CN107812605B - A kind of ore-dressing technique mentioning copper drop silicon - Google Patents
A kind of ore-dressing technique mentioning copper drop silicon Download PDFInfo
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- CN107812605B CN107812605B CN201711119336.XA CN201711119336A CN107812605B CN 107812605 B CN107812605 B CN 107812605B CN 201711119336 A CN201711119336 A CN 201711119336A CN 107812605 B CN107812605 B CN 107812605B
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
Abstract
The invention belongs to nonferrous metal resource recovery and utilization technologies, it is a kind of ore-dressing technique for mentioning copper drop silicon, raw ore enters semi-autogenous mill and ball mill ore grinding after coarse crushing, obtains qualified crude ore pulp, crude ore pulp is after flotation device coarse scan choosing, it obtains rougher concentration and scans tailing, it scans tailing and is sent into tailing filling system, rougher concentration enters ball mill and regrinds, and obtains qualified rougher concentration ore pulp, rougher concentration ore pulp is selected using flotation column, obtains flotation concentrates；The present invention combines the technical measures such as floatation process and mixed reagent regime of agent using Semi-Autogenous grinding process, column, form " mention copper drop silicon " novel technique, the technique to keep and improve the ecological environment, improve Utilization Rate of Mineral Resources, promotion Mine Sustainable Development is of great significance.
Description
Technical field
The invention belongs to nonferrous metal resource utilization technology field, especially a kind of ore-dressing technique for mentioning copper drop silicon.
Background technique
80% is produced with pyrometallurgical smelting in current copper yield primary in the world, and about 20% is produced with hydrometallurgy, copper smelting by pyrometallurgy
For handling various copper concentrates, the copper scap of copper-sulphide ores, wet type copper smelting commonly used in processing cupric oxide ore, low-grade abandoned mine,
Residual mine and difficulty select grandidierite etc. in cheating.When to smelt copper concentrate middle arteries stone with silicon be main, melting generally uses high silicon slag type, clinker warp
Slag cleaning furnace or precipitating furnace processing, to further decrease Copper in Slag.SiO2It is the main component of fayalite slag, it contains in slag
Amount influences greatly the property of clinker and Copper in Slag, and data shows SiO according to the study2(slag Wen Heng when increasing above 42% of content
It is fixed), slag viscosity greatly increases, and mutually separates to hinder, and slag viscosity influence has been more than the influence of interfacial tension, as a result copper is made to exist
The expected raising of mechanical loss and total losses in slag.Therefore, SiO in slag during Copper making2Maintain appropriate level range
It is interior, it is ensured that fusion process viscosity is suitable, and melt temperature is relatively low, and Copper in Slag is minimum, SiO in copper concentrate2Content is moderate (generally
It 10% or so) is key condition.Due to part dressing plant is because of ore properties or production technology etc., there are SiO in copper concentrate2
The phenomenon that content higher (35%~40% or so), brings smelting furnace energy consumption to increase and reduces the influence in furnace longevity, no to subsequent smelting
Sharp economic benefit improves.High quality burden is smelted to realize, adapts to Metallurgical Industry to raw mineral materials high quality demand, it is necessary to
Carry out the research and tackling key problem for improving Cu Concentrate Grade.
Summary of the invention
It is higher the invention aims to solve the content of silica in sedimentary-reworked type glutenite copper concentrate, after giving
The problems such as continuous smelting brings smelting furnace energy consumption to increase and reduce the influence in furnace longevity, while unfavorable economic benefit improves, provides one kind
Propose the ore-dressing technique of copper drop silicon.
The present invention is realized by following scheme:
A kind of ore-dressing technique mentioning copper drop silicon, raw ore enter semi-autogenous mill and ball mill ore grinding after coarse crushing, are closed
The crude ore pulp of lattice, crude ore pulp obtain rougher concentration and scan tailing after flotation device coarse scan choosing, scan tailing and are sent into tail
Mine filling system, rougher concentration enter ball mill and regrind, and obtain qualified rougher concentration ore pulp, rougher concentration ore pulp is using floating
It selects column selected, obtains flotation concentrates；
Specific step is as follows:
(1) raw ore comminution operation: by partial size≤700mm raw ore by crusher coarse crushing to 250mm hereinafter, after coarse crushing
Raw ore is sent into semi-autogenous mill and carries out ore grinding, and control ore milling concentration is 75-80%, by partial size≤250mm raw ore be milled to 2mm with
Under, in the closed circuit grinding classification process of semi-autogenous mill and drum sieve composition, ore pulp of the partial size greater than 2mm is back to semi-autogenous mill
In carry out ore grinding again, partial size≤2mm ore pulp is sent into cyclone through drum sieve and is classified, in cyclone and ball milling unit
At closed circuit grinding classification process in, control ore milling concentration be 70-75%, the ore pulp of partial size > 0.074mm is after hydrocyclone sand
It is back to ball mill and carries out ore grinding again, cyclone overflow obtains the qualified crude ore pulp of overflow fineness 60%, controls effluent concentration
For 30-35%；
(2) raw ore coarse scan is elected to be industry: qualified crude ore pulp carries out roughing into roughing flotation device through cyclone overflow, control
Flotation pulp concentration processed is 28-30%, pH=7-7.5 of ore pulp, and collecting agent mixing xanthate, the addition of the mixing xanthate is first added
Amount is 75-85g/t, adds No. 2 oil of foaming agent, and No. 2 oily additional amounts are 55-65g/t, collects the mineral on upper layer, obtains
To rougher concentration, the mineral for being sunken to lower layer are rougher tailings；Rougher tailings flow to scavenging flotation machine certainly and is scanned, and is first added and lives
Agent vulcanized sodium, the additional amount of the vulcanized sodium are 490-510g/t, add collecting agent mixing xanthate, the mixing xanthate
Additional amount is 55-65g/t, is eventually adding No. 2 oil of foaming agent, and No. 2 oily additional amounts are 38-42g/t, and collection floats on upper layer
Mineral, be pumped to roughing flotation device formation return to closed circuit flotation flowsheet in proper order, be sunken to lower layer mineral be scan tailing, be sent into
Tailing filling system；
(3) rougher concentration Regrinding: rougher concentration is pumped to the closed circuit grinding classification stream of cyclone and ball mill composition
Grind grading is carried out in journey, rougher concentration is regrinded to partial size≤0.043mm, control ore milling concentration is 65-70%, partial size >
Ore pulp of the ore pulp of 0.043mm after hydrocyclone sand is back to ball mill and regrinds, cyclone overflow obtain partial size≤
The rougher concentration ore pulp of 0.043mm85% qualification, control effluent concentration are 25-28%；
(4) the selected operation of rougher concentration: qualified rougher concentration ore pulp carried out through cyclone overflow into flotation column it is selected,
Controlling selected pulp density is 20-25%, pH=7.0-7.5 of ore pulp, collects the flotation concentrates on upper layer, the flotation concentrates
The grade of middle copper is 40-45%, silicone content 13-15%, and the mineral for being sunken to lower layer are flotation chats, and flotation chats is pumped to roughing
Flotation device formation returns to closed circuit flotation flowsheet in proper order.
Preferably, copper content is 0.9-1.0%, silicone content 35-40% in raw ore in heretofore described step (1).
Preferably, the mixing xanthate in heretofore described step (2) is by butyl xanthate and butyl ammonium aerofloat according to quality
Than being formed for 4:1.
The present invention, in conjunction with ore properties, has invented one kind on the basis of to domestic and international advanced preparation equipment, technical study
It is suitable for the ore-dressing technique of sedimentary-reworked type glutenite copper mine.By using Semi-Autogenous grinding process, column joint flotation work
The technical measures such as skill, mixed reagent regime of agent form " mentioning copper drop silicon " novel technique.The technique is to holding and improves ecology
Environment improves Utilization Rate of Mineral Resources, Mine Sustainable Development is promoted to be of great significance, and is embodied in: (1) improving warp
Benefit of helping is conducive to reality using technological measures such as Semi-Autogenous+ball mill corase grinding throwing tail, the flotation of column joint and mixed reagents
The technical indicator that the raising of existing Copper in Concentrate content and silicone content reduce, while being also beneficial to reduce beneficiation cost, to mention
The purpose of high mine economic profit.(2) tailings discharging is reduced, since corase grinding throws tail, coarse granule content obviously increases in beneficiation tailing
Add, is conducive to improve tailing-filled tailing-filled utilization rate in the process, reduces tailings discharging, alleviate safety and ring that tailings is stacked
Protect problem.
One aspect of the present invention uses Semi-Autogenous+ball milling (SAB) grinding flowsheet, and equipment Large Efficient is high to stickiness, moisture content
Mineral grinding efficiency more adapt to；Another aspect raw ore throws tail, coarse concentrate regrinding flotation recovery copper mineral after scanning.Roughing uses
Flotation device, while " synergistic effect " of utilization mixed reagent strengthens collecting copper mineral, selected utilization flotation column is suitable for sorting micro-
The characteristic of fine mineral replaces traditional flotation device using flotation column, further realizes the double raisings of concentrate grade, the rate of recovery.Through
Crossing situ industrial production practices proves, in mill head cupric 0.9-1.0%, can make copper concentrate product using the technical matters
Position reaches 40-45%, and copper recovery reaches 90% or more, in flotation concentrates the content control of silicon 14% or so, technical indicator compared with
For ideal, is conducive to subsequent smelting and realizes high quality burden.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Embodiment 1
Referring to Fig. 1, the present embodiment it is a kind of mention copper drop silicon ore-dressing technique, raw ore after coarse crushing enter semi-autogenous mill and
Ball mill ore grinding, obtains qualified crude ore pulp, and crude ore pulp obtains rougher concentration and scan tail after flotation device coarse scan choosing
Mine scans tailing and is sent into tailing filling system, and rougher concentration enters ball mill and regrinds, and obtains qualified rougher concentration ore pulp, slightly
Concentrate selection ore pulp is selected using flotation column, obtains flotation concentrates；
Specific step is as follows:
(1) raw ore comminution operation: by partial size≤700mm raw ore by crusher coarse crushing to 250mm hereinafter, the raw ore
Middle copper content is 0.97%, silicone content 37.23%；Raw ore after coarse crushing, which is sent into semi-autogenous mill, carries out ore grinding, and control ore grinding is dense
Degree is 78%, and partial size≤250mm raw ore is milled to 2mm hereinafter, the closed circuit grinding classification stream formed in semi-autogenous mill and drum sieve
Cheng Zhong, ore pulp of the partial size greater than 2mm is back in semi-autogenous mill carries out ore grinding again, and partial size≤2mm ore pulp is sent through drum sieve
Enter in cyclone and be classified, in the closed circuit grinding classification process of cyclone and ball mill composition, control ore milling concentration is
The ore pulp of 72%, partial size > 0.074mm are back to ball mill after hydrocyclone sand and carry out ore grinding again, and cyclone overflow obtains
The qualified crude ore pulp of overflow fineness 60%, control effluent concentration are 32%；
(2) raw ore coarse scan is elected to be industry: qualified crude ore pulp carries out roughing into roughing flotation device through cyclone overflow, control
Flotation pulp concentration is 29%, pH=7.2 of ore pulp, and collecting agent mixing xanthate is first added, and the additional amount of the mixing xanthate is
80g/t, the mixing xanthate are made of butyl xanthate and butyl ammonium aerofloat according to mass ratio for 4:1, add foaming agent 2
Oil, No. 2 oily additional amounts are 60g/t, collect the mineral on upper layer, obtain rougher concentration, and the mineral for being sunken to lower layer are roughing
Tailing；Rougher tailings flow to scavenging flotation machine certainly and is scanned, and activator vulcanized sodium is first added, and the additional amount of the vulcanized sodium is
500g/t adds collecting agent mixing xanthate, and the additional amount of the mixing xanthate is 60g/t, and the mixing xanthate is by butyl
Xanthate and butyl ammonium aerofloat are that 4:1 is formed according to mass ratio, are eventually adding No. 2 oil of foaming agent, and No. 2 oily additional amounts are 40g/
T collects supernatant mineral, is pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order, is sunken to the mineral of lower layer
To scan tailing, it is sent into tailing filling system；
(3) rougher concentration Regrinding: rougher concentration is pumped to the closed circuit grinding classification stream of cyclone and ball mill composition
Grind grading is carried out in journey, rougher concentration is regrinded to partial size≤0.043mm, and controlling ore milling concentration is 68%, partial size >
Ore pulp of the ore pulp of 0.043mm after hydrocyclone sand is back to ball mill and regrinds, cyclone overflow obtain partial size≤
The rougher concentration ore pulp of 0.043mm85% qualification, control effluent concentration are 26%；
(4) the selected operation of rougher concentration: qualified rougher concentration ore pulp carried out through cyclone overflow into flotation column it is selected,
Controlling selected pulp density is 23%, and the flotation concentrates on upper layer, copper in the flotation concentrates are collected in pH=7.2 of ore pulp
Grade be 42.27%, the rate of recovery of copper is 90.52%, silicone content 14.21%, and the mineral for being sunken to lower layer are flotation chats, is floated
It chooses mine to be pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order.
It is 0.97% by the raw ore copper content of the present embodiment, silicone content 37.23%, using traditional handicraft, (muck uses two
One closed circuit flow of section, muck product obtain copper concentrate after one section of closed circuit grinding, then through " two thick two sweep two essences " flotation flowsheet
Product) ore dressing is carried out, after the completion of ore dressing, the grade for obtaining Copper in Concentrate is 24.45%, and the rate of recovery of copper is 89.65%, and silicon contains
Amount is 26.13%；Ore dressing is carried out with the ore-dressing technique of the present embodiment, increases production Mine Cu in 60t or more, concentrate up to the year after next up to standard is produced
Metallurgical cost reduces by 50 yuan/t, increases benefit in year up to 2,500,000 yuan or more.It can be seen that silicon drops in a kind of copper that mentions of the present embodiment
Ore-dressing technique, comprehensive beneficiation cost is low, and the grade of Copper in Concentrate is high, and the rate of recovery of copper is high, and silicone content is moderate, illustrates this reality
It is best for applying the ore-dressing technique of example.
Embodiment 2
Referring to Fig. 1, the present embodiment it is a kind of mention copper drop silicon ore-dressing technique, raw ore after coarse crushing enter semi-autogenous mill and
Ball mill ore grinding, obtains qualified crude ore pulp, and crude ore pulp obtains rougher concentration and scan tail after flotation device coarse scan choosing
Mine scans tailing and is sent into tailing filling system, and rougher concentration enters ball mill and regrinds, and obtains qualified rougher concentration ore pulp, slightly
Concentrate selection ore pulp is selected using flotation column, obtains flotation concentrates；
Specific step is as follows:
(1) raw ore comminution operation: by partial size≤700mm raw ore by crusher coarse crushing to 250mm hereinafter, the raw ore
Middle copper content is 0.91%, silicone content 35.8%；Raw ore after coarse crushing, which is sent into semi-autogenous mill, carries out ore grinding, controls ore milling concentration
It is 75%, partial size≤250mm raw ore is milled to 2mm hereinafter, the closed circuit grinding classification process formed in semi-autogenous mill and drum sieve
In, ore pulp of the partial size greater than 2mm is back in semi-autogenous mill carries out ore grinding again, and partial size≤2mm ore pulp is sent into through drum sieve
It is classified in cyclone, in the closed circuit grinding classification process of cyclone and ball mill composition, control ore milling concentration is 70%,
The ore pulp of partial size > 0.074mm is back to ball mill after hydrocyclone sand and carries out ore grinding again, and cyclone overflow obtains overflow
The qualified crude ore pulp that fineness is 60%, control effluent concentration are 30%；
(2) raw ore coarse scan is elected to be industry: qualified crude ore pulp carries out roughing into roughing flotation device through cyclone overflow, control
Flotation pulp concentration is 28%, pH=7.0 of ore pulp, and collecting agent mixing xanthate is first added, and the additional amount of the mixing xanthate is
75g/t, the mixing xanthate are made of butyl xanthate and butyl ammonium aerofloat according to mass ratio for 4:1, add foaming agent 2
Oil, No. 2 oily additional amounts are 65g/t, collect the mineral on upper layer, obtain rougher concentration, and the mineral for being sunken to lower layer are roughing
Tailing；Rougher tailings flow to scavenging flotation machine certainly and is scanned, and activator vulcanized sodium is first added, and the additional amount of the vulcanized sodium is
490g/t adds collecting agent mixing xanthate, and the additional amount of the mixing xanthate is 55g/t, and the mixing xanthate is by butyl
Xanthate and butyl ammonium aerofloat are that 4:1 is formed according to mass ratio, are eventually adding No. 2 oil of foaming agent, and No. 2 oily additional amounts are 38g/
T collects supernatant mineral, is pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order, is sunken to the mineral of lower layer
To scan tailing, it is sent into tailing filling system；
(3) rougher concentration Regrinding: rougher concentration is pumped to the closed circuit grinding classification stream of cyclone and ball mill composition
Cheng Jinhang grind grading regrinds rougher concentration to partial size≤0.043mm, and controlling ore milling concentration is 65%, partial size > 0.043mm
Ore pulp of the ore pulp after hydrocyclone sand be back to ball mill and regrind, it is qualified that cyclone overflow obtains partial size≤0.043mm85%
Rougher concentration ore pulp, control effluent concentration be 25%；
(4) the selected operation of rougher concentration: qualified rougher concentration ore pulp carried out through cyclone overflow into flotation column it is selected,
Controlling selected pulp density is 20%, and the flotation concentrates on upper layer, copper in the flotation concentrates are collected in pH=7.0 of ore pulp
Grade be 44.32%, the rate of recovery of copper is 92.32%, silicone content 14.78%, and the mineral for being sunken to lower layer are flotation chats, is floated
It chooses mine to be pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order.
Embodiment 3
Referring to Fig. 1, the present embodiment it is a kind of mention copper drop silicon ore-dressing technique, raw ore after coarse crushing enter semi-autogenous mill and
Ball mill ore grinding, obtains qualified crude ore pulp, and crude ore pulp obtains rougher concentration and scan tail after flotation device coarse scan choosing
Mine scans tailing and is sent into tailing filling system, and rougher concentration enters ball mill and regrinds, and obtains qualified rougher concentration ore pulp, slightly
Concentrate selection ore pulp is selected using flotation column, obtains flotation concentrates；
Specific step is as follows:
(1) raw ore comminution operation: by partial size≤700mm raw ore by crusher coarse crushing to 250mm hereinafter, the raw ore
Middle copper content is 0.99%, silicone content 39.8%；Raw ore after coarse crushing, which is sent into semi-autogenous mill, carries out ore grinding, controls ore milling concentration
It is 80%, partial size≤250mm raw ore is milled to 2mm hereinafter, the closed circuit grinding classification process formed in semi-autogenous mill and drum sieve
In, ore pulp of the partial size greater than 2mm is back in semi-autogenous mill carries out ore grinding again, and partial size≤2mm ore pulp is sent into through drum sieve
It is classified in cyclone, in the closed circuit grinding classification process of cyclone and ball mill composition, control ore milling concentration is 75%,
The ore pulp of partial size > 0.074mm is back to ball mill after hydrocyclone sand and carries out ore grinding again, and cyclone overflow obtains overflow
The qualified crude ore pulp that fineness is 60%, control effluent concentration are 35%；
(2) raw ore coarse scan is elected to be industry: qualified crude ore pulp carries out roughing into roughing flotation device through cyclone overflow, control
Flotation pulp concentration is 30%, pH=7.5 of ore pulp, and collecting agent mixing xanthate is first added, and the additional amount of the mixing xanthate is
85g/t, the mixing xanthate are made of butyl xanthate and butyl ammonium aerofloat according to mass ratio for 4:1, add foaming agent 2
Oil, No. 2 oily additional amounts are 65g/t, collect the mineral on upper layer, obtain rougher concentration, and the mineral for being sunken to lower layer are roughing
Tailing；Rougher tailings flow to scavenging flotation machine certainly and is scanned, and activator vulcanized sodium is first added, and the additional amount of the vulcanized sodium is
510g/t adds collecting agent mixing xanthate, and the additional amount of the mixing xanthate is 55g/t, and the mixing xanthate is by butyl
Xanthate and butyl ammonium aerofloat are that 4:1 is formed according to mass ratio, are eventually adding No. 2 oil of foaming agent, and No. 2 oily additional amounts are 42g/
T collects supernatant mineral, is pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order, is sunken to the mineral of lower layer
To scan tailing, it is sent into tailing filling system；
(3) rougher concentration Regrinding: rougher concentration is pumped to the closed circuit grinding classification stream of cyclone and ball mill composition
Grind grading is carried out in journey, rougher concentration is regrinded to partial size≤0.043mm, and controlling ore milling concentration is 70%, partial size >
Ore pulp of the ore pulp of 0.043mm after hydrocyclone sand is back to ball mill and regrinds, cyclone overflow obtain partial size≤
The rougher concentration ore pulp of 0.043mm85% qualification, control effluent concentration are 28%；
(4) the selected operation of rougher concentration: qualified rougher concentration ore pulp carried out through cyclone overflow into flotation column it is selected,
Controlling selected pulp density is 25%, and the flotation concentrates on upper layer, copper in the flotation concentrates are collected in pH=7.5 of ore pulp
Grade be 40.83%, the rate of recovery of copper is 92.31%, silicone content 13.98%, and the mineral for being sunken to lower layer are flotation chats, is floated
It chooses mine to be pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order.
Claims (2)
1. a kind of ore-dressing technique for mentioning copper drop silicon, it is characterised in that the following steps are included:
(1) raw ore comminution operation: by partial size≤700mm raw ore by crusher coarse crushing to 250mm hereinafter, raw ore after coarse crushing
It is sent into semi-autogenous mill and carries out ore grinding, control ore milling concentration is 75-80%, and partial size≤250mm raw ore is milled to 2mm hereinafter, In
In the closed circuit grinding classification process of semi-autogenous mill and drum sieve composition, ore pulp of the partial size greater than 2mm is back in semi-autogenous mill again
Secondary carry out ore grinding, partial size≤2mm ore pulp are sent into cyclone through drum sieve and are classified, and form in cyclone and ball mill
In closed circuit grinding classification process, control ore milling concentration is 70-75%, and the ore pulp of partial size > 0.074mm returns after hydrocyclone sand
Ore grinding is carried out again to ball mill, and cyclone overflow obtains the qualified crude ore pulp of overflow fineness 60%, and control effluent concentration is
30-35%；Copper content is 0.9-1.0%, silicone content 35-40% in the raw ore；
(2) raw ore coarse scan is elected to be industry: qualified crude ore pulp carries out roughing into roughing flotation device through cyclone overflow, and control is floating
Selecting pulp density is 28-30%, pH=7-7.5 of ore pulp, and collecting agent mixing xanthate is first added, and the additional amount of the mixing xanthate is
75-85g/t adds No. 2 oil of foaming agent, and No. 2 oily additional amounts are 55-65g/t, collect the mineral on upper layer, obtains thick
Concentrate selection, the mineral for being sunken to lower layer are rougher tailings；Rougher tailings flow to scavenging flotation machine certainly and is scanned, and activator is first added
Vulcanized sodium, the additional amount of the vulcanized sodium are 490-510g/t, add collecting agent mixing xanthate, the addition of the mixing xanthate
Amount is 55-65g/t, is eventually adding No. 2 oil of foaming agent, and No. 2 oily additional amounts are 38-42g/t, collects supernatant mine
Object is pumped to the formation of roughing flotation device and returns to closed circuit flotation flowsheet in proper order, and the mineral for being sunken to lower layer are to scan tailing, are sent into tailing
Filling system；
(3) rougher concentration Regrinding: rougher concentration is pumped in the closed circuit grinding classification process of cyclone and ball mill composition
Grind grading is carried out, rougher concentration is regrinded to partial size≤0.043mm, control ore milling concentration is 65-70%, partial size > 0.043mm
Ore pulp of the ore pulp after hydrocyclone sand be back to ball mill and regrind, it is qualified that cyclone overflow obtains partial size≤0.043mm85%
Rougher concentration ore pulp, control effluent concentration be 25-28%；
(4) the selected operation of rougher concentration: qualified rougher concentration ore pulp carries out selected, control through cyclone overflow into flotation column
Selected pulp density is 20-25%, pH=7.0-7.5 of ore pulp, collects the flotation concentrates on upper layer, copper in the flotation concentrates
Grade be 40-45%, silicone content 13-15%, the mineral for being sunken to lower layer are flotation chats, and flotation chats is pumped to roughing flotation
Machine formation returns to closed circuit flotation flowsheet in proper order.
2. a kind of ore-dressing technique for mentioning copper drop silicon according to claim 1, it is characterised in that: mixed in the step (2)
Xanthate is closed to be made of butyl xanthate and butyl ammonium aerofloat according to mass ratio for 4:1.
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| CN114653471A (en) * | 2022-04-11 | 2022-06-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for improving beneficiation efficiency of copper sulfide ore |
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