CN110385196A - A kind of low-grade bauxite drop silicon impurity-removing method - Google Patents
A kind of low-grade bauxite drop silicon impurity-removing method Download PDFInfo
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- CN110385196A CN110385196A CN201810365919.9A CN201810365919A CN110385196A CN 110385196 A CN110385196 A CN 110385196A CN 201810365919 A CN201810365919 A CN 201810365919A CN 110385196 A CN110385196 A CN 110385196A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
A kind of low-grade bauxite drop silicon impurity-removing method, first by bauxite crushing raw ore and grind be sieved into ore pulp A, ore pulp A enters mechanical separation equipment A and is separated by solid-liquid separation to obtain solid A and liquid A, it is 25-35% ore pulp B that the solid A, which adds water to be made into solid content, ore pulp B, which enters, obtains foam product ore pulp C after technique is scanned in roughing and underflow object is scanned in roughing, wherein foam product ore pulp C obtains solid B and liquid B after mechanical separation equipment B separation of solid and liquid, it scans to obtain underflow ore pulp E and obtains solid C and liquid C by mechanical separation equipment C, the solid C is chats, chats is added in raw ore and regrinds, liquid C is ore pulp F, the solid D and liquid D that ore pulp F is obtained after mechanical dehydration, wherein solid D is true tailings, by using roughing and scan, it is mechanically decoupled be used in conjunction and The beneficiation method of chats is generated, successfully realizes that concentrate alumina silica ratio improves 4 points or more, concentrate yield is improved to 65% or more.
Description
Technical field
The invention belongs to technical field of beneficiation, silicon impurity-removing method drops in specially a kind of low-grade bauxite.
Background technique
Aluminium oxide is widely used in production, refractory material, ceramics, papermaking and the building materials field of metallic aluminium.Bauxite is raw
Unique raw material of aluminium oxide are produced, the method for the existing production aluminium oxide in China is using ore dressing --- Bayer process, Bayer process production
The prerequisite of aluminium oxide is exactly that the alumina silica ratio of bauxite has to be larger than 8 or more, and the bauxite mineral reserve high-grade naturally occurred
The ratio that ore accounts for gross reserves is very low, and especially 8 points of the domestic alumina silica ratio in China or more of ore ratio accounts for 30% left side of gross reserves
It is right.
In order to make full use of the exploitation with maximum benefit, domestic expert in the industry is devoted for years to scholar in low in decades
The research that silicon removal of impurities improves alumina silica ratio drops in grade aluminum ore.There is gratifying achievement finally to 2005, has successively put into effect sintering
Method, pickling leaching and positive and negative floatation etc., it is contemplated that social benefit, environmental protection and bayer process it is special
Property, reentry system generates after alumina producer all uses direct flotation method poor value is made to upgrade by ore dressing, but existing
Alumina silica ratio can only also be improved 2 to 3 points by technique, and not more than due to the yield of the limitation concentrate of direct floatation process
55%, such raw ore is lost big, and the output value is low, and economic benefit is low, cannot individually form industrialization, cannot promote so far applicable, causes
Vast resources waste.
Summary of the invention
It is lost greatly to solve raw ore, the low problem of the output value, the purpose of the present invention is to propose to a kind of low-grade bauxite drops
Silicon impurity-removing method by using roughing and is scanned, the mechanically decoupled beneficiation method being used in conjunction and generate chats, successfully realizes concentrate aluminium
Than improving 4 points or more, concentrate yield is improved to 65% or more silicon.
The technical solution that the present invention is taken to solve the above-mentioned problems are as follows:
Silicon impurity-removing method drops in a kind of low-grade bauxite, and the drop silicon impurity-removing method is first by bauxite crushing raw ore and grinds sieve
Divide and ore pulp A is made, ore pulp A enters mechanical separation equipment A and is separated by solid-liquid separation to obtain solid A and liquid A, and the solid A adds water
Being made into solid content is 25-35% ore pulp B, and ore pulp B, which enters after technique is scanned in roughing, obtains foam product ore pulp C and roughing underflow object,
Wherein foam product ore pulp C obtains solid B and liquid B after mechanical separation equipment B separation of solid and liquid, and the solid B is final essence
Mine, liquid B are ore pulp D, and the ore pulp D is scanned after mixing with roughing underflow object, scan to obtain underflow ore pulp E and by machine
It is chats that tool separation equipment C, which obtains solid C and liquid C, the solid C, and chats is added in raw ore and regrinds, and liquid C is
The solid D and liquid D that ore pulp F, ore pulp F are obtained after mechanical dehydration, wherein solid D is true tailings, and liquid D enters clear water
Pond is recycled；It is described sodium carbonate is added according to the ratio of raw ore 1-5kg/t when grinding to raw ore to be uniformly mixed, it adds
Water is configured to the ore pulp A that solid content is 20-25%；It is described to be added when preparing ore pulp B according to the ratio of raw ore 500-1200g/t
Synthetic fatty acid collecting agent simultaneously adjusts the pH value of ore pulp B to 8-11；The flow velocity of rougher process is 0.5-0.8m3/m2Min, when
Long 15-25min.
Further, described be crushed is the particle for being -2-3cm by crushing raw ore to granularity.
Further, the grinding is that the alumina green ore of broken mistake is entered mechanical equipment to grind and add water, carbonic acid
Sodium is sized to 70%-200 mesh, is modulated into ore pulp A, and the pH value of ore pulp A is 8-11.
Further, mechanical separation equipment A, mechanical separation equipment B, mechanical separation equipment C in the drop silicon impurity-removing method
It is sleeping spiral shell dehydration seperator.
Further, flocculant polystyrene amine is added in ore pulp F, wherein synthetic fatty acid collecting agent, sodium carbonate, poly- third second
Enamine is commercially available.
Further, particulate impurity, which is reduced, when the ore pulp B carries out mechanically decoupled can reduce collecting agent use when entering flotation
Amount improves roughing, scavenger concentrate index.
Further, when the ore pulp B roughing, the upper foam ore pulp C scanned carry out solid-liquid separation treatment ,+1000 mesh
Solid matter is final concentrate, product liquid ore pulp D.Into sweeping flotation, no longer secondary dosing.
Further, it is true tailings that flocculant, which is added, through mechanical dewatering equipment dewatered solids in the ore pulp F, and liquid converges
It is reusable to enter clear water reserviors.
Further, tailing water is reusable in the drop silicon impurity-removing method, tailing dry row.
Further, when ore pulp C carries out solid-liquid separation treatment ,+1000 mesh solid matters are final concentrate, -1000 mesh liquid
Body product is ore pulp D.Concentrate grading granularity is thinner compared with original technique, and concentrate alumina content index both can be improved,
The content's index of sulphur in concentrate, carbon, calcium can be reduced again.
Further, bauxite crushing raw ore grinds to 2-3CM and is sized to 70%-200 mesh, the solid content of ore pulp A be for
25-35%, adds sodium carbonate in alumina green ore process of lapping, and the adding proportion of sodium carbonate is the 1-5kg/t of raw ore, carbonic acid
Slurry pH is not only adjusted in sodium, but also has peptizaiton.
Further, ore pulp A obtains the ore pulp B of 25-35%PH value 8-11 after solid-liquid separation treatment, both reduces raw ore slurry
Impurity reduces flotation of ore pulp amount again, can reduce 10-30% collector dosage.Collecting agent secondary use is scanned in ore pulp D entrance to be reduced
20% dosage.
Further, it scans when underflow product ore pulp E is separated by solid-liquid separation and obtains chats recycling compared with original technique
10% or more concentrate yield can be improved.
Further, ore pulp F solid solid content when being separated by solid-liquid separation is small, can be conducive to tailing post-processing.
Further, slurry pH is maintained at 8-11 in drop silicon impurity-removing method of the present invention.
Compared with prior art, the invention has the following advantages:
Silicon impurity-removing method, compared with existing beneficiation flowsheet, the choosing of same mineral drop in a kind of low-grade bauxite of the present invention
It is not changed to by traditional pure floatation process with mechanically decoupled supplemented by main flotation and to generate chats technique, not only collecting agent uses
Amount is reduced, and alumina silica ratio is made to improve 1-4 point more；Carrying out back choosing to the chats that secondary separation generates more than enough can improve 10%
Above concentrate yield, it is few containing pharmaceutical quantities in concentrate, and in concentrate with raw ore compared with the harmful substance contents such as sulphur, carbon, calcium drop
It is low；The content of silicate is higher in tailing, can reach illitic standard, can be used as ceramics, refractory brick raw material recycling,
The effective use exploitation of low-grade bauxite drop silicon impurity-removing method of the present invention, can provide for China's alumina producing increase
Good aluminium concentrate has good economic results in society, also has ten to China's aluminum i ndustry sustainable development and circulation construction
Divide important meaning.
Detailed description of the invention
Fig. 1 is the process flow chart that silicon impurity-removing method drops in low-grade bauxite of the present invention.
Specific embodiment
It elaborates in the following with reference to the drawings and specific embodiments to the present invention, the present embodiment is with technical solution of the present invention
Premise, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Silicon impurity-removing method drops in a kind of low-grade bauxite, and the drop silicon impurity-removing method is first by bauxite crushing raw ore and grinds
Mill is sieved into ore pulp A, and ore pulp A enters mechanical separation equipment A and is separated by solid-liquid separation to obtain solid A and liquid A, the solid A
Adding water to be made into solid content is 25-35% ore pulp B, and ore pulp B, which enters after technique is scanned in roughing, obtains foam product ore pulp C and roughing bottom
Object is flowed, wherein foam product ore pulp C obtains solid B and liquid B after mechanical separation equipment B separation of solid and liquid, and the solid B is most
Whole concentrate, liquid B are ore pulp D, and the ore pulp D is scanned after mixing with roughing underflow object, scanned to obtain underflow ore pulp E and pass through
Crossing mechanical separation equipment C and obtaining solid C and liquid C, the solid C is chats, and chats is added in raw ore and regrinds, liquid C
The solid D and liquid D that as ore pulp F, ore pulp F are obtained after mechanical dehydration, wherein solid D is true tailings, and liquid D enters
Clear water reserviors are recycled；It is described sodium carbonate is added according to the ratio of raw ore 1-5kg/t when grinding to raw ore to be uniformly mixed, then
Water is added and is configured to the ore pulp A that solid content is 20-25%；It is described when preparing ore pulp B according to the ratio of raw ore 500-1200g/t
Synthetic fatty acid collecting agent is added and adjusts the pH value of ore pulp B to 8-11；The flow velocity of rougher process is 0.5-0.8m3/m2·
Min, duration 15-25min.
Preferably, described be crushed is the particle for being -2-3cm by crushing raw ore to granularity.
Preferably, the grinding is that the alumina green ore of broken mistake is entered mechanical equipment to grind and add water, carbon
Sour sodium is sized to 70%-200 mesh, is modulated into ore pulp A, and the pH value of ore pulp A is 8-11.
Preferably, mechanical separation equipment A, mechanical separation equipment B, mechanical separation equipment in the drop silicon impurity-removing method
C is sleeping spiral shell dehydration seperator.
Preferably, flocculant polystyrene amine, wherein synthetic fatty acid collecting agent, sodium carbonate, poly- third is added in ore pulp F
Vinylamine is commercially available.
Collecting agent can be reduced when preferably, the reduction of particulate impurity entering flotation when the ore pulp A carries out mechanically decoupled
Dosage improves roughing, scavenger concentrate index；Collecting agent is scanned in ore pulp D entrance can secondary use.
Preferably, when the ore pulp B roughing, the upper foam ore pulp C scanned carry out solid-liquid separation treatment ,+1000
Mesh solid matter is final concentrate, and product liquid ore pulp D., which enters, sweeps flotation, no longer secondary dosing.
Preferably, it is true tailings, liquid that flocculant, which is added, through mechanical dewatering equipment dewatered solids in the ore pulp F
It is reusable to import clear water reserviors.
Preferably, tailing water is reusable in the drop silicon impurity-removing method, tailing dry row.
Preferably ,+1000 mesh solid matters are final concentrate, -1000 mesh when ore pulp C carries out solid-liquid separation treatment
Product liquid is ore pulp D.Concentrate grading granularity is thinner compared with original technique, can reduce the content of sulphur in concentrate, carbon, calcium
Index.
Preferably, bauxite crushing raw ore grinds to 2-3CM and be sized to 70%-200 mesh, the solid content of ore pulp A is
For 25-35%, sodium carbonate is added in alumina green ore process of lapping, the adding proportion of sodium carbonate is the 1-5kg/t of raw ore, carbon
Slurry pH is not only adjusted in sour sodium, but also has peptizaiton.
Preferably, ore pulp A obtains the ore pulp B of 25-35%PH value 8-11 after solid-liquid separation treatment, raw ore is both reduced
Slurry impurity reduces flotation of ore pulp amount again, can reduce 10-30% collector dosage.
Chats recycling and original technique phase are obtained preferably, scanning when underflow product ore pulp E is separated by solid-liquid separation
Than the concentrate yield that can be improved 10% or more.
Preferably, ore pulp F solid solid content when being separated by solid-liquid separation is small, tailing post-processing can be conducive to.
Preferably, of the present invention be maintained at 8-11 for slurry pH in silicon impurity-removing method.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention is as above with preferred embodiment description, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when a little change or modification made using technology contents described above
It is the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention, according to the technical essence of the invention
Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.
Case study on implementation:
In small-sized ore concentration of bauxite factory, Ruzhou City, Henan Province self-built one, made using beneficiation method of the present invention within 2016
The data comparison obtained after industry is as follows:
The first, selected link being cut on the basis of traditional handicraft and increasing mechanically decoupled treatment process, index is as follows:
320 tons of mill head, 202 tons of concentrate are obtained, yield 63%, concentrate alumina silica ratio improves 4.0 for 6.2,2.2 than raw ore.
The second, selected link has been cut on the basis of traditional handicraft to increase mechanically decoupled technique out and generate chats
Technique, index are as follows:
260 tons of mill head, 170 tons of concentrate are obtained, yield 65%, concentrate alumina silica ratio 7.1,2.2 than raw ore improve 4.9.
Claims (4)
1. silicon impurity-removing method drops in a kind of low-grade bauxite, it is characterised in that: the drop silicon impurity-removing method is first by bauxite original
Mine, which is crushed and grinds, is sieved into ore pulp A, and ore pulp A enters mechanical separation equipment A and is separated by solid-liquid separation to obtain solid A and liquid A,
It is 25-35% ore pulp B that the solid A, which adds water to be made into solid content, and ore pulp B, which enters after technique is scanned in roughing, obtains foam product ore pulp C
With roughing underflow object, wherein foam product ore pulp C obtains solid B and liquid B after mechanical separation equipment B separation of solid and liquid, described
Solid B is final concentrate, and liquid B is ore pulp D, and the ore pulp D is scanned after mixing with roughing underflow object, scanned to obtain underflow
It is chats that ore pulp E and process mechanical separation equipment C, which obtain solid C and liquid C, the solid C, and chats is added in raw ore and grinds again
Mill, liquid C is ore pulp F, the solid D and liquid D that ore pulp F is obtained after mechanical dehydration, and wherein solid D is true tailings,
Liquid D enters clear water reserviors recycling；Sodium carbonate mixing is added according to the ratio of raw ore 1-5kg/t when grinding to raw ore
It is even, it adds water and is configured to the ore pulp A that solid content is 20-25%；When preparing ore pulp B according to the ratio of raw ore 500-1200g/t
Synthetic fatty acid collecting agent is added and adjusts the pH value of ore pulp B to 8-11；The flow velocity of rougher process is 0.5-0.8m3/m2·
Min, duration 15-25min.
2. silicon impurity-removing method drops in a kind of low-grade bauxite as described in claim 1, it is characterised in that: it is described it is broken be will be former
Mine is crushed to the particle that granularity is 2-3cm.
3. silicon impurity-removing method drops in a kind of low-grade bauxite as described in claim 1, it is characterised in that: the grinding be by
The alumina green ore being crushed enters mechanical equipment and grinds and add water, sodium carbonate to be sized to 70%-200 mesh, is modulated into ore pulp A, mine
The pH value for starching A is 8-11.
4. silicon impurity-removing method drops in a kind of low-grade bauxite as described in claim 1, it is characterised in that: the drop silicon removal of impurities side
Mechanical separation equipment A, mechanical separation equipment B, mechanical separation equipment C are sleeping spiral shell dehydration seperator in method.
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| CN201810365919.9A CN110385196B (en) | 2018-04-23 | 2018-04-23 | Silicon-reducing and impurity-removing method for low-grade bauxite |
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| CN201810365919.9A CN110385196B (en) | 2018-04-23 | 2018-04-23 | Silicon-reducing and impurity-removing method for low-grade bauxite |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB730347A (en) * | 1952-07-25 | 1955-05-18 | Aluminium Lab Ltd | Apparatus for the treatment of finely divided fluidizable solid material |
| JPH08100176A (en) * | 1994-09-29 | 1996-04-16 | Sumitomo Chem Co Ltd | Production of agricultural material |
| CN202700637U (en) * | 2012-07-10 | 2013-01-30 | 河南东大矿业股份有限公司 | Bauxite flotation equipment without heat source |
| CN103157558A (en) * | 2013-03-25 | 2013-06-19 | 江西铜业股份有限公司 | Beneficiation method of recovering sulfur from copper sulfide ore flotation tailings |
| CN103272694A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Magnetic-gravity separation technology for Anshan type lean magnetite |
| CN203678523U (en) * | 2014-01-14 | 2014-07-02 | 会理县鹏晨废渣利用有限公司 | Copper smelting waste residue recovery processing system |
-
2018
- 2018-04-23 CN CN201810365919.9A patent/CN110385196B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB730347A (en) * | 1952-07-25 | 1955-05-18 | Aluminium Lab Ltd | Apparatus for the treatment of finely divided fluidizable solid material |
| JPH08100176A (en) * | 1994-09-29 | 1996-04-16 | Sumitomo Chem Co Ltd | Production of agricultural material |
| CN202700637U (en) * | 2012-07-10 | 2013-01-30 | 河南东大矿业股份有限公司 | Bauxite flotation equipment without heat source |
| CN103157558A (en) * | 2013-03-25 | 2013-06-19 | 江西铜业股份有限公司 | Beneficiation method of recovering sulfur from copper sulfide ore flotation tailings |
| CN103272694A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Magnetic-gravity separation technology for Anshan type lean magnetite |
| CN203678523U (en) * | 2014-01-14 | 2014-07-02 | 会理县鹏晨废渣利用有限公司 | Copper smelting waste residue recovery processing system |
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