CN102500592A - Method for comprehensively utilizing alumina red mud - Google Patents
Method for comprehensively utilizing alumina red mud Download PDFInfo
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- CN102500592A CN102500592A CN2011102752678A CN201110275267A CN102500592A CN 102500592 A CN102500592 A CN 102500592A CN 2011102752678 A CN2011102752678 A CN 2011102752678A CN 201110275267 A CN201110275267 A CN 201110275267A CN 102500592 A CN102500592 A CN 102500592A
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Abstract
The invention relates to a method for processing the content of alkali in alumina red mud. The method comprises the following steps of: 1, pulping the alumina red mud, and feeding slurry into a dealkalization reaction tank; 2, dealkalizing: adding a dealkalizing agent into the red mud slurry, uniformly stirring, rapidly reacting the dealkalizing agent in the reaction tank, and carrying out solid-liquid separation after reacting; 3, roasting and reducing: reducing the dealkalized red mud by adopting an iron oxide roasting and reducing process; and 4, magnetically separating: feeding the red mud into a magnetic separator by using a mortar pump so that the red mud is separated into magnetic red mud and non-magnetic red mud, feeding the magnetic red mud into a ball mill to be ball-milled, after filter-pressing and drying the non-magnetic red mud, taking the non-magnetic red mud separated through magnetic separation for two times as medium and fine sands for dry mortar, for later use, and exciting and activating components of SiO2 and AL2O3 in the red mud by adding alkaline materials, such as carbide slag or limestone powder and the like. The method disclosed by the invention has the characteristics of simple process and low investment, so that the alkali content in the red mud is greatly reduced.
Description
Technical field
The invention belongs to industrial residue and utilize the field again, be specifically related to a kind of alumina laterite comprehensive utilization method.
Background technology
The contaminative waste residue of getting rid of when red mud is aluminium industry extraction aluminium oxide.1 ton of aluminium oxide of the every production of average, the subsidiary red mud of producing 1.0～2.0 tons.China is alumina producing big country, produces more than 2,300 ten thousand tons in aluminium oxide, and accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation in 2009.The less than 4.0% of China's red mud comprehensive utilization at present, nearly 200,000,000 tons of accumulative total volume of cargo in storages.Along with the growth of China's aluminium oxide output and the reduction gradually of bauxite product, the annual production of red mud also will constantly increase, and expect 2015; Red mud accumulative total is stored up reaching 3.5 hundred million tons; Storing up in a large number of red mud, both land occupation, waste resource were prone to cause environmental pollution and potential safety hazard again.Given this; How tame research institution is all in the research and development of carrying out energetically the red mud comprehensive utilization both at home and abroad; And also obtained some achievements, but none achievement can realize large-scale commercial application veritably so far, more not have which achievement that the utilization of red mud is surpassed 30%.One of them main cause is exactly that the alkalinity of red mud is too high.With the Bayer process red mud is example, Na wherein
2O content (mass fraction) belongs to high-risk pollutant up to 9～11%.So high alkali number is the bottleneck of red mud development and use.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art, the invention provides a kind of processing alumina laterite comprehensive utilization method, may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 25～35% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent is wherein reacted rapidly in mixed the containing in retort; When the pH value of slurry is 7～8, the dealkalize slurry is delivered to vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd; Roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processing, and sintering temperature is 750～800 ℃; Add 10% basic matterial in the roasting process so that replenish the calcium and excite the activity of other compositions, the recovery time is 15～20min;
Described basic matterial comprises: carbide slag or lime stone.
The 4th; Magnetic separation separates, and red mud directly gets into after through the roasting reduction of 15～20min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
The invention has the beneficial effects as follows:
What the present invention adopted is to utilize the dealkalize agent to carry out dealkalize to handle, and utilizes ripe roasting reduction iron oxide PROCESS FOR TREATMENT then, add basic matterials such as carbide slag or agstone excite with activation wherein SiO
2And AL
2O
3Composition has that technology is simple, small investment, makes the alkalinity of red mud reduce by 80～98% greatly.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further explain.
Embodiment one
A kind of processing alumina laterite comprehensive utilization method may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 25% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the red mud slurries of dealkalize; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent wherein be reaction rapidly in retort; When the pH value to 7 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 750 ℃, and the carbide slag of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 20min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 20min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
Add in the present embodiment carbide slag excite with activation wherein SiO
2And AL
2O
3Composition makes the alkalinity of red mud reduce by 80% greatly.
Embodiment two
A kind of processing alumina laterite comprehensive utilization method may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 35% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent wherein be reaction rapidly in retort; When the pH value to 8 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 800 ℃, and the lime stone of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 15min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 15min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
Adding agstone in the present embodiment excites and activation SiO wherein
2And AL
2O
3Composition makes the alkalinity of red mud reduce by 90% greatly.
Embodiment three
A kind of processing alumina laterite comprehensive utilization method may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 30% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent is wherein reacted rapidly in mixed the containing in retort; When the pH value to 7.5 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 780 ℃, and the carbide slag of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 18min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 18min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
Adding carbide slag in the present embodiment excites and activation SiO wherein
2And AL
2O
3Composition makes the alkalinity of red mud reduce by 97% greatly.
Claims (4)
1. an alumina laterite comprehensive utilization method is characterized in that, may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 25～35% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent wherein be reaction rapidly in retort; When the pH value to 7 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd; Roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processing, and sintering temperature is 750～800 ℃; Add 10% basic matterial in the roasting process so that replenish the calcium and excite the activity of other compositions, the recovery time is 15～20min;
Described basic matterial comprises: carbide slag or lime stone.
The 4th; Magnetic separation separates, and red mud directly gets into after through the roasting reduction of 15～20min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
2. a kind of processing alumina laterite comprehensive utilization method according to claim 1 is characterized in that, may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 25% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent wherein be reaction rapidly in retort; When the pH value to 7 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 750 ℃, and the carbide slag of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 20min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 20min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
3. a kind of processing alumina laterite comprehensive utilization method according to claim 1 is characterized in that, may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 35% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent is wherein reacted rapidly in mixed the containing in retort; When the pH value to 8 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 800 ℃, and the lime stone of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 15min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 15min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
4. a kind of processing alumina laterite comprehensive utilization method according to claim 1 is characterized in that, may further comprise the steps:
The first, to alumina laterite making beating, process solid content and be 30% the slurry of carrying, and slurry is sent in the de-alkali reaction jar;
The second, dealkalize is handled, and in the red mud slurry, adds the dealkalize agent; And stir the dealkalize agent: red mud slurries=8: 100, dealkalize agent is wherein reacted rapidly in mixed the containing in retort; When the pH value to 7.5 of slurry, the dealkalize slurry is delivered to the vacuum filter washing after, Separation of Solid and Liquid; Solid Conveying and Melting is to rotary kiln, and washing water by precipitation is returned the production line recycle after filtering;
The 3rd, roasting reduction, the red mud after dealkalize handled adopt roasting reduction iron oxide technology to reduce processings, and sintering temperature is 780 ℃, and the carbide slag of adding 10% in the roasting process is so that replenish the calcium and excite the activity of other compositions, and the recovery time is 18min;
The 4th; Magnetic separation separates, and red mud directly gets into behind the process roasting reduction of 18min in the cooling water, and the iron content red mud became grey black and had good magnetic this moment; Using mortar pump that it is sent into just can red mud be divided in the magnetic separator is magnetic and nonmagnetic two parts; The magnetic ball mill of sending into carries out fine grinding, and the TFe content of common selected magnetic iron powder can reach more than 60%, and the middle fine sand that the nonmagnetic portion that twice magnetic separation separated is used as dry mortar after press filtration and drying again is subsequent use.
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|---|---|---|---|
| CN2011102752678A CN102500592A (en) | 2011-09-16 | 2011-09-16 | Method for comprehensively utilizing alumina red mud |
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|---|---|---|---|
| CN2011102752678A CN102500592A (en) | 2011-09-16 | 2011-09-16 | Method for comprehensively utilizing alumina red mud |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131214A (en) * | 2013-02-05 | 2013-06-05 | 茌平县金德赤泥资源再利用有限公司 | Technological method of using alumina byproduct red mud for producing polyvinyl chloride (PVC) packing |
| CN104071954A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院过程工程研究所 | Method of treating high-iron red mud by alkaline process for deep dealkalization and iron enrichment |
| CN104860648A (en) * | 2015-05-05 | 2015-08-26 | 遵义行远陶瓷有限责任公司 | Treatment process for producing ceramic through Bayer process red mud and treatment pond |
| CN104988304A (en) * | 2015-08-04 | 2015-10-21 | 江苏省冶金设计院有限公司 | Comprehensive processing method of red mud and acetylene sludge |
| CN105174295A (en) * | 2015-10-15 | 2015-12-23 | 北京荣富鑫环保科技有限公司 | Dry-process electric-separation governing system for red mud |
| CN105331799A (en) * | 2015-10-20 | 2016-02-17 | 山东建筑大学 | Integrated calcination method for dealkalization and magnetization of Bayer process red mud |
| CN109943706A (en) * | 2019-03-22 | 2019-06-28 | 昆明理工大学 | A method of recycling iron in low iron Bayer process red mud |
| CN113409979A (en) * | 2021-06-15 | 2021-09-17 | 中骥新材料有限公司 | Red mud radioactive shielding agent and method for shielding red mud radioactivity |
| CN114538490A (en) * | 2022-01-30 | 2022-05-27 | 中国铝业股份有限公司 | Method for reducing red mud slurry moisture in sintering method raw material and red mud raw slurry |
| CN115521083A (en) * | 2022-10-12 | 2022-12-27 | 四川安达尔环保工程有限公司 | Method for applying red mud to cement production with zero carbon emission |
| CN115634915A (en) * | 2022-08-29 | 2023-01-24 | 昆明理工大学 | Method for dealkalizing red mud and recovering sodium alkali and iron resources |
| CN115818999A (en) * | 2022-10-12 | 2023-03-21 | 四川安达尔环保工程有限公司 | Method for producing sandstone aggregate from red mud |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186430A (en) * | 1982-04-23 | 1983-10-31 | Mitsui Alum Kogyo Kk | Granulating method of red mud |
| JPS6086021A (en) * | 1983-10-17 | 1985-05-15 | Mitsui Alum Kogyo Kk | Granulation of red mud cake |
| CN1743475A (en) * | 2005-09-23 | 2006-03-08 | 贵阳铝镁设计研究院 | Method for extracting aluminium and iron from high-iron bauxite trihydrate |
| CN101412616A (en) * | 2007-10-16 | 2009-04-22 | 贵州平坝宏大铝化工有限公司 | Method for processing red mud from Bayer process by block-making and lime sintering method |
| CN101423318A (en) * | 2008-11-24 | 2009-05-06 | 中国长城铝业公司 | Red mud dealkalization method |
| CN101468866A (en) * | 2007-12-27 | 2009-07-01 | 中国科学院生态环境研究中心 | Normal atmosphere dealkalizing method by sintering |
| CN101624654A (en) * | 2009-04-17 | 2010-01-13 | 华中科技大学 | Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud |
| CN101831520A (en) * | 2010-06-10 | 2010-09-15 | 中国铝业股份有限公司 | Method for producing sponge iron co-production sodium aluminate solution by using Bayer process red mud |
| CN101927255A (en) * | 2009-09-03 | 2010-12-29 | 昆明理工大学 | Method for carbon dioxide suspension dealkalization of red mud for alumina plant |
-
2011
- 2011-09-16 CN CN2011102752678A patent/CN102500592A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186430A (en) * | 1982-04-23 | 1983-10-31 | Mitsui Alum Kogyo Kk | Granulating method of red mud |
| JPS6086021A (en) * | 1983-10-17 | 1985-05-15 | Mitsui Alum Kogyo Kk | Granulation of red mud cake |
| CN1743475A (en) * | 2005-09-23 | 2006-03-08 | 贵阳铝镁设计研究院 | Method for extracting aluminium and iron from high-iron bauxite trihydrate |
| CN101412616A (en) * | 2007-10-16 | 2009-04-22 | 贵州平坝宏大铝化工有限公司 | Method for processing red mud from Bayer process by block-making and lime sintering method |
| CN101468866A (en) * | 2007-12-27 | 2009-07-01 | 中国科学院生态环境研究中心 | Normal atmosphere dealkalizing method by sintering |
| CN101423318A (en) * | 2008-11-24 | 2009-05-06 | 中国长城铝业公司 | Red mud dealkalization method |
| CN101624654A (en) * | 2009-04-17 | 2010-01-13 | 华中科技大学 | Method for recycling iron and aluminum by particle size grading pretreatment of Bayer process red mud |
| CN101927255A (en) * | 2009-09-03 | 2010-12-29 | 昆明理工大学 | Method for carbon dioxide suspension dealkalization of red mud for alumina plant |
| CN101831520A (en) * | 2010-06-10 | 2010-09-15 | 中国铝业股份有限公司 | Method for producing sponge iron co-production sodium aluminate solution by using Bayer process red mud |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131214B (en) * | 2013-02-05 | 2016-06-29 | 茌平县金德赤泥资源再利用有限公司 | Aluminium oxide by-product red mud is utilized to produce the process of PVC filler |
| CN103131214A (en) * | 2013-02-05 | 2013-06-05 | 茌平县金德赤泥资源再利用有限公司 | Technological method of using alumina byproduct red mud for producing polyvinyl chloride (PVC) packing |
| CN104071954A (en) * | 2013-03-29 | 2014-10-01 | 中国科学院过程工程研究所 | Method of treating high-iron red mud by alkaline process for deep dealkalization and iron enrichment |
| CN104071954B (en) * | 2013-03-29 | 2016-10-05 | 中国科学院过程工程研究所 | A kind of alkaline process processes the method for iron red mud degree of depth dealkalize and ferrum enrichment |
| CN104860648A (en) * | 2015-05-05 | 2015-08-26 | 遵义行远陶瓷有限责任公司 | Treatment process for producing ceramic through Bayer process red mud and treatment pond |
| CN104988304A (en) * | 2015-08-04 | 2015-10-21 | 江苏省冶金设计院有限公司 | Comprehensive processing method of red mud and acetylene sludge |
| CN105174295A (en) * | 2015-10-15 | 2015-12-23 | 北京荣富鑫环保科技有限公司 | Dry-process electric-separation governing system for red mud |
| CN105331799A (en) * | 2015-10-20 | 2016-02-17 | 山东建筑大学 | Integrated calcination method for dealkalization and magnetization of Bayer process red mud |
| CN109943706A (en) * | 2019-03-22 | 2019-06-28 | 昆明理工大学 | A method of recycling iron in low iron Bayer process red mud |
| CN113409979A (en) * | 2021-06-15 | 2021-09-17 | 中骥新材料有限公司 | Red mud radioactive shielding agent and method for shielding red mud radioactivity |
| CN114538490A (en) * | 2022-01-30 | 2022-05-27 | 中国铝业股份有限公司 | Method for reducing red mud slurry moisture in sintering method raw material and red mud raw slurry |
| CN115634915A (en) * | 2022-08-29 | 2023-01-24 | 昆明理工大学 | Method for dealkalizing red mud and recovering sodium alkali and iron resources |
| CN115521083A (en) * | 2022-10-12 | 2022-12-27 | 四川安达尔环保工程有限公司 | Method for applying red mud to cement production with zero carbon emission |
| CN115818999A (en) * | 2022-10-12 | 2023-03-21 | 四川安达尔环保工程有限公司 | Method for producing sandstone aggregate from red mud |
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Application publication date: 20120620 |