CN107626435A

CN107626435A - The recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt

Info

Publication number: CN107626435A
Application number: CN201710847534.1A
Authority: CN
Inventors: 钟义; 程伊金; 胡承凡; 韦东; 朱江; 张亚朋; 龙朝晖; 毛少波; 陈永彬; 黄春源
Original assignee: Wugang Resources Group Co Ltd
Current assignee: Daye iron ore Co., Ltd. of WISCO Resources Group
Priority date: 2017-09-19
Filing date: 2017-09-19
Publication date: 2018-01-26
Anticipated expiration: 2037-09-19
Also published as: CN107626435B

Abstract

The invention discloses the recovery process of a kind of low-grade silver of skarn type copper-containing magnetite association and cobalt, comprise the following steps：1) skarn type copper-containing magnetite is subjected to bulk flotation, obtains copper-sulfide mixed concentrate；2) it is copper-sulfide mixed concentrate is levigate, to improve the degree of dissociation of silver, cobalt carrier mineral；3) the high-copper copper concentrate product of silver content ＞ 20g/t high silver content is first obtained using partial-selectivity flotation technique, low the copper copper concentrate and iron concentrate of low silver content are obtained using separating flotation technique again, realizes enriching and recovering silver-colored in shallow crust structures flotation；4) by after iron concentrate iron removaling, you can obtain cobalt content ＞ 0.28% cobalt iron concentrate product.Present invention obtains the cobalt iron concentrate product that high-copper copper concentrate product of the silver content higher than 20g/t and cobalt content are higher than 0.28%, the recovery of skarn type copper-containing magnetite middle-low grade associated silver and cobalt is realized, greatly improves the economic benefit of ore resource.

Description

The recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt

Technical field

The present invention relates to mine ore dressing technology, in particular to a kind of low-grade silver of skarn type copper-containing magnetite association and cobalt Recovery process.

Background technology

Copper sulfide ore is one of main Types of Copper Ores, uses the ore-dressing technique based on floatation, is generally had preferential Flotation flowsheet, mixing-separating flotation flow, half preferential-mixing-separating flotation flow, mud-sand separation flow and selecting smelting combination etc. Technological process.

Da Ye Iron Mine is a large-scale contact metasomatism skarn type copper-containing magnetite mineral deposit, in addition to main metallic iron, is also associated with The valuable components such as copper, gold, silver, cobalt and sulphur.Using the technique of bulk flotation-shallow crust structures-floating tail magnetic separation, bulk flotation is with lead ethyl xanthate For medicine as copper, the collecting agent of sulfur mineral, 11# oil is foaming agent, sweeps two smart flows through one thick two, draws copper-sulfide mixed concentrate, is mixed Shallow crust structures flotation is carried out again after closing the concentrated machine of concentrate (reagent removal) concentration.Separating flotation is used as pH regulators, Z-200 using lime As the collecting agent of copper mineral, two smart flows are swept through one thick three under the conditions of high-alkali, obtain copper concentrate and cobalt iron concentrate, gold, silver It is enriched in copper concentrate, cobalt is enriched in iron concentrate.However, in existing copper, sulphur content from (one thick three sweeps two essences) technological process Under, copper concentrate 15~16g/t of argentiferous of mineral processing production, iron concentrate is less than 0.2% containing cobalt, can not valuate during production marketing, resource Benefit is not fully exerted.

The content of the invention

Present invention aim to provide the recovery work of a kind of low-grade silver of skarn type copper-containing magnetite association and cobalt Skill, the technique can reclaim the low-grade silver of association in skarn type copper-containing magnetite and cobalt, lifting ore economy of resources.

To achieve the above object, the technical solution adopted by the present invention is：A kind of low product of skarn type copper-containing magnetite association The recovery process of position silver and cobalt, comprises the following steps：

1) skarn type copper-containing magnetite is subjected to bulk flotation, obtains copper-sulfide mixed concentrate；

2) it is the copper-sulfide mixed concentrate is levigate, to improve the degree of dissociation of silver, cobalt carrier mineral；

3) the high-copper copper concentrate product of silver content ＞ 20g/t high silver content is first obtained using partial-selectivity flotation technique, Low the copper copper concentrate and iron concentrate of low silver content are obtained using separating flotation technique again, realizes enrichment silver-colored in shallow crust structures flotation Recovery；

4) by after the iron concentrate iron removaling, you can obtain cobalt content ＞ 0.28% cobalt iron concentrate product.

Further, in the step 1), the copper-sulfide mixed concentrate is purified, reduces sludge impurity, to improve The copper-sulfide mixed concentrate grade.

Further, in the step 1), the copper-sulfide mixed concentrate is swept into row using primary cleaning and once essence and carried Pure, collecting agent is MB xanthate, and foaming agent is 11# oil；Then reagent removal is carried out to the copper-sulfide mixed concentrate after purification.

Further, in the step 2), after levigate, the particle of the copper-sulfide mixed concentrate particle diameter ＜ 0.075mm reaches More than 95%.

Further, it is excellent using one roughing and triple cleaning in the partial-selectivity flotation technique in the step 3) First flotation.

Further, in the step 3), in the separating flotation technique, scanned using one roughing, four times and twice Selected separating flotation.

Further, in the step 3), in the separating flotation technique, swept using one roughing, four essences and twice Selected separating flotation；Selective copper collector is Mos-2.

Further, in the step 4), the iron concentrate is subjected to one section of low intensity magnetic separation iron removaling, magnetic field intensity 100mT.

Further, in the step 2), after levigate, particle diameter ＜ 0.043mm particle in the copper-sulfide mixed concentrate Up to more than 80%.

Compared with prior art, the present invention has advantages below：

First, present invention obtains high-copper copper concentrate product of the silver content higher than 20g/t and cobalt content higher than 0.28% Cobalt iron concentrate product, the recovery of skarn type copper-containing magnetite middle-low grade associated silver and cobalt is realized, greatly improves ore The economic benefit of resource.

Second, the present invention, which solves the problems, such as that the copper sulphur that existing bulk flotation technique obtains mixes, easily carries sludge secretly in concentrate, Advantage is provided for later separation flotation operation.

One thick two two smart separating technology flows are swept in the prior art third, improving, using partly preferential-separating flotation technique (two thick four sweep three smart, excellent floating smart tails merges technological process selected twice with the essence of roughing II), it greatly improved in copper concentrate Cobalt grade in silver-colored grade and iron concentrate；New floating agent MB xanthate and Mos-2 combination in addition, enhances and Au, Ag is selected Property collecting；Copper-sulfide mixed concentrate liberation degree of minerals is high in the present invention, diffeential floatation is selectively good, separating flotation Technological adaptability By force.

Embodiment

With reference to specific embodiment, the present invention is described in further detail, is easy to more clearly understand the present invention, But they do not form to the present invention and limited.

Embodiment 1

The recovery process step of the low-grade silver of skarn type copper-containing magnetite association and cobalt is as follows：The copper that bulk flotation obtains Using primary cleaning, once essence sweeps operation purification to sulfide mixed concentrate, to improve bulk concentrate grade, wherein, collecting agent is MB yellow Medicine, foaming agent are 11# oil；Copper-sulfide mixed concentrate after purification is regrinded after reagent removal, then grinding rate reach- More than 0.075mm95% (or -0.043mm80%), to improve the degree of dissociation of silver, cobalt carrier mineral；Shallow crust structures use part Preferentially-separating flotation technique, i.e.,：First a thick three smart diffeential floatation obtains argentiferous grade and produced up to more than 20g/t high-copper copper concentrate Product, another thick four, which sweep two smart separating flotations, obtains relatively low low the copper copper concentrate and iron concentrate of argentiferous, wherein, selective copper collector is Mos-2；The iron concentrate of separating flotation magnetic field intensity 100mT, is more than through one section of low intensity magnetic separation iron removaling so as to can obtain cobalt content 0.28% cobalt iron concentrate product.

Empirical tests, it is 19.65% that separating flotation, which obtains high-copper copper concentrate yield, copper grade 25.29%, argentiferous 20.94g/ T, copper, silver raising recovery rate are respectively 67.51%, 51.43%；Low copper copper concentrate yield is 13.18%, copper grade 16.68%, argentiferous 15.34g/t, copper recovery 29.87%.It is 57.43% to separate iron concentrate and obtain high cobalt iron concentrate yield through low intensity magnetic separation, sulphur product Position is 43.02%, and containing cobalt 0.282%, sulphur, the cobalt rate of recovery are respectively 65.28%, 67.48%；Low cobalt iron concentrate yield is 2.71%, sulfur grade 20.27%, sulfur recovery rate 1.45%, containing cobalt 0.137%, iron content 56.88%.

Claims

A kind of 1. recovery process of low-grade silver of skarn type copper-containing magnetite association and cobalt, it is characterised in that：Including following step Suddenly：

1) skarn type copper-containing magnetite is subjected to bulk flotation, obtains copper-sulfide mixed concentrate；

2) it is the copper-sulfide mixed concentrate is levigate, to improve the degree of dissociation of silver, cobalt carrier mineral；

3) the high-copper copper concentrate product of silver content ＞ 20g/t high silver content is first obtained using partial-selectivity flotation technique, then is adopted Low the copper copper concentrate and iron concentrate of low silver content are obtained with separating flotation technique, realizes that enrichment silver-colored in shallow crust structures flotation is returned Receive；

4) by after the iron concentrate iron removaling, you can obtain cobalt content ＞ 0.28% cobalt iron concentrate product.
2. the recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt, its feature exist according to claim 1 In：In the step 1), the copper-sulfide mixed concentrate is purified, reduces sludge impurity, to improve the copper sulphur mixing essence Ore deposit grade.
3. the recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt, its feature exist according to claim 2 In：In the step 1), the copper-sulfide mixed concentrate is swept into capable purification using primary cleaning and once essence, collecting agent is MB yellow Medicine, foaming agent are 11# oil；Then reagent removal is carried out to the copper-sulfide mixed concentrate after purification.
4. according to the 1 or 2 or 3 skarn type copper-containing magnetite association of claim it is low-grade silver and cobalt recovery process, its It is characterised by：In the step 2), after levigate, the particle of the copper-sulfide mixed concentrate particle diameter ＜ 0.075mm is up to more than 95%.
5. according to the 1 or 2 or 3 skarn type copper-containing magnetite association of claim it is low-grade silver and cobalt recovery process, its It is characterised by：In the step 3), in the partial-selectivity flotation technique, using one roughing and triple cleaning diffeential floatation.
6. according to the 1 or 2 or 3 skarn type copper-containing magnetite association of claim it is low-grade silver and cobalt recovery process, its It is characterised by：In the step 3), in the separating flotation technique, scanned using one roughing, four times and selected separation twice Flotation.
7. the recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt, its feature exist according to claim 5 In：In the step 3), in the separating flotation technique, swept using one roughing, four essences and selected separating flotation twice；Choosing Selecting property collecting agent is Mos-2.
8. according to the 1 or 2 or 3 skarn type copper-containing magnetite association of claim it is low-grade silver and cobalt recovery process, its It is characterised by：In the step 4), the iron concentrate is subjected to one section of low intensity magnetic separation iron removaling, magnetic field intensity 100mT.
9. the recovery process of the low-grade silver of skarn type copper-containing magnetite association and cobalt, its feature exist according to claim 4 In：In the step 2), after levigate, particle diameter ＜ 0.043mm particle is up to more than 80% in the copper-sulfide mixed concentrate.