CN101585702A - Method for preparing mullite aggregate by using waste sludge of ceramic factory - Google Patents
Method for preparing mullite aggregate by using waste sludge of ceramic factory Download PDFInfo
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- CN101585702A CN101585702A CNA2009100231823A CN200910023182A CN101585702A CN 101585702 A CN101585702 A CN 101585702A CN A2009100231823 A CNA2009100231823 A CN A2009100231823A CN 200910023182 A CN200910023182 A CN 200910023182A CN 101585702 A CN101585702 A CN 101585702A
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- mud
- bauxitic clay
- mullite aggregate
- mullite
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Abstract
The invention discloses a method for preparing mullite aggregate by using waste sludge of a ceramic factory, which comprises the following steps: putting bauxite into a ball mill, dry-milling the bauxite, removing iron by adopting a permanent magnet, then electromagnetically removing the iron, wet-milling the waste sludge of the ceramic factory and the bauxite subjected to iron removal treatment in the ball mill, and evenly mixing the milled materials to form mixed slurry; granulating the mixed slurry by adopting a pressure type spray granulation dryer to form granular powder; putting the granular powder into an alumina crucible, placing the alumina crucible into a silicon-carbon rod resistance furnace, raising the temperature to between 1,100 and 1,300 DEG C, keeping the temperature for 1 to 3 hours, naturally cooling the granular powder, and taking out a sample; and pouring the naturally cooled sample into a material stirrer, and stirring and sieving the sample to obtain the mullite aggregate with different granularities. The method for synthesizing the mullite by using the waste sludge of the ceramic factory is not only favorable for saving natural resources and reducing the production cost, but also favorable for environmental protection. The synthesis temperature is lower than that of the conventional production process, and the mineral resources and energy are saved. By adjusting the mixture ratio of the raw materials, the mullite aggregate with different alumina contents can be synthesized.
Description
Technical field
The present invention relates to utilize the technical field of the synthetic high temperature ceramic material of waste material, particularly utilize ceramics factory's waste mud to be ready for use on the method for the mullite aggregate of refractory materials production.
Background technology
Mullite (3Al
2O
32SiO
2) be the alumina hydrochlorate mineral of aluminium, be Al
2O
3-SiO
2The crystalline compound of system unique stable existence under normal pressure, has the refractoriness height, heat-shock resistance, chemical resistance of concrete, creep-resistant property are good, the refractoriness under load height, volume stability is good, and electrical insulating property is strong etc., it is the ideal high grade refractory, be widely used in industry such as metallurgy, glass, pottery, chemistry, electric power, national defence, combustion gas and cement (old winter, Chen Nanchun. the progress of mullite [J]. mineral products and geology, 2004 (2): 18-22).
The natural mullite mineral of occurring in nature seldom, industrial mullite is mainly synthetic.At present, compound probability with the method for mullite mainly contain electric smelting method and sintering process (Shen Xiaoqing. the preparation research of ultra-fine mullite powder [D]. Zhengzhou University's master thesis, 2002:4-6).The electric smelting method is that the fusion in electric arc of mixed raw material is formed, shortcoming be current consumption big, to synthesis condition requirement harshness; Sintering process by the difference of raw materials used character be divided into inorganic silicon-aluminum gel method, organosilicon alumina gel method and mineral facies political reform (Wei Xiaohui, Sun Jialin, Sun Gengchen. the low temperature of mullite synthesizes [J]. refractory materials, 2008,42 (3): 229-231).Wherein, inorganic silicon-aluminum gel method and organosilicon alumina gel method are to adopt inorganic and organic raw material to make the sial colloid by certain chemical constitution respectively, at high temperature calcining forms then, and its shortcoming is that energy consumption is higher, and the organic raw material that uses in the organic gel method costs an arm and a leg.The mineral facies political reform is to place the kiln high-temperature calcination to form natural mineral such as alumine, kaolin, agalmatolite, the shortcoming of this method is the energy consumption height, because there are bigger difference in its mineral composition and mullite between forming, cause the mullite transformation efficiency not high simultaneously, the waste resource.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency of the prior art, a kind of method of utilizing ceramics factory's waste mud to be equipped with mullite aggregate is provided.Not only raw material sources are extensive, production cost is low for this method, energy consumption is little, and turn waste into wealth, and can produce remarkable economical and environmental benefit.
For achieving the above object, the technical solution used in the present invention is:
1) at first, bauxitic clay is put into ball mill for dry grinding, cross 120 mesh sieves then, the bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 0.5～2 is mixed and made into compound and compound is put into ball mill wet-milling mixing and forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 110～300 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1100～1300 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 1～3h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 20～100 mesh sieves after, promptly get different grain size and salic massfraction and be 30～65% mullite aggregate.
Dry grinding in the step 1) of the present invention is to utilize the alumina balls masonry to be grinding medium, and the mass ratio of control abrading-ball and bauxitic clay is 2～3: 1, and milling time is 1～4h; Step 2) wet-milling in is to utilize the alumina balls masonry to be grinding medium, and the mass ratio of control abrading-ball, compound and water is 2～3: 1: 1, milling time was 0.5～3h.
Effect of the present invention is embodied in:
(1) main raw material is the solid waste that ceramics factory eluriates raw material and flush equipment discharge, not only helps to save natural resource with the useless mud mullite synthesizing of ceramics factory, reduces production costs, and helps environment protection;
(2) synthesis temperature all is lower than traditional processing technology, has saved the mineral wealth and the energy;
(3) by regulating proportioning raw materials, can the different mullite aggregate of borolon content.
Embodiment
Embodiment 1:
1) at first, bauxitic clay is put into ball mill for dry grinding, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 2: 1, and milling time is 1h, crosses 120 mesh sieves then, bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 1 is mixed and made into compound and compound is put into ball mill wet-milling mixing, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 2: 1: 1, and milling time is that 1h forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 120 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1100 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 3h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 80 mesh sieves after, promptly get salic massfraction greater than 30% mullite aggregate.
Embodiment 2:
1) at first, bauxitic clay is put into ball mill for dry grinding, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 2.5: 1, and milling time is 3h, crosses 120 mesh sieves then, bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 0.5 is mixed and made into compound and compound is put into ball mill wet-milling mixing, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 2.8: 1: 1, and milling time is that 2h forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 180 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1300 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 1h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 50 mesh sieves after, promptly get salic massfraction greater than 30% mullite aggregate.
Embodiment 3:
1) at first, bauxitic clay is put into ball mill for dry grinding, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 3: 1, and milling time is 4h, crosses 120 mesh sieves then, bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 2 is mixed and made into compound and compound is put into ball mill wet-milling mixing, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 2.5: 1: 1, and milling time is that 0.5h forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 230 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1200 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 2h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 100 mesh sieves after, promptly get salic massfraction greater than 30% mullite aggregate.
Embodiment 4:
1) at first, bauxitic clay is put into ball mill for dry grinding, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 2.3: 1, and milling time is 2h, crosses 120 mesh sieves then, bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 1.3 is mixed and made into compound and compound is put into ball mill wet-milling mixing, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 2.3: 1: 1, and milling time is that 3h forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 110 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1150 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 2.5h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 70 mesh sieves after, promptly get salic massfraction greater than 30% mullite aggregate.
Embodiment 5:
1) at first, bauxitic clay is put into ball mill for dry grinding, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 2.8: 1, and milling time is 4h, crosses 120 mesh sieves then, bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 1.7 is mixed and made into compound and compound is put into ball mill wet-milling mixing, utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 3: 1: 1, and milling time is that 1.5h forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 300 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1250 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 1.5h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 20 mesh sieves after, promptly get salic massfraction greater than 30% mullite aggregate.
Claims (3)
1, a kind of method of utilizing ceramics factory's waste mud to be equipped with mullite aggregate is characterized in that:
1) at first, bauxitic clay is put into ball mill for dry grinding, cross 120 mesh sieves then, the bauxitic clay after sieving is adopted the permanent magnet deironing, adopt the electromagnetism deironing again, make Fe in the bauxitic clay
2O
3Content be lower than 0.5%;
2) secondly, get useless mud of ceramics factory and above-mentioned bauxitic clay after deironing is handled with useless mud: the mass ratio of bauxitic clay=1: 0.5～2 is mixed and made into compound and compound is put into ball mill wet-milling mixing and forms mixing mud;
3) then, above-mentioned mixing mud is adopted the granulation of press spray granulating and drying machine, the temperature in of mixing mud is 110～300 ℃, forms the particulate state powder;
4) the particulate state powder behind the mist projection granulating is put into alumina crucible, and place in the globars resistance furnace, be warming up to 1100～1300 ℃ with the rate of heating of 5 ℃/min by room temperature, insulation 1～3h takes out sample behind the naturally cooling;
5) last, the sample behind the naturally cooling poured in the material agitator stirs, cross 20～100 mesh sieves after, promptly get different grain size and salic massfraction and be 30～65% mullite aggregate.
2, the method for utilizing ceramics factory's waste mud to be equipped with mullite aggregate according to claim 1, it is characterized in that: the dry grinding in the described step 1) is to utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball and bauxitic clay is 2～3: 1, and milling time is 1～4h.
3, the method for utilizing ceramics factory's waste mud to be equipped with mullite aggregate according to claim 1, it is characterized in that: the wet-milling described step 2) is to utilize the alumina balls masonry to be grinding medium, the mass ratio of control abrading-ball, compound and water is 2～3: 1: 1, milling time was 0.5～3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100231823A CN101585702B (en) | 2009-07-03 | 2009-07-03 | Method for preparing mullite aggregate by using waste sludge of ceramic factory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100231823A CN101585702B (en) | 2009-07-03 | 2009-07-03 | Method for preparing mullite aggregate by using waste sludge of ceramic factory |
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|---|---|
| CN101585702A true CN101585702A (en) | 2009-11-25 |
| CN101585702B CN101585702B (en) | 2012-05-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153681A (en) * | 2020-01-07 | 2020-05-15 | 湖南泰鑫瓷业有限公司 | Argil prepared from waste materials and preparation method thereof |
-
2009
- 2009-07-03 CN CN2009100231823A patent/CN101585702B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111153681A (en) * | 2020-01-07 | 2020-05-15 | 湖南泰鑫瓷业有限公司 | Argil prepared from waste materials and preparation method thereof |
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| CN101585702B (en) | 2012-05-23 |
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