization of a stainless steel cold-rolled dehydrated sludge ingredient. The method comprises that: stainless steel cold-rolled dehydrated sludge and other materials of a cement green stock are evenly mixed to prepare the cement green stock; the cement green stock comprises the following compositions in percentage by weight: 70 to 79 percent of limestone, 10 to 14 percent of clay, 1 to 8 percent of the stainless steel cold-rolled dehydrated sludge, 5.3 percent of coal ash, 0 to 3 percent of iron ore powder and 0 to 0.5 percent of gypsum; and the prepared cement green stock is sintered to form silicate cement clinker. The obtained cement clinker and a corresponding cement product have no essential difference with the prior silicate cement clinker and a cement product in composition and performance; the quality of the cement clinker and the corresponding cement product meets the index requirement of national corresponding product standard and can be used as a normal high-quality commodity; and the method effectively utilizes and processes industrial sludge containing harmful metal elements, achieves the effects of resource optimization and utilization and has remarkable environment-friendly benefit.
Description
Technical field
The invention belongs to the comprehensive utilization field of danger wastes, be specifically related to the method for comprehensive utilization of stainless steel cold rolling dewatered sludge.
Background technology
Stainless steel cold rolling dewatered sludge also contains a certain amount of impurity element chromium, nickel and fluorine except that containing more calcium oxide, ferric oxide, the environmental pollution damage of its discharging is obvious.Be mainly landfill method, burning method by the traditional method of disposal of general industry waste sludge.These methods of disposal can cause the secondary pollution of poisonous metal element to soil and water source, have great potential risk, and the once investment of above-mentioned treatment process simultaneously is also very big, and processing cost is very high.
In the production method of silicate cement, its grog all is that calcining forms through high temperature kiln by raw material, and the grog firing temperature is generally at 1450 ℃, and the process that the while grog burns till is longer.Therefore cement kiln has characteristics such as thermal capacity is big, operating mode stable, high-temperature alkaline atmosphere.
Summary of the invention
The objective of the invention is to the problems referred to above and limitation at the traditional treatment method existence of industrial waste mud, a kind of method of utilizing stainless steel cold rolling dewatered sludge ingredient to produce cement clinker is provided, when firing qualified cement clinker, realizes the harmless treatment of stainless steel cold rolling dewatered sludge.
The object of the present invention is achieved like this: method of the present invention is that other raw material with stainless steel cold rolling dewatered sludge and cement slurry mixes and is made into cement slurry, the consisting of of cement slurry (by weight percentage): Wingdale 70%～79%, clay 10%～14%, stainless steel cold rolling dewatered sludge 1%～8%, coal ash 5.3%, powdered iron ore 0～3%, gypsum 0～0.5%; The cement slurry that is made into is fired into Portland clinker.
The water ratio of described stainless steel cold rolling dewatered sludge is 16%～18% preferable, and this moment, the mud appearance was comparatively hard, the convenient conveying and storage.The water content of stainless-steel cold-rolling original state mud is higher, must natural air drying or the dehydration of employing alternate manner.
The present invention is owing to added stainless steel cold rolling dewatered sludge in the batching of cement slurry, the calcining temperature that cement slurry is fired into Portland clinker can be low to moderate 1350～1400 ℃.
Principle of the present invention is as follows:
Though 1, the waste water dewatered sludge of stainless-steel cold-rolling processing generation contains a certain amount of chromium, nickel metallic element and fluorochemical, simultaneously its CaO, Fe
2O
3Content is higher, and the latter is consistent with silicate cement raw material chemical composition in theory.The present invention allocates this mud into raw material as calcium, irony alternative materials and participates in calcining, combustibleconstituents in the mud is fully burned, simultaneously because the specific high-temperature physics chemical reaction condition that cement clinker forms, make component such as calcium, iron in the mud participate in the synthetic of clinker mineral, and wherein unwanted component such as foreign metal and fluorine element also can solid solution in clinker mineral structure and high-temperature liquid-phase, realize stable curing.
2, the inventive method is according to the chemical ingredients mobility scale of this mud, according to the conventional formulation of silicate cement raw material components such as this mud and Wingdale, clay are mixed with cement slurry by suitable proportion, the theoretical rate value of cement clinker is controlled to be: KH (lime saturation degree): 0.90～0.95, SM (silicon rate): 1.9～2.2, IM (aluminium rate): 1.6～1.9.Because the particle very tiny (median size is 8.93um) of stainless steel cold rolling dewatered sludge, calcareous component reaction activity wherein is higher, components such as iron, fluorine also have tangible mineralization simultaneously, obviously improve the burn-ability of raw material, so under the condition that does not change existing technology of cement producing line and equipment, the clinker burning temperature can be reduced to 1400 ℃, can save and burn till hear rate.The kiln system thermal regulation is stable, and calcination operation is easy to control.
The cement clinker sintering that burns out by the inventive method in order, free calcium oxide content is low.The chemical composition range of grog is: CaO:60%～62%, SiO
2: 18%～20%, Al
2O
3: 5%～6%, Fe
2O
3: 2.7%～3.1%, MgO:1%～1.5%.Mineral composition: C
3S:55%～65%, C
2S:6%～12%, C
3A:8%～10%, C
4AF:8%～9%.Carry out a complete set of cement clinker according to GBT21372-2008 (portland cement clinker standard) and detect, every index all meets the relevant criterion requirement, reaches 52.5 grades of commodity grog grades.The PC32.5 grade composite silicate cement that the grog of producing with the inventive method and volcanic ash, Wingdale, gypsum etc. are prepared, every index all reaches corresponding R type cement quality parameter.
Metal Cr content is 0.18%～0.47% in the grog that the inventive method is produced, Ni content is 0.03%～0.06%, detect heavy metal content in its leach liquor by GB5085.3-2007 (Hazardous wastes judging standard leach toxicity differentiate), all well below the index request of corresponding GB.The PC32.5R cement that this grog is prepared carries out poisonous metal toxicity leaching detection, and therefore chromium nickel leaching amount can avoid the secondary pollution of poisonous metal element also far below the respective country standard-required.
Technique effect of the present invention is: resulting cement clinker of the inventive method and corresponding cement products and conventional Portland clinker and cement products do not have essential distinction on composition and performance, quality all meets the index request of national corresponding product standard, can use as normal best buy, and the present invention can make the clinker burning temperature reduce, and saves and burns till hear rate; The present invention effectively utilizes and has handled simultaneously the industrial sludge that contains the poisonous metal element.The present invention burns to compare with traditional burying method and special-purpose incinerator not only has reduced investment, the advantage that working cost is low, and what is more important is fully thorough to the harmless treatment of mud, has reached the effect of optimizing network resource utilization, and environmental benefit is remarkable.
Embodiment
Embodiment one:
On cement producing line, be raw material with Wingdale, clay, stainless steel cold rolling dewatered sludge (hereinafter to be referred as " mud "), powdered iron ore, coal ash, prepare 80 tons of cement slurries by following weight percentage: Wingdale 78.6%, clay 12.5%, mud 1%, powdered iron ore 2.2%, coal dust 5.3%, the cement slurry that is made into after above-mentioned raw materials mixed adopt existing technology and equipment to burn till Portland clinker under 1400 ℃.The every performance index of the Portland clinker that obtains all reach 525 label commodity grog quality requirements of GB/T21372-2008 (portland cement clinker standard) regulation, and can stably manufactured high-quality PC (composite Portland cement) 32.5R cement products.The leaching toxicity inspection of poisonous metal chromium, nickel meets the harmless index of GB5085.3-2007 (the Hazardous wastes judging standard leaches toxicity and differentiates) in the cement clinker, and the leach liquor total chrome content only is 0.023mg/L, nickel 0.0055mg/L (ICP detection limit).
The water ratio of the stainless steel cold rolling dewatered sludge that adopts among the embodiment one is 16%, is to be got by stainless-steel cold-rolling waste water dewatered sludge natural air drying.
Embodiment two:
On cement producing line, raw material is prepared 300 tons of cement slurries by following weight percentage: Wingdale 75%, clay 10.0%, mud 5.5%, coal ash 5.3%, gypsum 0.5%, adopt existing technology and equipment to burn till Portland clinker at 1350 ℃ cement slurry, every performance index of Portland clinker all reach 525 label commodity grog quality requirements of GBT21372-2008 (portland cement clinker standard) regulation, and its folding strength: 3 days is 6.0MPa; 28 days is 8.8MPa; Ultimate compression strength: 3 days is 30.7MPa, and 28 days is 55.8MPa, and its mineralogical composition is f-CaO:0.61%; C
3S+C
2S:72.4%; CaO/SiO
2: 3.13%, also satisfy the relevant criterion requirement.The leaching toxicity inspection of heavy metal chromium, nickel meets the harmless index of GB5085.3-2007 (the Hazardous wastes judging standard leaches toxicity and differentiates) in the cement clinker, and it only is 0.026mg/L that heavy metal liquid leaches total chrome content, nickel 0.0055mg/L (ICP detection limit).
The water ratio of the stainless steel cold rolling dewatered sludge that adopts among the embodiment two is 18%, is to be got by stainless-steel cold-rolling waste water dewatered sludge natural air drying.
Embodiment three:
On cement producing line, raw material is prepared 80 tons of cement slurries by following weight percentage: Wingdale 74.1%, clay 12.6%, mud 8%, coal ash 5.3%, adopt existing technology and equipment to burn till Portland clinker the cement slurry that is made at 1400 ℃, the corresponding rate value of cement clinker is: KH:0.95, SM:1.98, IM:1.6, every performance index of Portland clinker all reach 525 label commodity grog quality requirements of GB/T21372-2008 (portland cement clinker standard) regulation, and can stably manufactured high-quality PC (composite Portland cement) 32.5R cement products.The leaching toxicity inspection of poisonous metal chromium, nickel meets the harmless index of GB5085.3-2007 (the Hazardous wastes judging standard leaches toxicity and differentiates) in the cement clinker, and total chromium and nickel content all do not exceed standard-required in the leach liquor.
The water ratio of the stainless steel cold rolling dewatered sludge that adopts among the embodiment three is 17%, is to be got by stainless-steel cold-rolling waste water dewatered sludge natural air drying.
Embodiment four:
Cement clinker with the foregoing description gained, press following part by weight mixed preparing silicate cement: cement clinker 75.5%, volcanic ash blended material 16%, Wingdale blended material 5%, dihydrate gypsum 3.5%, the PC32.5R silicate cement that makes carries out a complete set of quality inspection according to the GB175-2008 standard to it, and the anti-folding and the ultimate compression strength of cement are respectively: 3 days folding strengths are 4.5Mpa～4.4Mpa; 28 days folding strengths are 7.4Mpa～7.6Mpa, and 3 days ultimate compression strength is 19.9MPa～20.1MPa, and 28 days ultimate compression strength is 37.5MPa～38.2MPa, and all other indexs all reach the respective country standard-required.
Claims (3)
1. method of utilizing stainless steel cold rolling dewatered sludge ingredient to produce cement clinker, it is characterized in that other raw material with stainless steel cold rolling dewatered sludge and cement slurry mixes is made into cement slurry, the composition of cement slurry is by weight percentage: Wingdale 70%～79%, clay 10%～14%, stainless steel cold rolling dewatered sludge 1%～8%, coal ash 5.3%, powdered iron ore 0～3%, gypsum 0～0.5%; The cement slurry that is made into is fired into Portland clinker.
2. the method for utilizing stainless steel cold rolling dewatered sludge ingredient to produce cement clinker according to claim 1, it is characterized in that: the water ratio of described stainless steel cold rolling dewatered sludge is 16%～18%.
3. the method for utilizing stainless steel cold rolling dewatered sludge ingredient to produce cement clinker according to claim 1 and 2, it is characterized in that: the calcining temperature that cement slurry is fired into Portland clinker is 1350～1400 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101050543A CN101475325A (en) | 2009-01-14 | 2009-01-14 | Method for producing cement clinker from stainless steel cold rolling dewatered sludge ingredient |
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|---|---|---|---|
| CNA2009101050543A CN101475325A (en) | 2009-01-14 | 2009-01-14 | Method for producing cement clinker from stainless steel cold rolling dewatered sludge ingredient |
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|---|---|
| CN101475325A true CN101475325A (en) | 2009-07-08 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043927A (en) * | 2013-01-30 | 2013-04-17 | 湖北理工学院 | Method for preparing silicate cement by using lake sediment containing heavy metals |
| CN103898024A (en) * | 2014-04-03 | 2014-07-02 | 普罗生物技术（上海）有限公司 | Cultivation method of system volatile mixed organic waste gas strain for treating petrochemical wastewater |
| CN106186747A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare high strength clinker |
| CN106186746A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare clinker |
| CN109206026A (en) * | 2017-06-30 | 2019-01-15 | 润泰精密材料股份有限公司 | Environmentally friendly Portland (Portland) cement, preparation method and its application |
| CN111847955A (en) * | 2020-07-01 | 2020-10-30 | 清远市博发环保科技有限公司 | Manufacturing process of cement clinker additive by using stainless steel acid-washing sludge |
| CN114057416A (en) * | 2021-11-03 | 2022-02-18 | 同济大学 | Preparation method for firing portland cement clinker by using sludge incineration ash |
| CN114262169A (en) * | 2022-01-03 | 2022-04-01 | 何九荣 | High-strength cement preparation system and preparation method |
-
2009
- 2009-01-14 CN CNA2009101050543A patent/CN101475325A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043927A (en) * | 2013-01-30 | 2013-04-17 | 湖北理工学院 | Method for preparing silicate cement by using lake sediment containing heavy metals |
| CN103898024A (en) * | 2014-04-03 | 2014-07-02 | 普罗生物技术（上海）有限公司 | Cultivation method of system volatile mixed organic waste gas strain for treating petrochemical wastewater |
| CN103898024B (en) * | 2014-04-03 | 2016-05-18 | 普罗生物技术（上海）有限公司 | A kind of cultural method of processing petrochemical wastewater system volatile mixed organic exhaust gas bacterial classification |
| CN106186747A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare high strength clinker |
| CN106186746A (en) * | 2016-06-30 | 2016-12-07 | 浙江新业管桩有限公司 | A kind of method utilizing printing and dyeing sludge to prepare clinker |
| CN109206026A (en) * | 2017-06-30 | 2019-01-15 | 润泰精密材料股份有限公司 | Environmentally friendly Portland (Portland) cement, preparation method and its application |
| CN109206026B (en) * | 2017-06-30 | 2021-12-24 | 润泰精密材料股份有限公司 | Environment-friendly Portland (Portland) cement, preparation method and application thereof |
| CN111847955A (en) * | 2020-07-01 | 2020-10-30 | 清远市博发环保科技有限公司 | Manufacturing process of cement clinker additive by using stainless steel acid-washing sludge |
| CN114057416A (en) * | 2021-11-03 | 2022-02-18 | 同济大学 | Preparation method for firing portland cement clinker by using sludge incineration ash |
| CN114262169A (en) * | 2022-01-03 | 2022-04-01 | 何九荣 | High-strength cement preparation system and preparation method |
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Application publication date: 20090708 |