CN104028538B - Red mud after acidifying - Google Patents
Red mud after acidifying Download PDFInfo
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- CN104028538B CN104028538B CN201410237838.2A CN201410237838A CN104028538B CN 104028538 B CN104028538 B CN 104028538B CN 201410237838 A CN201410237838 A CN 201410237838A CN 104028538 B CN104028538 B CN 104028538B
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- China
- Prior art keywords
- red mud
- acidifying
- batching
- sulfuric acid
- tablet
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 33
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 18
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 9
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 8
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 8
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 8
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 7
- 239000004927 clay Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000020477 pH reduction Effects 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000004604 Blowing Agent Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000004035 construction material Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 14
- 239000000463 material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses the red mud after a kind of acidifying, the main points of its technical scheme are, the 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.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; After the acidified process of red mud, the utilization rate of red mud can be improved, not only can bring good economic benefit, environmental benefit and social benefit, and can realize turning waste into wealth.Red mud after acidifying has the high feature of good thixotropy, heat endurance, plasticity, caking property and dry compression.Red mud after acidifying is applicable to produce construction material, blowing agent and fire product.
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, average often produces 1 ton of aluminium oxide, incidentally produces 1.0 ~ 2.0 tons of red muds.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, large-area stockyard can only be relied on to stack, occupy a large amount of soil, the generation of red mud causes directly many-sided on the production of the mankind, life and indirectly affects, so reduce output and the harm of red mud to greatest extent, realize 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.Current China red mud comprehensive utilization ratio is only 4%, and accumulation volume of cargo in storage reaches 200,000,000 tons.Along with the reduction gradually of growth and the bauxite grade year by year of China's aluminium oxide output, the year generation of red mud also will constantly increase, and expect 2015, and red mud adds up 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, threadiness or fiber collection shape.Concave-convex clay rod has unique dispersion, high temperature resistant, anti-good colloidal nature and the higher adsorption capacity such as saline and alkaline, 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.
Sulfuric acid select concentration be 98% the concentrated sulfuric acid.
Quick dissolved sodium silicate is white powder material, can rapid solution in water, have 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, external form divide cotton-shaped, graininess, Powdered three kinds; Nonpoisonous and tasteless, graininess can be dissolved in 80--90 DEG C of water, pulverous other powders pre-dispersed after 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, excellent film forming and the feature such as resistance to enzymatic, 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 red mud batching after acidifying is made up of following component by weight percentage: the red mud semi-finished product 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, hydroxypropyl methylcellulose 0.01 ~ 3% and sodium carbonate 0 ~ 3%.
The production method of the red mud 2, 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 operated, then dilute sulfuric acid is slowly added in red mud mixture carry out acidification; (2), by the red mud mixture after acidification, be red mud tablet by twin rollers extruding, thickness≤3 millimeter of red mud tablet; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 1 ~ 3 hour, and sintering temperature controls 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: concentration is the concentrated sulfuric acid 1 ~ 25% and the water 75 ~ 99% of 98%, concentration be 98% concentrated sulfuric acid percentage be weight percentage.
The production method of the red mud after acidifying takes first acidifying to carry out compounding ingredient again, sulfuric acid and quick dissolved sodium silicate, polyvinyl alcohol, hydroxypropyl methylcellulose and sodium carbonate generation chemical reaction can be avoided, give full play to raw-material respective characteristic in batching, and obtain complementation, guarantee the red mud inherent quality after acidifying.
According to the needs of product quality, adopt the red mud pH value after sodium carbonate adjustment acidifying, method is simple.
After the acidified process of red mud, red mud pH value controls 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 turning waste into wealth.
Red mud after acidifying has the high feature of good thixotropy, heat endurance, plasticity, caking property and dry compression.
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 red mud batching after acidifying is made up of following component by weight percentage: the red mud semi-finished product 96% after acidifying, quick dissolved sodium silicate 2%, polyvinyl alcohol 1.5%, hydroxypropyl methylcellulose 0.5% and sodium carbonate 0%.
The production method of the red mud 2, 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 operated, then dilute sulfuric acid is slowly added in red mud mixture carry out acidification; (2), by the red mud mixture after acidification, be red mud tablet by twin rollers extruding, thickness≤3 millimeter of red mud tablet; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 2 hours, and sintering temperature controls 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: concentration is the concentrated sulfuric acid 8% and the water 92% of 98%.
Claims (2)
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: the red mud semi-finished product 90 ~ 98% after acidifying, quick dissolved sodium silicate 0.1 ~ 5%, polyvinyl alcohol 0.1 ~ 5%, hydroxypropyl methylcellulose 0.01 ~ 3% and sodium carbonate 0 ~ 3%;
The half-finished production method of red mud after described acidifying: stir in the mixer (1) input of the batching of red mud mixture operated, then dilute sulfuric acid is slowly added in red mud mixture carry out acidification; (2), by the red mud mixture after acidification, be red mud tablet by twin rollers extruding, thickness≤3 millimeter of red mud tablet; (3) red mud tablet is transported to roasting in swinging drying oven, roasting time is 1 ~ 3 hour, and sintering temperature controls 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;
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%; 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%; The batching of dilute sulfuric acid is made up of following component by weight percentage: concentration is the concentrated sulfuric acid 1 ~ 25% and the water 75 ~ 99% of 98%.
2. the production method of the red mud according to claim 1 after acidifying, is characterized in that, 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.
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 |
|---|---|---|---|
| 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 CN104028538A (en) | 2014-09-10 |
| CN104028538B true 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108359435A (en) | 2018-02-06 | 2018-08-03 | 西南石油大学 | A kind of anchorage liquid prepared using red mud, slag and rejected well drilling liquid |
Citations (4)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2836315A4 (en) * | 2012-04-10 | 2015-12-23 | Charles Skoda | Stabilized red mud and methods of making the same |
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2014
- 2014-06-01 CN CN201410237838.2A patent/CN104028538B/en active Active
Patent Citations (4)
| 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 |
| 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 |
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| CN104028538A (en) | 2014-09-10 |
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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 |
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Granted publication date: 20160406 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG LONGYING PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Registration number: Y2023110000157 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Acidified red mud Granted publication date: 20160406 Pledgee: Huzhou Wuxing Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG LONGYING PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Registration number: Y2024980013322 |
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