CN103157558A - Beneficiation method of recovering sulfur from copper sulfide ore flotation tailings - Google Patents

Abstract

The invention belongs to the field of mineral processing, relates to a beneficiation method, and particularly relates to a method of sorting copper sulfide ore flotation tailings. The method comprises the following steps: A, the tailings with copper and sulfur separated are dewatered through a thickener, wherein the content of the sulfur in the tailings is more than 20%, and the concentration of the tailings is 10-15%, and after the tailings are dewatered, the concentration of a bottom current is improved to 20-25%; B, the bottom current of the A step enters a whirlcone to grade, and the concentration of sinking sand of the whirlcone is improved to 30-40%, the whirlcone overflows, the concentration of the tailings is 10%, the content of the sulfur is 15%, the tailings are discharged to a tailings pond or are concentrated back to the step A; and C, the concentration of the sinking sand in the step B is 30-40%, the content of the sulfur is 25-35%, the sinking sand enters to a flotation system, acid is added in the sinking sand and are mixed with a pH value of 6.5-7.5, after flotation reagents are added, final sulfur concentrate is obtained after one-time rough concentration, one-time scavenging and two-time choiceness. Compared with the prior technology, the beneficiation method of recovering the sulfur from the copper sulfide ore flotation tailings has the advantages of being stable in technological process, small in dosage of sulfuric acid and high in grade of sulfur concentrate and recovery rate.

Description

A kind of copper-sulphide ores flotation tailing reclaims the beneficiation method of sulphur

 

Technical field

The invention belongs to the mineral manufacture field, relate to a kind of beneficiation method, especially a kind of method that the copper-sulphide ores flotation tailing is sorted.

 

Background technology

Sulfuric acid is one of staple product in basic chemical industry, is widely used in other sector of the national economy.And the primary raw material of producing sulfuric acid has: troilite, sulphur and flue gas during smelting.Along with the development of national economy, market increases day by day to the demand of sulfuric acid.Improve the comprehensive recovery of ferro-sulphur ore, increase sulfuric acid raw material sources amount, China's economic development is had important function.

Copper sulphur content is from generally carrying out in strongly basic medium, and a large amount of lime forms high-alkali high calcium ambient condition, and pyrite is suppressed.For making the pyrite activation, copper is scanned mine tailing and is selected general employing of sulphur technique to add acid flotation process, and acid activation technique exists acid mist pollution, etching problem and potential hazards.Separately have adopt gravity treatment after HQS heavy medium cyclone-flotation column process integration, first magnetic separation again flotation technique, by the reasonable disposition hydrocyclone, the copper mine tailing is carried out desliming reagent removal technique, realize that the sulphur resource reclaims.Above technique or have the problem of acid mist pollution or have the not high problem of sulfur recovery rate.

 

Summary of the invention

The present invention is directed to copper sulphur content from mine tailing adopt concentrated after flotation select sulphur technique, be conducive to reduce the sulfuric acid consumption, be conducive to that flotation is upgrade and the rate of recovery.

The present invention is achieved through the following technical solutions: copper sulphur content from mine tailing adopt concentrator reagent removal and dehydration, after underflow enters cyclone classification, enter flotation and select the sulphur system, through one roughing, once purging selection, the twice selected sulphur concentrate of final grade more than 47% that obtain.

It is characterized in that through following process steps:

A, copper sulphur content from mine tailing adopt the concentrator dehydration, the mine tailing sulfur-bearing is more than 20%, tailings concentration 10-15%, after the concentrator dehydration, underflow density is brought up to 20-25%;

The underflow of B, A step enters cyclone classification, and hydrocyclone sand concentration is brought up to 30-40%; The cyclone overflow, concentration 10%, sulfur-bearing 15% abandons to Tailings Dam or to return to the A step concentrated;

The sand setting of C, step, concentration 30-40%, sulfur-bearing 25-35% enters floatation system, and acid adding is sized mixing to pH value 6.5-7.5, adds floating agent and obtains final sulphur concentrate through one roughing, once purging selection, twice are selected;

Wherein, the medicament that the C step adds is adjusting agent dilute sulfuric acid (concentration 10-20%) 50-300g/t, collecting agent xanthate 45-60 g/t, foaming agent 111# or other 2# wet goods ether alcohol class 8-12 g/t.

The present invention and existing technique ratio, have advantages of that technological process is stable, the sulfuric acid consumption is few, the sulphur concentrate grade and the rate of recovery high.

 

The specific embodiment

Jiangxi Copper company Dexing copper mine dashan concentrator production capacity is 9.2 ten thousand t/d.The copper flotation tailing selects sulphur, selects the sulphur operation to adopt hydrocyclone, and output and concentrate grade can not satisfy the needs of relieving haperacidity.

1, the configuration of sulphur system equipment is selected in flotation: select 10 70m ³Pneumatic flotation cell selects sulphur.Select 2 groups of φ 420mm * 10 cyclone classification equipment.Select 3 12/10ST-AH slag stock pumps, use 1 φ 45m concentrator.

2, flotation flowsheet: copper sulphur content from mine tailing adopt concentrator reagent removal and dehydration, after underflow enters cyclone classification, sand setting enters flotation and selects the sulphur system, overflow also can enter flotation and select the sulphur system after thickener washing and reagent removal, pass through that one roughing, once purging selection, twice are selected obtains final sulphur concentrate.Be provided with acid adding surge tank, flotation dosing and pH and detect groove before sulphur is roughly selected, the acid adding surge tank has the effect of sizing mixing with the ore pulp buffering simultaneously.

3, production effect:

It is as shown in the table for 3-12 month production economy technical indicator in 2012:

Claims (1)

1. a copper-sulphide ores flotation tailing reclaims the beneficiation method of sulphur, it is characterized in that through following process steps:

A, copper sulphur content from mine tailing adopt the concentrator dehydration, the mine tailing sulfur-bearing is more than 20%, tailings concentration 10-15%, after the concentrator dehydration, underflow density is brought up to 20-25%;

The underflow of B, A step enters cyclone classification, and hydrocyclone sand concentration is brought up to 30-40%; The cyclone overflow, concentration 10%, sulfur-bearing 15% abandons to Tailings Dam or to return to the A step concentrated;

The sand setting of C, step, concentration 30-40%, sulfur-bearing 25-35% enters floatation system, and acid adding is sized mixing to pH value 6.5-7.5, adds floating agent and obtains final sulphur concentrate through one roughing, once purging selection, twice are selected;

Wherein, the medicament that the C step adds is adjusting agent dilute sulfuric acid (concentration 10-20%) 50-300g/t, collecting agent xanthate 45-60 g/t, foaming agent 111# or other 2# wet goods ether alcohol class 8-12 g/t.