CN103290206A - Efficient composite additive for separating iron and aluminium from red mud and application - Google Patents
Efficient composite additive for separating iron and aluminium from red mud and application Download PDFInfo
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- CN103290206A CN103290206A CN2013102363221A CN201310236322A CN103290206A CN 103290206 A CN103290206 A CN 103290206A CN 2013102363221 A CN2013102363221 A CN 2013102363221A CN 201310236322 A CN201310236322 A CN 201310236322A CN 103290206 A CN103290206 A CN 103290206A
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Abstract
The invention relates to an efficient composite additive for separating iron and aluminium from red mud. The efficient composite additive comprises the following components: limestone, boarx, sodium carbonate and sodium humate. A preparation method of the efficient composite additive comprises steps of: weighing and uniformly mixing the limestone, the boarx, the sodium carbonate and the sodium humate according to a mass ratio, and then adopting a ball mill to dry mill until the mass of the powder with the granularity not more than 0.74mm accounts for 60% of the total mass of all the components. The application is characterized in that the composite additive is added in a red mud direct reduction-magnetic separation-alkali dissolution technology and accounts for 8-20% of the mass of the red mud, so that the grade of the obtained iron ore concentrate reaches 88-93%, the recovery rate of iron reaches 85-96%, and the dissolution rate of aluminium in magnetic separation tailings reaches 70-80%. The composite additive can be used for strengthening the direct reduction-magnetic separation-alkali (acid) dissolution technology and can be used for further producing direct reduction iron powder for steelmaking, so that a steel production process is effectively shortened; and excellent direct reduction iron powder is produced, moreover, the dissolution performance of aluminium oxide in the magnetic separation tailings is good, and the aluminium oxide can be prepared after the alkali dissolution of the magnetic separation tailings, so that the efficient separation and recycling of the iron an aluminium in the red mud can be realized.
Description
Technical field
The invention discloses composite additive and the application of iron and aluminium in a kind of high efficiency separation red mud; Specifically refer to red mud iron and the composite additive of aluminium and application in described technology in the high efficiency separation red mud in directly reduction-magnetic separation-alkali dissolving-out process; Belong to metallurgical, industrial residue application technology as the second resource field.
Background technology
Red mud is to be the fines strong basicity solid waste that produces in the raw material production alumina process with bauxite, and one ton of aluminum oxide of every production approximately produces 0.8-1.5 tons of red muds.The main ingredient of red mud comprises following: aluminum oxide, ferric oxide, calcium oxide, silicon-dioxide etc.; China is alumina producing big country, produces 2,378 ten thousand tons in aluminum oxide in 2009, accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation, and the accumulation volume of cargo in storage reaches 200,000,000 tons.At present China's red mud comprehensive utilization ratio only is 4%, on average utilizes level far below national industrial solid wastes 65%.Along with the growth year by year of China's aluminum oxide output and the reduction gradually of bauxite grade, the year generation of 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, not only take a large amount of soils, the alkaline matter in the red mud is also with contaminate environment.Carrying out red mud comprehensive utilization has become alumina industry and has developed a circular economy, and builds " resource-conserving " and " environmentally friendly " social inevitable requirement.
The iron that adopts direct reduction-magnetic separation to reclaim in the red mud has been carried out big quantity research both at home and abroad, developed sodium sulfate, yellow soda ash, Sodium Tetraborate, single reinforced by additive red mud such as Calcium Fluoride (Fluorspan) directly reduce-the magnetic separation separation.Above-mentioned additive all can improve concentrate iron grade and iron recovery, but all additive amount are too high, and sodium sulfate and Calcium Fluoride (Fluorspan) can cause in the iron ore concentrate sulphur and fluorine content higher, and flue gas sulphur oxide and content of fluoride exceed standard, contaminate environment causes the quantitative change of direct-reduced iron opaque poor simultaneously.
Goal of the invention
First purpose of the present invention be to overcome the deficiency of prior art and provide a kind of reasonable mixture ratio of components, production technique simple, easy to use, directly reduce at red mud-magnetic separation-the alkali dissolving-out process in, effectively promote iron grain growth in the red mud, make the aluminium mineral in the red mud be converted into sodium aluminate or calcium aluminate, realize the composite additive of iron and aluminium in the high efficiency separation red mud of the high efficiency separation of iron and aluminium in the red mud and recovery.
Another object of the present invention is to provide that the composite additive of iron and aluminium directly reduces at red mud in a kind of high efficiency separation red mud-application in magnetic separation-alkali dissolving-out process.
The composite additive of iron and aluminium in a kind of high efficiency separation red mud of the present invention, formed by mass percentage by following component:
Wingdale 30-50%,
Borax 10-15%,
Yellow soda ash 30-50%,
Sodium humate 5-10%.
The composite additive of iron and aluminium in a kind of high efficiency separation red mud of the present invention, formed by mass percentage by following component:
Wingdale 35-45%,
Borax 12-14%,
Yellow soda ash 35-45%,
Sodium humate 7-9%.
The composite additive of iron and aluminium in a kind of high efficiency separation red mud of the present invention, formed by mass percentage by following component:
Wingdale 38-42%,
Borax 12-14%,
Yellow soda ash 38-42%,
Sodium humate 7-9%.
The preparation process of the composite additive of iron and aluminium is in a kind of high efficiency separation red mud of the present invention: yellow soda ash, borax, Wingdale and sodium humate are carried out weighing, mixing by above-mentioned quality proportioning, adopt the fine grinding of ball mill dry type to account for 60% of each component total mass to the quality of granularity≤0.074mm then, namely obtain composite additive.
The application of the composite additive of iron and aluminium in a kind of high efficiency separation red mud, be directly reduce at red mud-magnetic separation-alkali dissolving-out process in, press the 8-20% of red mud quality, add described composite additive.
The application of the composite additive of iron and aluminium in a kind of high efficiency separation red mud, red mud directly reduces-and the processing parameter of magnetic separation-alkali dissolving-out process is: reduction temperature 1000-1200 ℃, under the condition of recovery time 60-180min, go back raw coal by C/Fe than the 0.4-1.0 interpolation.
The application of the composite additive of iron and aluminium in a kind of high efficiency separation red mud, directly reduce at red mud-magnetic separation-the alkali dissolving-out process in, iron concentrate grade reaches 88-93%, iron recovery reaches 85-96%, the solubility rate of aluminium reaches 70-80% in the magnetic tailing.
Advantage of the present invention and positively effect
Composite additive of the present invention is owing to adopt the said components proportioning to utilize low melting point characteristic, yellow soda ash and the Wingdale of borax directly forming sodium aluminate or calcium aluminate, Calucium Silicate powder etc. with aluminium mineral and silicon mine reaction in the reduction process, improve the ferro-aluminum separating effect, improve product iron grade and the rate of recovery, make simultaneously that aluminium obtains enrichment in the magnetic tailing, and be easy to the characteristics of stripping.This additive when sodium aluminate, calcium aluminate and Calucium Silicate powder form, significantly suppresses the generation of fayalite and sodium aluminium silicate promoting ferriferous oxide reduction, metallic iron grain growth, is conducive to ferro-aluminum and separates.
The mechanism of the present invention's invention is sketched in following:
Utilize borax directly easily producing low melting point in the reduction process, promote that effectively iron mineral is reduced into metallic iron in the red mud, promote the metallic iron grain growth simultaneously; Utilize yellow soda ash in reduction process with red mud in aluminium mineral reaction, generate the sodium aluminate that is soluble in alkaline solution; Utilize Wingdale in reduction process, to become calcium oxide, the reduction of catalysis ferriferous oxide on the one hand, react with silicate minerals on the other hand, reduce the formation of fayalite and sodium aluminium silicate, further promote the formation of iron grain growth and sodium aluminate, calcium aluminate, be conducive to the stripping of aluminium in the subsequent handling; Utilize the viscosifying power of organic binder bond sodium humate strong, effectively improve intensity and the thermostability of red mud pelletizing green-ball; The present invention's multi-functional composite additive is had strengthen the red mud balling-up, pelletizing directly reduces, promotes the three efficacy that metallic iron grain growing and sodium aluminate, calcium aluminate and Calucium Silicate powder form.
Adopt directly reduction-magnetic separation-alkali dissolving-out process to handle the red mud of iron grade 30-50%, under the situation of not adding any additives, the acquisition iron concentrate grade is 65-78%, and iron recovery is 67-76% only, and the solubility rate of aluminium only is 30-40% in the magnetic tailing; Add composite additive of the present invention as the 8-20% by the red mud quality, obtain iron concentrate grade up to 88-93%, iron recovery reaches the good index of 85-96%, and the solubility rate of aluminium is for reaching 70-80% in the magnetic tailing.Iron concentrate grade improves 15-23 percentage point, and iron recovery improves 18-20 percentage point, and the aluminium solubility rate improves 40-50 percentage point.
In sum, composite additive of the present invention can be strengthened direct reduction-magnetic separation-alkali (acid) dissolving-out process, can produce the direct-reduced iron powder for steel-making a step, effectively shortens Steel Production Flow Chart; When producing high-quality direct-reduced iron powder, the aluminium sesquioxide dissolving out capability is good in the magnetic separation tailings, through after the alkali stripping, can prepare aluminium sesquioxide, thereby realizes high efficiency separation and the recycling of iron and aluminium in the red mud.
Embodiment:
Comparative Examples 1
Red mud iron grade is 50.6%, Al
2O
3Content 8.45%, do not add any additives, adopt coal-based direct reduction-magnetic separation-dissolving-out process, 1100 ℃ of reduction temperatures, under the condition of recovery time 120min, press C/Fe and add the coal reduction than 0.7, also original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the direct-reduced iron powder of acquisition iron grade 77.52%, iron recovery 75.43%, the solubility rate of aluminium sesquioxide only is 40.3% in the magnetic separation tailings.
Comparative Examples 2
Red mud iron grade is 30.8%, Al
2O
3Content 8.32%, do not add any additives, adopt coal-based direct reduction-magnetic separation-dissolving-out process, 1200 ℃ of reduction temperatures, under the condition of recovery time 120min, press C/Fe and add the coal reduction than 0.7, also original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the direct-reduced iron powder of acquisition iron grade 65.52%, iron recovery 69.11%.The solubility rate of aluminium sesquioxide only is 30.8% in the magnetic separation tailings.
Embodiment 1
Red mud iron grade is 50.6%, Al
2O
3Content 8.45%, (mass percent is Wingdale 50%, borax 10% to add composite additive by 13% of red mud quality, yellow soda ash 35%, sodium humate 5%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1200 ℃ of reduction temperatures, under the condition of recovery time 60min, press C/Fe and add the coal reduction than 0.7, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, obtain the direct-reduced iron powder of iron grade 90.87%, iron recovery 95.76%.The solubility rate of aluminium sesquioxide is 72.5% in the magnetic separation tailings.
Embodiment 2
Red mud iron grade is 36.61%, Al
2O
3Content 12.97% is pressed 13% direct composite additive (Wingdale 30%, borax 15% of red mud quality, yellow soda ash 50%, sodium humate 5%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1100 ℃ of reduction temperatures, under the condition of recovery time 100min, press C/Fe and add the coal reduction than 1.0, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the back obtains the direct-reduced iron powder of iron grade 91.32%, iron recovery 88.36%.The solubility rate of aluminium sesquioxide is 73.9% in the magnetic separation tailings.
Embodiment 3
Red mud iron grade is 40.50%, Al
2O
3Content 7.07% is pressed 13% of red mud quality and is added composite additive (Wingdale 40%, borax 12%, yellow soda ash 40%, sodium humate 8%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1200 ℃ of reduction temperatures, under the condition of recovery time 180min, press C/Fe and add the coal reduction than 0.4, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the back obtains the direct-reduced iron powder of iron grade 90.03%, iron recovery 86.64%.The solubility rate of aluminium sesquioxide is 70.8% in the magnetic separation tailings.
Embodiment 4
Red mud iron grade is 40.50%, Al
2O
3Content 7.07% is pressed 20% of red mud quality and is added composite additive (Wingdale 40%, borax 12%, yellow soda ash 40%, sodium humate 8%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1000 ℃ of reduction temperatures, under the condition of recovery time 120min, press C/Fe and add the coal reduction than 1.0, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the back obtains the direct-reduced iron powder of iron grade 91.15%, iron recovery 87.32%.The solubility rate of aluminium sesquioxide is 80.3% in the magnetic separation tailings.
Embodiment 5
Red mud iron grade is 30.80%, Al
2O
3Content 8.32% is pressed 13% of red mud quality and is added composite additive (Wingdale 40%, borax 12%, yellow soda ash 40%, sodium humate 8%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1100 ℃ of reduction temperatures, under the condition of recovery time 120min, press C/Fe and add the coal reduction than 0.7, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the back obtains the direct-reduced iron powder of iron grade 90.03%, iron recovery 86.64%.The solubility rate of aluminium sesquioxide is 70.5% in the magnetic separation tailings.
Embodiment 6
Red mud iron grade is 30.80%, Al
2O
3Content 8.32% is pressed 8% of red mud quality and is added composite additive (Wingdale 40%, borax 12%, yellow soda ash 40%, sodium humate 8%), adopt coal-based direct reduction-magnetic separation-alkali dissolving-out process, 1100 ℃ of reduction temperatures, under the condition of recovery time 120min, press C/Fe and add the coal reduction than 0.7, go back original product fragmentation, ore grinding-magnetic separation, the stripping of magnetic tailing alkali, the back obtains the direct-reduced iron powder of iron grade 88.10%, iron recovery 85.11%.The solubility rate of aluminium sesquioxide is 81.1% in the magnetic separation tailings.
The data that obtained by above-described embodiment are as can be known: adopt composite additive of the present invention be applied in red mud directly reduce-magnetic separation-alkali dissolving-out process in, obtain iron concentrate grade up to 88-93%, iron recovery reaches the good index of 85-96%, and the solubility rate of aluminium is for reaching 70-80% in the magnetic tailing.Compare with Comparative Examples 1,2 corresponding datas, composite additive of the present invention be applied in red mud directly reduce-magnetic separation-alkali dissolving-out process in, iron concentrate grade has improved 15-23 percentage point, and iron recovery has improved 18-20 percentage point, and the aluminium solubility rate has improved 40-50 percentage point.Realized separating and recycling of iron and aluminium in the red mud.
Claims (7)
1. the composite additive of iron and aluminium in the high efficiency separation red mud, formed by mass percentage by following component:
Wingdale 30-50%,
Borax 10-15%,
Yellow soda ash 30-50%,
Sodium humate 5-10%.
2. the composite additive of iron and aluminium in a kind of high efficiency separation red mud according to claim 1, formed by mass percentage by following component: Wingdale 35-45%,
Borax 12-14%,
Yellow soda ash 35-45%,
Sodium humate 7-9%.
3. the composite additive of iron and aluminium in a kind of high efficiency separation red mud according to claim 1, formed by mass percentage by following component:
Wingdale 38-42%,
Borax 12-14%,
Yellow soda ash 38-42%,
Sodium humate 7-9%.
4. according to the preparation technology of the composite additive of iron and aluminium in claim 1, the 2 or 3 described a kind of high efficiency separation red muds; It is characterized in that: yellow soda ash, borax, Wingdale and sodium humate are carried out weighing, mixing by above-mentioned quality proportioning, adopt the fine grinding of ball mill dry type to account for 60% of each component total mass to the quality of granularity≤0.074mm then, namely obtain composite additive.
5. the application of the composite additive of iron and aluminium in claim 1, the 2 or 3 described a kind of high efficiency separation red muds is characterized in that: be directly reduce at red mud-magnetic separation-alkali dissolving-out process in, press the 8-20% of red mud quality, add described composite additive.
6. the application of the composite additive of iron and aluminium in a kind of high efficiency separation red mud according to claim 5, it is characterized in that: red mud directly reduces-and the processing parameter of magnetic separation-alkali dissolving-out process is: reduction temperature 1000-1200 ℃, under the condition of recovery time 60-120min, go back raw coal by C/Fe than the 0.4-1.0 interpolation.
7. the application of the composite additive of iron and aluminium in a kind of high efficiency separation red mud according to claim 5, it is characterized in that: directly reduce at red mud-magnetic separation-the alkali dissolving-out process in, iron concentrate grade reaches 88-93%, iron recovery reaches 85-96%, and the solubility rate of aluminium reaches 70-80% in the magnetic tailing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028538A (en) * | 2014-06-01 | 2014-09-10 | 许盛英 | Acidified red mud |
| CN105002362A (en) * | 2015-08-04 | 2015-10-28 | 江苏省冶金设计院有限公司 | Comprehensive treatment method for red mud and boron mud |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN107287415A (en) * | 2017-06-20 | 2017-10-24 | 中南大学 | Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application |
| CN108950180A (en) * | 2018-06-25 | 2018-12-07 | 中南大学 | A kind of method that Bayer process red mud reduction roasting mentions iron |
| CN109439894A (en) * | 2018-10-31 | 2019-03-08 | 安徽工业大学 | A method of utilizing iron, aluminium in waste resource recycling red mud |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766128A (en) * | 2005-08-25 | 2006-05-03 | 贵阳铝镁设计研究院 | Iron and alumnium extraction method from high iron bauxite |
| CN101413054A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Technology for comprehensively utilizing high ferro aluminiferous material |
| RU2009122595A (en) * | 2009-06-11 | 2010-12-20 | Государственное образовательное учреждение высшего профессионального образования "Уральский государственный технический университе | METHOD FOR PROCESSING RED Sludge |
| CN102329911A (en) * | 2011-09-13 | 2012-01-25 | 唐山奥特斯科技有限公司 | Process for manufacturing iron pellets from low-grade complex refractory ore through molten slag method |
-
2013
- 2013-06-14 CN CN201310236322.1A patent/CN103290206B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766128A (en) * | 2005-08-25 | 2006-05-03 | 贵阳铝镁设计研究院 | Iron and alumnium extraction method from high iron bauxite |
| CN101413054A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Technology for comprehensively utilizing high ferro aluminiferous material |
| RU2009122595A (en) * | 2009-06-11 | 2010-12-20 | Государственное образовательное учреждение высшего профессионального образования "Уральский государственный технический университе | METHOD FOR PROCESSING RED Sludge |
| CN102329911A (en) * | 2011-09-13 | 2012-01-25 | 唐山奥特斯科技有限公司 | Process for manufacturing iron pellets from low-grade complex refractory ore through molten slag method |
Non-Patent Citations (1)
| Title |
|---|
| 刘牡丹: "基于还原法的高铝铁矿石铝铁分离基础及新工艺研究", 《中国博士学位论文全文数据库工程科技Ⅰ辑》, 15 November 2010 (2010-11-15) * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028538A (en) * | 2014-06-01 | 2014-09-10 | 许盛英 | Acidified red mud |
| CN104028538B (en) * | 2014-06-01 | 2016-04-06 | 许盛英 | Red mud after acidifying |
| CN105002362A (en) * | 2015-08-04 | 2015-10-28 | 江苏省冶金设计院有限公司 | Comprehensive treatment method for red mud and boron mud |
| CN105002362B (en) * | 2015-08-04 | 2017-05-10 | 江苏省冶金设计院有限公司 | Comprehensive treatment method for red mud and boron mud |
| CN107227401A (en) * | 2017-06-20 | 2017-10-03 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN107287415A (en) * | 2017-06-20 | 2017-10-24 | 中南大学 | Strengthen compound additive of lateritic nickel ore briquetting and its preparation method and application |
| CN107227401B (en) * | 2017-06-20 | 2019-01-29 | 中南大学 | The method that copper ashes and lateritic nickel ore coreduction prepare cupric, ferronickel powder |
| CN108950180A (en) * | 2018-06-25 | 2018-12-07 | 中南大学 | A kind of method that Bayer process red mud reduction roasting mentions iron |
| CN109439894A (en) * | 2018-10-31 | 2019-03-08 | 安徽工业大学 | A method of utilizing iron, aluminium in waste resource recycling red mud |
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