CN102513204A - Beneficiation method of sieving and flotation combination process for recycled copper of copper smelting converter slag - Google Patents

Abstract

The invention discloses a beneficiation method of sieving and flotation combination process for recycled copper of copper smelting converter slag. The beneficiation method includes steps that the converter slag is fed into a ball mill after being crushed, and is sieved and graded after being milled, and after being sieved twice, oversize fraction products with sizes larger than 2mm are returned to the ball mill to be milled again; undersize fraction products with sizes smaller than 2mm and oversize fraction products with sizes larger than 0.1mm can be directly used as copper concentrate products; undersize fraction products with sizes smaller than 0.1mm can be floated after size mixing and being added with flotation chemicals; and copper concentrate products are obtained via three times of rough concentration and once scavenging. The sieving and flotation combination process is adopted, so that coarse copper grains are effectively recycled in advance. The beneficiation method is wide in application range, convenient in operation and low in cost, not only directly improves benefits of enterprises, but also realizes development and utilization of resources of high-grade copper converter slag.

Description

The copper converter slag reclaims screening, the joint flotation technology beneficiation method of copper

The (1) technical field: the present invention relates to a kind of beneficiation method in metallurgical chemistry field, specifically is screening, joint flotation technology beneficiation method that a kind of copper converter slag reclaims copper.

The (2) prior art: converter is higher with blowing slag copper content usually, and domestic part copper smeltery send copper blast-furnace to reclaim copper as returning charge it, and last waste has only the copper Water Quenching Slag.Though converter is higher with blowing slag copper content, is lower than copper concentrate as its copper grade of raw materials for metallurgy, not only increase the smelting energy consumption, influence and smelt production efficiency, and the comprehensive utilization of resources level is low.

China's processing copper slag method commonly used has two: one, and pyrogenic process promptly adopts the dilution of dilution stove.Owing to return remelting, the objectionable impurities of smelting is got into smelting furnace once more, make objectionable impurities enrichment gradually, and the returning of cold slag, metallurgical effect and smelting cost there are very big influence, finally cause slag viscosity to increase, the slag cupric is higher, and smelting cost strengthens; The 2nd, beneficiating method promptly can obtain qualified copper concentrate through flotation, supplies copper smelting by pyrometallurgy, and copper recovery is more than 90%, and flotation tailing is as cement raw material.Patent application like Chinese invention patent application number 201110275028.2; A kind of " reclaiming the floating beneficiation combined method method of magnetic of copper from the copper converter slag " disclosed; This method adopts magnetic separation and flotation combined beneficiation method, utilizes high, the good toughness of the bright copper hardness of coarse grain, difficult broken difficult mill; The copper smelting slag iron content is high, magnetic mineral content is high, and the bright copper of coarse grain belongs to the characteristics of non-magnetic separation mineral, and through magnetic separation, the bright copper of most of coarse grain is that the non magnetic ore enrichment can directly become copper concentrate to magnetic tailing, has obtained effect preferably.But the non magnetic gangue mineral of magnetic separation procedure division also gets into copper concentrate, and the copper concentrate grade of generation is lower, and therefore, this process still has improved space.

The (3) summary of the invention: the object of the invention just provides screening, the joint flotation technology beneficiation method that a kind of copper converter slag reclaims copper; This beneficiation method also is to utilize high, the good toughness of the bright copper hardness of particle in the copper converter slag, and difficult broken difficult mill is with the more crisp breakable physical property difference of non-copper mineral character; Through increasing sieving technology; The bright copper of coarse grain in the vessel slag is reclaimed in advance, the flotation through routine again, scan and obtain remaining copper concentrate, significantly improved product quality; Practice thrift energy resource consumption, improved production efficiency.

The present invention includes following step:

(1) raw ore slag particle degree is crushed to-15mm, gets into filler bin;

(2) the slag powder is transported to into ball mill mog through belt :-0.074 occupation rate 65%; The ball mill ore discharge gets into sieve classification, and through regrading ,+2mm oversize particle level product returns ball mill as sand return and regrinds; Under-2mm the sieve ,+0.1mm oversize particle level product can be directly as the copper concentrate product;

(3)-and 0.1mm undersize level product entering tank diameter, former slag per ton adds medicament: butyl xanthate 200 grams, No. 2 oil (terpenic oil) 45 grams, the entering flotation of sizing mixing is roughly selected the stage for the first time;

(4) roughly select for the first time ore pulp after the choosing through cyclone classification, the cyclone sand setting gets into secondary grinding, grinding rate again :-0.043 occupation rate 75%, and the secondary grinding ore discharge is squeezed into cyclone; The cyclone overflow is added medicament by former slag per ton: butyl xanthate 100 grams, No. 2 oil (terpenic oil) 30 grams, and size mixing to get into and roughly select for the second time;

(5) roughly select the back ore pulp for the second time and add medicament butyl xanthate 80 grams, No. 2 oil (terpenic oil) 30 grams, size mixing to get into and roughly select for the third time by former slag per ton; Ore pulp after roughly selecting for the third time gets into and scans by former slag interpolation medicament butyl xanthate 60 grams per ton, No. 2 oil 20 grams;

(6) scan the cyclone that foam turns back to the front, the ore pulp after scanning is stored up through thickening filtration as true tailings, sells to the cement plant as batching;

(7)-2mm sieve down ,+0.1mm oversize particle level product and flotation three times roughly select foam merge through concentrating, filtration is final copper concentrate product.

The present invention compared with prior art through increasing sieving technology, reclaims the bright copper of coarse grain in the vessel slag in advance; Flotation through routine again, scan and obtain remaining copper concentrate, significantly reduced production cost, improved production efficiency; Practice thrift the energy, increased the comprehensive concentrate grade of ore dressing copper.

The (4) description of drawings:

Fig. 1 is a process flow diagram of the present invention.

The (5) specific embodiment

(1) particle size reduction with 1 ton of former slag arrives-15mm, gets into filler bin;

(2) the slag powder is transported to into ball mill mog through belt :-0.074 occupation rate 65%; The ball mill ore discharge gets into sieve classification, and through regrading ,+2mm oversize particle level product returns ball mill as sand return and regrinds; Under-2mm the sieve ,+0.1mm oversize particle level product can be directly as the copper concentrate product;

(3)-and 0.1mm undersize level product entering tank diameter, former slag per ton adds medicament: butyl xanthate 200 grams, No. 2 oil 45 grams, the entering flotation of sizing mixing is roughly selected the stage for the first time;

(4) roughly select for the first time ore pulp after the choosing through cyclone classification, the cyclone sand setting gets into secondary grinding, grinding rate again :-0.043 occupation rate 75%, and the secondary grinding ore discharge is squeezed into cyclone; The cyclone overflow is added medicament by former slag per ton: butyl xanthate 100 grams, No. 2 oil 30 grams, and size mixing to get into and roughly select for the second time;

(5) roughly select the back ore pulp for the second time and add medicament butyl xanthate 80 grams, No. 2 oil 30 grams, size mixing to get into and roughly select for the third time by former slag per ton; Ore pulp after roughly selecting for the third time gets into and scans by former slag interpolation medicament butyl xanthate 60 grams per ton, No. 2 oil 20 grams;

(6) scan the cyclone that foam turns back to the front, the ore pulp after scanning is stored up through thickening filtration as true tailings, sells to the cement plant as batching;

(7)-2mm sieve down ,+0.1mm oversize particle level product and flotation three times roughly select foam merge through concentrating, filtration is final copper concentrate product.Comprehensively select copper recovery 96.94%, copper concentrate grade 30.19%.

Finally obtain the copper concentrate product of concentrate grade 30.19% in the present embodiment, improve than prior art and select 2.19 percentage points of copper concentrate grades.By handling 200,000 tons of vessel slags every year, vessel slag grade 8% selects copper recovery 96.94% to calculate, 15510 tons of annual production of copper tenors, and 1 percentage point of the every increase of concentrate grade, concentrate price copper content per ton increases by 100 yuan, and then year increase benefit is 310.2 ten thousand yuan.

Claims (1)

1. the copper converter slag reclaims screening, the joint flotation technology beneficiation method of copper, it is characterized in that comprising the steps:

(1) raw ore slag particle degree is crushed to-15mm, gets into filler bin;

(2) the slag powder is transported to into ball mill mog through belt :-0.074 occupation rate 65%; The ball mill ore discharge gets into sieve classification, and through regrading ,+2mm oversize particle level product returns ball mill as sand return and regrinds; Under-2mm the sieve ,+0.1mm oversize particle level product can be directly as the copper concentrate product;

(3)-and 0.1mm undersize level product entering tank diameter, former slag per ton adds medicament: butyl xanthate 200 grams, No. 2 oil 45 grams, the entering flotation of sizing mixing is roughly selected the stage for the first time;

(4) roughly select for the first time ore pulp after the choosing through cyclone classification, the cyclone sand setting gets into secondary grinding, grinding rate again :-0.043 occupation rate 75%, and the secondary grinding ore discharge is squeezed into cyclone; The cyclone overflow is added medicament by former slag per ton: butyl xanthate 100 grams, No. 2 oil 30 grams, and size mixing to get into and roughly select for the second time;

(5) roughly select the back ore pulp for the second time and add medicament butyl xanthate 80 grams, No. 2 oil 30 grams, size mixing to get into and roughly select for the third time by former slag per ton; Ore pulp after roughly selecting for the third time gets into and scans by former slag interpolation medicament butyl xanthate 60 grams per ton, No. 2 oil 20 grams;

(6) scan the cyclone that foam turns back to the front, the ore pulp after scanning is stored up through thickening filtration as true tailings, sells to the cement plant as batching;

(7)-2mm sieve down ,+0.1mm oversize particle level product and flotation three times roughly select foam merge through concentrating, filtration is final copper concentrate product.

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