CN104028538A - Acidified red mud - Google Patents
Acidified red mud Download PDFInfo
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- CN104028538A CN104028538A CN201410237838.2A CN201410237838A CN104028538A CN 104028538 A CN104028538 A CN 104028538A CN 201410237838 A CN201410237838 A CN 201410237838A CN 104028538 A CN104028538 A CN 104028538A
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- red mud
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- sulfuric acid
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Abstract
The invention discloses acidified red mud. The acidified red mud is characterized in that ingredients thereof consist of red mud, attapulgite clay, magnesium oxide, sulfuric acid, instant sodium silicate, polyvinyl alcohol, hydroxypropyl methyl cellulose and sodium carbonate. A production method of the acidified red mud comprises the following steps: the acidified ingredients of the red mud are input in a mill for grinding powder; and the grinded powder is the acidified red mud. The production method of the acidified red mud performs composite burdening after acidification to prevent chemical reaction of the sulfuric acid with the instant sodium silicate, the polyvinyl alcohol, the hydroxypropyl methyl cellulose and the sodium carbonate; after the red mud is acidified, the utilization rate of the red mud can be improved; excellent economic benefit, environmental benefit and social benefit can be brought; and wastes can be changed into wealth. The acidified red mud has the characteristics of better thixotropy, heat stability, plasticity and cohesiveness and high dry pressing strength, and is suitable for producing building materials, foaming agent and fire products.
Description
Technical field
The present invention relates to acidification, be specifically related to the red mud after a kind of acidifying.
Background technology
The contaminative waste residue of discharging when red mud is aluminium industry extraction aluminium oxide, 1 ton of aluminium oxide of the every production of average, 1.0～2.0 tons of red muds of subsidiary generation.The pH value of red mud is 10～12, and China is as large alumina producing state of the world the 4th, and the red mud of annual discharge is up to millions of tons.A large amount of red muds can not fully effectively utilize, can only rely on large-area stockyard to stack, a large amount of soils are taken, the production on the mankind of the generation of red mud, life cause directly many-sided and indirectly impact, so reduce to greatest extent output and the harm of red mud, realization by all kinds of means, the resource of quantity is extremely urgent greatly.
Summary of the invention
The object of the invention is to overcome weak point in prior art, the red mud after a kind of acidifying is provided.
Red mud batching after acidifying is made up of red mud, Concave-convex clay rod, magnesia, sulfuric acid, quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate.
The production method of the red mud after acidifying: by abrasive dust in the red mud batching input grinding machine after acidifying, the powder after abrasive dust is the red mud after acidifying.
China is alumina producing big country, within 2009, produces 2,378 ten thousand tons, aluminium oxide, accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation.China's red mud comprehensive utilization ratio is only 4% at present, and accumulation volume of cargo in storage reaches 200,000,000 tons.Along with the reduction gradually of increase year after year and the bauxite grade of China's aluminium oxide output, a year generation for red mud also will constantly increase, and expect 2015, and red mud accumulative total volume of cargo in storage will reach 3.5 hundred million tons.
Concave-convex clay rod has unique layer chain structure feature, and crystal is needle-like, fibrous or fiber collection shape.Concave-convex clay rod has unique dispersion, high temperature resistant, the anti-good colloidal nature such as saline and alkaline and higher adsorption capacity, and has certain plasticity and cohesive force.
Magnesia has the general character of basic anhydride, belongs to Binder Materials, can improve the colloidal property of red mud.
It is 98% the concentrated sulfuric acid that sulfuric acid is selected concentration.
Quick dissolved sodium silicate is white granular material, can be dissolved in fast water, has that cohesive force is strong, intensity is higher, acid resistance, good heat resistance, the feature of alkali resistance and poor water resistance.
Polyethenol series white solid, that external form is divided is cotton-shaped, graininess, Powdered three kinds; Nonpoisonous and tasteless, graininess can be dissolved in 80--90 DEG C of water, pulverously after other powders pre-dispersed, can dissolve at normal temperatures.There is good viscosity, polymerism, caking property and water-retaining property.
Hydroxypropyl methylcellulose has thickening capabilities, salt discharge, pH stability, water-retaining property, dimensional stability, good film forming and the feature such as resistance to enzyme, dispersiveness and caking property widely.
Sodium carbonate has the general character and the heat endurance of salt, soluble in water, and its aqueous solution is alkalescence, in the present invention for adjusting the red mud pH value after acidifying.
The present invention is achieved by following technical proposals:
1, the batching of the red mud after acidifying is made up of following component by weight percentage: red mud semi-finished product 90～98%, quick dissolved sodium silicate 0.1～5%, polyvinyl alcohol 0.1～5%, hydroxypropyl methylcellulose 0.01～3% and sodium carbonate 0～3% after acidifying.
2, the production method of the red mud after acidifying: by abrasive dust in the red mud batching input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the red mud finished product after acidifying.
3, the half-finished production method of the red mud after acidifying: stir in the mixer (1) input of the batching of red mud mixture having been turned round, then dilute sulfuric acid is slowly added and carries out acidification in red mud mixture; (2) by the red mud mixture after acidification, push as red mud tablet thickness≤3 millimeter of red mud tablet by twin rollers; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 1～3 hour, and sintering temperature is controlled at 250～350 DEG C, red mud tablet water content≤5% after roasting, red mud tablet after roasting is the red mud semi-finished product after acidifying, and PCm is weight percentage.
4, the batching of red mud tablet is made up of following component by weight percentage: red mud mixture 75～95% and dilute sulfuric acid 5～25%.
5, the batching of red mud mixture is made up of following component by weight percentage: red mud 68～92%, Concave-convex clay rod 5～30% and magnesia 0.1～3%.
6, the batching of dilute sulfuric acid is made up of following component by weight percentage: the concentrated sulfuric acid 1～25% that concentration is 98% and water 75～99%, the concentrated sulfuric acid percentage that concentration is 98% is weight percentage.
The production method of the red mud after acidifying takes first acidifying to carry out compounding ingredient again, can avoid sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction, give full play to raw-material characteristic separately in batching, and obtain complementation, guarantee the red mud inherent quality after acidifying.
According to the needs of product quality, adopt sodium carbonate to adjust the red mud pH value after acidifying, method is simple.
After the acidified processing of red mud, red mud pH value is controlled at 6.5～7.5, can improve the utilization rate of red mud, not only can bring good economic benefit, environmental benefit and social benefit, and can realize and turning waste into wealth.
Red mud after acidifying has good thixotropy, heat endurance, plasticity, caking property and the high feature of dry-pressing intensity.
Red mud after acidifying is applicable to produce construction material, blowing agent and fire product.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
1, the batching of the red mud after acidifying is made up of following component by weight percentage: red mud semi-finished product 96%, quick dissolved sodium silicate 2%, polyvinyl alcohol 1.5%, hydroxypropyl methylcellulose 0.5% and sodium carbonate 0% after acidifying.
2, the production method of the red mud after acidifying: by abrasive dust in the red mud batching input grinding machine after acidifying, grain fineness≤0.074 millimeter, the powder after abrasive dust is the red mud finished product after acidifying.
3, the half-finished production method of the red mud after acidifying: stir in the mixer (1) input of the batching of red mud mixture having been turned round, then dilute sulfuric acid is slowly added and carries out acidification in red mud mixture; (2) by the red mud mixture after acidification, push as red mud tablet thickness≤3 millimeter of red mud tablet by twin rollers; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 2 hours, and sintering temperature is controlled at 280～320 DEG C, red mud tablet water content≤5% after roasting, and the red mud tablet after roasting is the red mud semi-finished product after acidifying.
4, the batching of red mud tablet is made up of following component by weight percentage: red mud mixture 88% and dilute sulfuric acid 12%.
5, the batching of red mud mixture is made up of following component by weight percentage: red mud 82%, Concave-convex clay rod 16% and magnesia 2%.
6, the batching of dilute sulfuric acid is made up of following component by weight percentage: the concentrated sulfuric acid 8% that concentration is 98% and water 92%.
Claims (6)
1. the red mud after an acidifying, it is characterized in that, the red mud batching after acidifying is made up of following component by weight percentage: red mud semi-finished product 90～98%, quick dissolved sodium silicate 0.1～5%, polyvinyl alcohol 0.1～5%, hydroxypropyl methylcellulose 0.01～3% and sodium carbonate 0～3% after acidifying.
2. the production method of the red mud after acidifying according to claim 1, is characterized in that, by abrasive dust in the red mud batching input grinding machine after acidifying, and grain fineness≤0.074 millimeter, the powder after abrasive dust is the red mud finished product after acidifying.
3. the half-finished production method of red mud after acidifying according to claim 1, is characterized in that, stirs, then dilute sulfuric acid is slowly added and in red mud mixture, carries out acidification in the mixer (1) input of the batching of red mud mixture having been turned round; (2) by the red mud mixture after acidification, push as red mud tablet thickness≤3 millimeter of red mud tablet by twin rollers; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 1～3 hour, and sintering temperature is controlled at 250～350 DEG C, red mud tablet water content≤5% after roasting, and the red mud tablet after roasting is the red mud semi-finished product after acidifying.
4. the batching of red mud tablet according to claim 3, is characterized in that, the batching of red mud tablet is made up of following component by weight percentage: red mud mixture 75～95% and dilute sulfuric acid 5～25%.
5. the batching of red mud mixture according to claim 4, is characterized in that, the batching of red mud mixture is made up of following component by weight percentage: red mud 68～92%, Concave-convex clay rod 5～30% and magnesia 0.1～3%.
6. the batching of dilute sulfuric acid according to claim 4, is characterized in that, the batching of dilute sulfuric acid is made up of following component by weight percentage: the concentrated sulfuric acid 1～25% that concentration is 98% and water 75～99%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410237838.2A CN104028538B (en) | 2014-06-01 | 2014-06-01 | Red mud after acidifying |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410237838.2A CN104028538B (en) | 2014-06-01 | 2014-06-01 | Red mud after acidifying |
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| Publication Number | Publication Date |
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| CN104028538A true CN104028538A (en) | 2014-09-10 |
| CN104028538B CN104028538B (en) | 2016-04-06 |
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| CN201410237838.2A Active CN104028538B (en) | 2014-06-01 | 2014-06-01 | Red mud after acidifying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975284B2 (en) | 2018-02-06 | 2021-04-13 | Southwest Petroleum University | Well cementation working solution prepared from red mud, slag and waste drilling fluids |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164515A (en) * | 1996-05-07 | 1997-11-12 | 姚克瑜 | Red mud recovery and utilization technology |
| KR20130066717A (en) * | 2011-12-13 | 2013-06-21 | 한국세라믹기술원 | Manufacturing method of alumina using waste aluminum solution |
| CN103290206A (en) * | 2013-06-14 | 2013-09-11 | 中南大学 | Efficient composite additive for separating iron and aluminium from red mud and application |
| US20130263758A1 (en) * | 2012-04-10 | 2013-10-10 | Charles Skoda | Stabilized red mud and methods of making the same |
| CN103787565A (en) * | 2012-11-01 | 2014-05-14 | 贵州新矿源赤泥综合利用开发有限公司 | Red mud roasting reacting furnace |
-
2014
- 2014-06-01 CN CN201410237838.2A patent/CN104028538B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1164515A (en) * | 1996-05-07 | 1997-11-12 | 姚克瑜 | Red mud recovery and utilization technology |
| KR20130066717A (en) * | 2011-12-13 | 2013-06-21 | 한국세라믹기술원 | Manufacturing method of alumina using waste aluminum solution |
| US20130263758A1 (en) * | 2012-04-10 | 2013-10-10 | Charles Skoda | Stabilized red mud and methods of making the same |
| CN103787565A (en) * | 2012-11-01 | 2014-05-14 | 贵州新矿源赤泥综合利用开发有限公司 | Red mud roasting reacting furnace |
| CN103290206A (en) * | 2013-06-14 | 2013-09-11 | 中南大学 | Efficient composite additive for separating iron and aluminium from red mud and application |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10975284B2 (en) | 2018-02-06 | 2021-04-13 | Southwest Petroleum University | Well cementation working solution prepared from red mud, slag and waste drilling fluids |
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| CN104028538B (en) | 2016-04-06 |
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Effective date of registration: 20191202 Address after: 315000 building 1803, Lanting garden, Meixu street, hi tech Zone, Ningbo City, Zhejiang Province Patentee after: Ningbo Qilan Culture Development Co.,Ltd. Address before: 211700 Huaian, Xuyi province Timor King international residential area, building 2, unit 202 room 18 Patentee before: Xu Shengying |
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Effective date of registration: 20191216 Address after: 313000 No. 333 Liji East Road, Zhili Town, Wuxing District, Huzhou City, Zhejiang Province Patentee after: ZHEJIANG LONGYING PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 315000 building 1803, Lanting garden, Meixu street, hi tech Zone, Ningbo City, Zhejiang Province Patentee before: Ningbo Qilan Culture Development Co.,Ltd. |
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Denomination of invention: Acidified red mud Effective date of registration: 20230413 Granted publication date: 20160406 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG LONGYING PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Registration number: Y2023110000157 |