CN101254481A - Aluminum oxide red mud iron selection technique - Google Patents
Aluminum oxide red mud iron selection technique Download PDFInfo
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- CN101254481A CN101254481A CNA2008100155115A CN200810015511A CN101254481A CN 101254481 A CN101254481 A CN 101254481A CN A2008100155115 A CNA2008100155115 A CN A2008100155115A CN 200810015511 A CN200810015511 A CN 200810015511A CN 101254481 A CN101254481 A CN 101254481A
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- red mud
- aluminum oxide
- iron
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Abstract
The invention relates to a process for recovering iron from red mud by using aluminum oxide, which belongs to the field of red mud treatment. The method includes the following steps: pre-mixing red mud slurry with water; sorting the concentrate slurry, the rock slurry and the tailing slurry by using a spiral launder; treating the concentrate slurry with a shaking table to separate the iron slurry; and grinding the rock slurry to a ball mill and then mixing with the concentrate slurry in the shaking table for further separation. The process can recover 6-8% of iron trioxide and ferroferric oxide powders in the red mud, which solves the storage problem of useless red mud to improve environment and realizes the cyclic utilization of waste resources as well as the resource conservation. The process can further bake the ceramic granule and extrude the burning-free bricks by using the distillation, which achieves the reutilization of the waste and reduces the waste discharge.
Description
Technical field
The invention belongs to the alumina laterite treatment process.
Background technology
Red mud is the industrial residue of discharging in the aluminum oxide production process, is general solid waste, produces 1 ton of aluminium oxide and can produce 1.25-1.5 ton red mud.The red mud pH value of aluminium oxide is middle strong basicity, can cause bigger harm to environment.A large amount of in the world red muds is that the method that adopts ocean disposal and land to store up is disposed at present, China mostly adopts methods such as level land Gao Tai, lowland filling to the processing of red mud, this has not only taken a large amount of soils, and causes great pollution and influence to stacking the ground surrounding environment.Because of stacking red mud, can cause certain pollution to underground water, surrounding resident domestic water and crops are subjected to certain influence, and the stacking of red mud simultaneously can spend a large amount of transportation expenses, stockyard construction and maintenance cost, so alumina laterite has a strong impact on and restricting ecological environment.Along with improving constantly and passage of time of aluminium oxide production capacity, the red mud piling up amount is increasing, is seriously restricting economic development, can cause great harmful effect to economic environment simultaneously.Red mud is handled problems and has been caused social extensive concern.
Contain materials such as iron, silicon, phosphorus, calcium in the alumina laterite, wherein the content of iron discharges with red mud up to 19.77% iron, contaminated environment not only, and cause the huge waste of resource.
Summary of the invention
The object of the present invention is to provide a kind of aluminum oxide red mud iron selection technique, the di-iron trioxide of 12-15% and tri-iron tetroxide iron powder slurry in the recyclable red mud.
The present invention is achieved in that
Aluminum oxide red mud iron selection technique is characterized in that comprising following processing step: red mud slurries adds the water premix, dilutes and lowers the temperature, and enters spiral sluice again and carries out sorting, sub-elects concentrate slurry, chats slurry and mine tailing slurry; The concentrate slurry enters shaking table, adds moisture stream, and the shaking table sidepiece distributes the mineral slurry, and end parts flows out the iron powder slurry, and the iron powder slurry enters the product groove; After described chats slurry is inserted ball mill and carried out ball mill crushing, enter described shaking table and shunt with the concentrate slurry.
Red mud slurries enters before the spiral sluice carries out magnetic separation by magnetic separator earlier, and the red mud clout of selecting behind the iron powder slurry enters spiral sluice again.
After the present invention adopts such scheme, adopt gravity treatment to add magnetic separation process, the di-iron trioxide of 6--8% and tri-iron tetroxide iron powder slurry in the recyclable red mud, can be directly used in steel mill's steel-refining raw material, not only solved the idle stacking problem of red mud, improve surrounding enviroment, and realized the recycling of waste resource, save material.
The present invention also can utilize the mud roasting haydite of extraction and push non-burning brickly, reaches twice laid, reduces the waste discharge amount.
Description of drawings
Accompanying drawing is a process chart of the present invention.
The specific embodiment
The present invention mainly adopts gravity treatment to add magnetic separation process red mud is handled, and therefrom selects iron body ray machine to handle.At first red mud slurries enters the premix groove, and the water that adds weight ratio in the premix groove and be 25%-30% dilutes, lowers the temperature, instantaneous reduction slurry temperature.The red mud slurries that mixes in the premix groove enters magnetic separator, selects iron to handle, can magneticly elect 2%-3% in the red mud slurries with Fe
2O
3, Fe
2O
4Be main iron.Squeeze into spiral sluice through the later red mud clout of magnetic separation by pipeline, in spiral sluice, add water simultaneously by weight 5%, carry out sorting, cooling, sub-elect concentrate slurry, chats slurry and mine tailing slurry (outer is that mine tailing slurry, centre are the concentrate slurry for chats slurry, internal layer).(1) processing of concentrate slurry.The Main Ingredients and Appearance of concentrate slurry is the slurry of trioxygen-containingization two iron and tri-iron tetroxide, directly enter shaking table, the cradle vibrate frequency is 30 times/minute, add moisture by weight 10% and flow, the flushing mineral, the shaking table sidepiece distributes the mineral slurry after washing away, end parts flows out the iron powder slurry, the iron powder slurry enters the product groove, and the iron powder slurry can be directly used in steel mill's steel-refining raw material, and the mineral slurry is sent in the mine tailing slurry after collecting.(2) processing of chats slurry.The chats slurry is the mixture of small amounts of iron and silicon, and Main Ingredients and Appearance is di-iron trioxide and ferriferrous oxide particles and siliceous, aluminium matter homobium, need carry out break process.Earlier the chats slurry is inserted ball mill and carry out ball mill crushing, iron sand is separated, enter the shaking table in the processing of concentrate slurry material after the separation, wash away shunting with the concentrate slurry.(3) processing of mine tailing slurry.Contain calcareous in the mineral slurry that distributes in mine tailing slurry and the concentrate slurry and material such as sulphur phosphorus.Mine tailing slurry and mineral slurry directly enter sedimentation basin, and post precipitation separates the material that shakes out, and stack control water, can be used as the sandstone material and are used to make cement; Clout is removed moisture content, impurity by deslimer, remaining mud is used for the roasting haydite and extruding is non-burning brick, remain impure water and carry back through post precipitation and select the iron production line, the water of failing back can be used for the water of premix groove, spiral sluice and shaking table etc., realizes water circulation use.
This technology is carried out the classification processing to red mud, and problem is shelved in the stacking that has not only solved red mud, has reduced red mud to appropriation of land, has also improved red mud piling up place ecological environment on every side simultaneously, has realized the comprehensive cyclic utilization of resource.
Below in conjunction with embodiment the present invention is elaborated.
As shown in drawings, choose 1 ton of red mud slurries, after measured, concentration 30%, iron content 20%, 1000kg * 30%=300kg (solid material).After adding water 50kg and diluting cooling, enter magnetic separator and carry out magnetic separation, can go out iron powder slurry 5-6kg, the red mud clout is squeezed into spiral sluice, adds water 50kg simultaneously in spiral sluice and carries out sorting, sub-elects the concentrate slurry, accounts for 50%, the chats slurry accounts for 20% and the mine tailing slurry, account for 30%.
1, after the chats slurry is inserted ball mill and carried out ball mill crushing, enters shaking table, enter shunting, add water 100kg and shunt, distribute iron powder slurry 40kg, mineral slurry 260__kg with the concentrate slurry.The mineral slurry adds in the mine tailing slurry.
After testing, it is di-iron trioxide and tri-iron tetroxide mixture that institute goes out the iron powder slurry, wherein contains: iron 54.72%; Silicon 4.92%; Phosphorus 0.043%; Calcium 4.26%; Sulphur 0.039%; Moisture about 15%.
2, mine tailing slurry and mineral slurry enter sedimentation basin, and post precipitation separates the material that shakes out, and stack control water, can get sandstone material 150kg; Clout is removed moisture content, impurity by deslimer, can get mud 100__kg.
Handle one ton of red mud, need 0.5 ton of water altogether, the di-iron trioxide and the tri-iron tetroxide iron powder slurry rate of recovery are about 6--8%.
Economic and Efficiency Analysis:
One, handles 1 ton of red mud slurries, concentration 30%, iron content 20%
1000kg * 30%=300kg (solid material)
Iron 300kg, 300kg * 10%=30kg * 0.56 yuan/kg=16.8 unit
Sand 300kg, 300kg * 50%=150kg * 0.017 yuan/kg=2.55 unit
Mud 300kg, 300kg * 30%=90kg * 0.01 yuan/kg=0.9 unit
Add up to: 20.25 yuan of 270kg
Two, handle 1 ton of red mud slurries:
Need electric 11kwh * 0.8 yuan/kwh=8.8 unit
Need water (adding water) 0.5t * 0.12 yuan/t=0.06 unit
2 yuan of labor wage
0.5 yuan of maintenance cost
Add up to 11.36 yuan/t
Three, profits tax=20.25-11.36=8.89 unit/ton
Four, water:
1 ton of moisture 1000kg * 70%=700kg of red mud slurries
Handle 1 ton of red mud slurries and add water 500kg
Add up to: 1200kg
Through post precipitation, but recycle-water 500kg.
Claims (7)
1, aluminum oxide red mud iron selection technique is characterized in that comprising following processing step: red mud slurries adds the water premix, dilutes and lowers the temperature, and enters spiral sluice again and carries out sorting, sub-elects concentrate slurry, chats slurry and mine tailing slurry; The concentrate slurry enters shaking table, adds moisture stream, and the shaking table sidepiece distributes the mineral slurry, and end parts flows out the iron powder slurry, and the iron powder slurry enters the product groove; After described chats slurry is inserted ball mill and carried out ball mill crushing, enter described shaking table and shunt with the concentrate slurry.
2, aluminum oxide red mud iron selection technique according to claim 1 is characterized in that: red mud slurries enters before the spiral sluice carries out magnetic separation by magnetic separator earlier, and the red mud clout of selecting behind the iron powder slurry enters spiral sluice again.
3, aluminum oxide red mud iron selection technique according to claim 1 and 2 is characterized in that: the adding weight ratio was 5% water when red mud slurries entered spiral sluice.
4, aluminum oxide red mud iron selection technique according to claim 3 is characterized in that: the vibration frequency of described shaking table is 30 times/minute, and adds moisture stream by 5% weight ratio, the flushing mineral.
5, aluminum oxide red mud iron selection technique according to claim 4 is characterized in that: the mineral slurry that mine tailing slurry and shaking table distribute separates the material that shakes out through post precipitation, and clout separates mud extraction and water impurity by deslimer.
6, aluminum oxide red mud iron selection technique according to claim 5 is characterized in that: the isolated mud of deslimer is used for the roasting haydite and extruding is non-burning brick.
7, aluminum oxide red mud iron selection technique according to claim 6 is characterized in that: described water impurity is recycling through post precipitation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100155115A CN101254481A (en) | 2008-04-10 | 2008-04-10 | Aluminum oxide red mud iron selection technique |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100155115A CN101254481A (en) | 2008-04-10 | 2008-04-10 | Aluminum oxide red mud iron selection technique |
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| CN101254481A true CN101254481A (en) | 2008-09-03 |
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| CNA2008100155115A Pending CN101254481A (en) | 2008-04-10 | 2008-04-10 | Aluminum oxide red mud iron selection technique |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797768A (en) * | 2010-04-15 | 2010-08-11 | 江苏瑞诚非金属材料有限公司 | System for refining acid-resistant, high-temperature resistant and high-pressure resistant vitrified brick raw material |
| CN103008094A (en) * | 2012-11-28 | 2013-04-03 | 焦作市邦达工贸有限公司 | Comprehensive recycle technology of red mud |
| CN104353657A (en) * | 2014-11-03 | 2015-02-18 | 信发科技开发有限公司 | Technology and system for iron dressing, sand dressing and pelleting from red mud |
| CN106116390A (en) * | 2016-06-23 | 2016-11-16 | 长安大学 | A kind of unburned cement-free environmental protection brick and production method thereof |
-
2008
- 2008-04-10 CN CNA2008100155115A patent/CN101254481A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797768A (en) * | 2010-04-15 | 2010-08-11 | 江苏瑞诚非金属材料有限公司 | System for refining acid-resistant, high-temperature resistant and high-pressure resistant vitrified brick raw material |
| CN103008094A (en) * | 2012-11-28 | 2013-04-03 | 焦作市邦达工贸有限公司 | Comprehensive recycle technology of red mud |
| CN104353657A (en) * | 2014-11-03 | 2015-02-18 | 信发科技开发有限公司 | Technology and system for iron dressing, sand dressing and pelleting from red mud |
| CN106116390A (en) * | 2016-06-23 | 2016-11-16 | 长安大学 | A kind of unburned cement-free environmental protection brick and production method thereof |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080903 |