阅读说明：本技术 一种回收复杂氧化铜矿的选冶联合处理方法 (Dressing and smelting combined treatment method for recovering complex copper oxide ore ) 是由 孙忠梅 龙翼 阙朝阳 甘永刚 徐其红 张兴勋 张卿 石仑雷 陈水波 温建 于 2018-07-06 设计创作，主要内容包括：本发明公开了一种回收复杂氧化铜矿的选冶联合处理方法,包括如下步骤：(1)硫化铜浮选流程；(2)脱泥流程；(3)氧化铜浮选流程；(4)磁选流程；(5)湿法炼铜。本发明采用硫、氧铜矿分步浮选工艺,减少的硫化钠对硫化铜的抑制,并获得高品位硫化铜精矿。本发明对含铜5.30％左右的原矿,总铜回收率可达到90％以上,获得技术指标较好。(The invention discloses a dressing-smelting combined treatment method for recovering complex copper oxide ores, which comprises the following steps: (1) copper sulfide flotation process; (2) desliming process; (3) copper oxide flotation process; (4) magnetic separation process; (5) and (4) carrying out wet copper smelting. The invention adopts a step-by-step flotation process of the copper sulphide and the copper oxide ore, reduces the inhibition of sodium sulphide on the copper sulphide and obtains high-grade copper sulphide concentrate. The invention has the advantages that the total copper recovery rate of the raw ore containing about 5.30 percent of copper can reach more than 90 percent, and the obtained technical index is better.)

1. A dressing and smelting combined treatment method for recovering complex copper oxide ores is characterized by comprising the following steps: the method comprises the following steps:

(1) copper sulfide flotation process: the method comprises the following steps:

a. grinding the raw ore to obtain raw ore pulp with the particle size of less than 0.074mm and accounting for 60-65 wt%;

b. adding amyl xanthate and 2# oil into the raw ore pulp, wherein the adding amount is 75-85 g/t and 35-45 g/t respectively, and performing roughing to obtain copper sulfide rough concentrate and copper sulfide rough tailings;

c. adding amyl xanthate and 2# oil into the copper sulfide roughing tailings, wherein the adding amount of the amyl xanthate and the 2# oil is 35-45 g/t and 8-12 g/t respectively, and scavenging to obtain copper sulfide scavenging middlings and copper sulfide scavenging tailings;

d. combining the copper sulfide rough concentrate and copper sulfide scavenging middlings, grinding the mixture to 82-87 wt% of the copper sulfide scavenging middlings with the particle size of less than 0.045mm, and then carrying out 4-stage concentration, wherein each stage of concentration is carried out for 2.5-3.5 min to obtain copper sulfide concentrate, the 1 st stage of concentration is carried out to obtain 1 st stage of copper sulfide concentration middlings, and middlings obtained from 2 nd to 4 th stages of concentration are sequentially returned to the previous stage of concentration flow;

(2) a desliming process: desliming the copper sulfide scavenging tailings by using a cyclone to obtain ore sand and slime;

(3) copper oxide flotation process: the method comprises the following steps:

a. adding 280-320 g/t of sodium fluosilicate into the ore sand obtained in the step (2) for size mixing for 4 min;

b. adding sodium sulfide, pentylxanthate, butylamine black and No. 2 oil, wherein the adding amount of the sodium sulfide, the pentylxanthate, the butylamine black and the No. 2 oil is 2200-2700 g/t, 180-220 g/t, 25-35 g/t and 8-12 g/t respectively, stirring for 1.5-2.5 min, and then carrying out flotation for 1.5-2.5 min to obtain fast-floating concentrate and fast-floating tailings;

c. adding sodium sulfide, amyl xanthate and butylamine black in the fast flotation tailings, wherein the adding amount of the sodium sulfide, amyl xanthate and butylamine black is 900-1100 g/t, 45-55 g/t and 8-12 g/t respectively, stirring for 1.5-2.5 min, and then carrying out flotation for 1.5-2.5 min to obtain first roughed concentrate and first roughed tailings;

d. adding sodium sulfide and amyl xanthate into the first roughed tailings, wherein the adding amount of the sodium sulfide and the amyl xanthate is 450-550 g/t and 25g/t respectively, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain second roughed concentrate and second roughed tailings;

e. combining the fast flotation concentrate, the first rougher concentrate and the second rougher concentrate to obtain a first copper oxide concentrate;

f. adding chemicals into the second roughed tailings for 3 times, wherein sodium sulfide, amyl xanthate and butylamine black powder are added in each chemical adding, and the adding amount is respectively 280-320 g/t, 17-23 g/t and 2-4 g/t in sequence; after adding the chemicals each time, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain first scavenging concentrate and first scavenging tailings;

g. adding the chemical into the first scavenged tailings for 3 times, wherein sodium sulfide and amyl xanthate are added in each chemical adding, and the chemical adding amount is 180-220 g/t and 8-12 g/t respectively; after adding the chemicals each time, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain a second scavenging concentrate and a second scavenging tailing;

h. after combining the first scavenging concentrate, the second scavenging concentrate and the 1 st-grade copper sulfide concentration middlings, adding medicines into the middlings for 2 times for concentration, adding sodium sulfide and amyl xanthate into the first medicine, wherein the medicine adding quantities are respectively 180-220 g/t and 17-23 g/t in sequence, adding sodium sulfide, amyl xanthate and butylamine black medicine into the second medicine, and the medicine adding quantities are respectively 180-220 g/t, 8-12 g/t and 2-4 g/t in sequence; after adding chemicals each time, stirring for 1.5-2.5 min, and then floating for 1.5-2.5 min to obtain a second copper oxide concentrate and concentrated tailings, and returning the concentrated tailings to the scavenging process in the step (3);

(4) magnetic separation process: carrying out magnetic separation on the second scavenging tailings to obtain third copper oxide concentrate and magnetic separation tailings;

(5) and (3) copper smelting by a wet method: and performing wet acid leaching on the second copper oxide concentrate, the third copper oxide concentrate and the slime to recover copper.

2. A dressing and metallurgy combined treatment method according to claim 1, wherein: the step (1) comprises the following steps:

a. grinding the raw ore to obtain raw ore pulp with the particle size of less than 0.074mm and accounting for 60-65 wt%;

b. adding amyl xanthate and 2# oil into the raw ore pulp, wherein the adding amount is 80g/t and 40g/t respectively, and performing roughing to obtain copper sulfide rough concentrate and copper sulfide rough tailings;

c. adding amyl xanthate and 2# oil into the copper sulfide rougher tailings, wherein the adding amount is 40g/t and 10g/t respectively, and scavenging to obtain copper sulfide scavenging middlings and copper sulfide scavenging tailings;

d. and combining the copper sulfide rough concentrate and copper sulfide scavenging middlings, grinding the mixture to 85 wt% with the particle size of less than 0.045mm, and then carrying out 4-stage concentration, wherein each stage of concentration is carried out for 3min to obtain copper sulfide concentrate, the 1 st stage of concentration is carried out to obtain 1 st stage of copper sulfide concentration middlings, and the middlings obtained from the 2 nd to 4 th stages of concentration are returned to the previous stage of concentration in sequence.

3. A dressing and metallurgy combined treatment method according to claim 1, wherein: in the step (2), the type of the cyclone is FX150, and the discharge ratio is 0.76.

4. A dressing and metallurgy combined treatment method according to claim 1, wherein: the step (3) comprises the following steps:

a. adding 300g/t of sodium fluosilicate into the ore sand obtained in the step (2) for size mixing for 4 min;

b. adding sodium sulfide, amyl xanthate, butylamine black powder and No. 2 oil, sequentially adding 2500g/t, 200g/t, 30g/t and 10g/t of chemicals, stirring for 2min, and then performing flotation for 2min to obtain fast-floating concentrate and fast-floating tailings;

c. adding sodium sulfide, amyl xanthate and butylamine black powder into the fast-floating tailings, wherein the adding amount of the sodium sulfide, amyl xanthate and butylamine black powder is respectively 1000g/t, 50g/t and 10g/t in sequence, stirring for 2min, and then selecting for 2min to obtain first roughed concentrate and first roughed tailings;

d. adding sodium sulfide and pentylxanthate into the first roughed tailings, adding 500g/t and 25g/t of chemicals in sequence, stirring for 2min, and then performing flotation for 2min to obtain second roughed concentrate and second roughed tailings;

e. combining the fast flotation concentrate, the first rougher concentrate and the second rougher concentrate to obtain a first copper oxide concentrate;

f. adding the chemicals into the second roughed tailings for 3 times, wherein sodium sulfide, amyl xanthate and butylamine black are added in each chemical adding, and the adding amount is respectively 300g/t, 20g/t and 3g/t in sequence; after adding the chemicals each time, stirring for 2min, and then performing flotation for 2min to obtain first scavenging concentrate and first scavenging tailings;

g. adding the chemicals into the first scavenged tailings for 3 times, wherein sodium sulfide and amyl xanthate are added in each chemical adding, and the addition amounts are respectively 200g/t and 10 g/t; after adding the chemicals each time, stirring for 2min, and then performing flotation for 2min to obtain a second scavenging concentrate and a second scavenging tailing;

h. after combining the first scavenging concentrate, the second scavenging concentrate and the 1 st-grade copper sulfide concentration middlings, adding medicines into the middlings for 2 times for concentration, adding sodium sulfide and amyl xanthate into the first medicine, wherein the adding medicines are respectively 200g/t and 20g/t in sequence, adding sodium sulfide, amyl xanthate and butylamine black medicine into the second medicine, and the adding medicines are respectively 200g/t, 10g/t and 3g/t in sequence; and (4) after adding chemicals each time, stirring for 2min, performing flotation for 2 times, performing flotation for 2min each time, obtaining a second copper oxide concentrate and concentrated tailings, and returning the concentrated tailings to the scavenging process in the step (3).

5. A dressing and metallurgy combined treatment method according to claim 1, wherein: in the step (4), the magnetic field intensity of the magnetic separation is 1.55T.

6. A dressing and smelting combined treatment process according to any one of claims 1 to 5, characterized in that: the raw ore contains 5.2-5.4% of copper and 0.35-0.45% of sulfur.

Technical Field

The invention belongs to the technical field of dressing and smelting, and particularly relates to a dressing and smelting combined treatment method for recovering complex copper oxide ores.

Background

Along with the continuous development of national economy, the development and utilization of copper ore resources, the development and utilization of easily-treated copper ore resources, particularly the continuous reduction of easily-treated copper sulfide ores, the copper oxide ores gradually become important objects for development and utilization.

The development and utilization difficulty of the copper oxide ore is high, and the problem of low recovery utilization rate always exists. The copper oxide ore treatment has different treatment methods due to the difference of components, and the industrial copper oxide ore treatment mainly adopts a flotation method. However, the copper oxide ores are of various types, have the characteristics of high oxidation rate and binding rate, fine mineral granularity, uneven embedded distribution, strong hydrophilicity and high mud content, and are accompanied by a plurality of useful components, so the difficulty of copper oxide ore flotation is increased to a certain extent, and complex copper oxide ores are difficult to efficiently recover by single flotation. In order to comprehensively utilize the copper ore resources, researchers gradually find out a plurality of new ways for development and utilization, such as leaching, separation and combined treatment. The optimal treatment process of the copper oxide ores with different properties is different. Therefore, aiming at the characteristics of the copper oxide ore, the search for a proper treatment process is necessary, and the method has important significance for improving the recovery of the copper oxide ore and reducing the treatment cost.

Disclosure of Invention

The invention aims to provide a dressing and smelting combined treatment method for recovering complex copper oxide ores.

The technical scheme of the invention is as follows:

a dressing and smelting combined treatment method for recovering complex copper oxide ores comprises the following steps:

(1) copper sulfide flotation process: the method comprises the following steps:

a. grinding the raw ore to obtain raw ore pulp with the particle size of less than 0.074mm and accounting for 60-65 wt%;

b. adding amyl xanthate and 2# oil into the raw ore pulp, wherein the adding amount is 75-85 g/t and 35-45 g/t respectively, and performing roughing to obtain copper sulfide rough concentrate and copper sulfide rough tailings;

c. adding amyl xanthate and 2# oil into the copper sulfide roughing tailings, wherein the adding amount of the amyl xanthate and the 2# oil is 35-45 g/t and 8-12 g/t respectively, and scavenging to obtain copper sulfide scavenging middlings and copper sulfide scavenging tailings;

d. combining the copper sulfide rough concentrate and copper sulfide scavenging middlings, grinding the mixture to 82-87 wt% of the copper sulfide scavenging middlings with the particle size of less than 0.045mm, and then carrying out 4-stage concentration, wherein each stage of concentration is carried out for 2.5-3.5 min to obtain copper sulfide concentrate, the 1 st stage of concentration is carried out to obtain 1 st stage of copper sulfide concentration middlings, and middlings obtained from 2 nd to 4 th stages of concentration are sequentially returned to the previous stage of concentration flow;

(2) a desliming process: desliming the copper sulfide scavenging tailings by using a cyclone to obtain ore sand and slime;

(3) copper oxide flotation process: the method comprises the following steps:

a. adding 280-320 g/t of sodium fluosilicate into the ore sand obtained in the step (2) for size mixing for 4 min;

b. adding sodium sulfide, pentylxanthate, butylamine black and No. 2 oil, wherein the adding amount of the sodium sulfide, the pentylxanthate, the butylamine black and the No. 2 oil is 2200-2700 g/t, 180-220 g/t, 25-35 g/t and 8-12 g/t respectively, stirring for 1.5-2.5 min, and then carrying out flotation for 1.5-2.5 min to obtain fast-floating concentrate and fast-floating tailings;

c. adding sodium sulfide, amyl xanthate and butylamine black in the fast flotation tailings, wherein the adding amount of the sodium sulfide, amyl xanthate and butylamine black is 900-1100 g/t, 45-55 g/t and 8-12 g/t respectively, stirring for 1.5-2.5 min, and then carrying out flotation for 1.5-2.5 min to obtain first roughed concentrate and first roughed tailings;

d. adding sodium sulfide and amyl xanthate into the first roughed tailings, wherein the adding amount of the sodium sulfide and the amyl xanthate is 450-550 g/t and 25g/t respectively, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain second roughed concentrate and second roughed tailings;

e. combining the fast flotation concentrate, the first rougher concentrate and the second rougher concentrate to obtain a first copper oxide concentrate;

f. adding chemicals into the second roughed tailings for 3 times, wherein sodium sulfide, amyl xanthate and butylamine black powder are added in each chemical adding, and the adding amount is respectively 280-320 g/t, 17-23 g/t and 2-4 g/t in sequence; after adding the chemicals each time, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain first scavenging concentrate and first scavenging tailings;

g. adding chemicals into the first scavenged tailings for 3 times, wherein sodium sulfide and amyl xanthate are added in each chemical adding, and the adding amount is 180-220 g/t and 8-12 g/t respectively; after adding the chemicals each time, stirring for 1.5-2.5 min, and then performing flotation for 1.5-2.5 min to obtain a second scavenging concentrate and a second scavenging tailing;

h. after combining the first scavenging concentrate, the second scavenging concentrate and the 1 st-grade copper sulfide concentration middlings, adding medicines into the middlings for 2 times for concentration, adding sodium sulfide and amyl xanthate into the first medicine, wherein the medicine adding quantities are respectively 180-220 g/t and 17-23 g/t in sequence, adding sodium sulfide, amyl xanthate and butylamine black medicine into the second medicine, and the medicine adding quantities are respectively 180-220 g/t, 8-12 g/t and 2-4 g/t in sequence; after adding chemicals each time, stirring for 1.5-2.5 min, and then floating for 1.5-2.5 min to obtain a second copper oxide concentrate and concentrated tailings, and returning the concentrated tailings to the scavenging process in the step (3);

(4) magnetic separation process: carrying out magnetic separation on the second scavenging tailings to obtain third copper oxide concentrate and magnetic separation tailings;

(5) and (3) copper smelting by a wet method: and performing wet acid leaching on the second copper oxide concentrate, the third copper oxide concentrate and the slime to recover copper.

In a preferred embodiment of the present invention, the step (1) comprises the steps of:

a. grinding the raw ore to obtain raw ore pulp with the particle size of less than 0.074mm and accounting for 60-65 wt%;

b. adding amyl xanthate and 2# oil into the raw ore pulp, wherein the adding amount is 80g/t and 40g/t respectively, and performing roughing to obtain copper sulfide rough concentrate and copper sulfide rough tailings;

c. adding amyl xanthate and 2# oil into the copper sulfide rougher tailings, wherein the adding amount is 40g/t and 10g/t respectively, and scavenging to obtain copper sulfide scavenging middlings and copper sulfide scavenging tailings;

d. and combining the copper sulfide rough concentrate and copper sulfide scavenging middlings, grinding the mixture until the particle size of the copper sulfide rough concentrate is less than 0.045mm and the copper sulfide scavenging middlings account for 85 wt%, then carrying out 4-stage concentration, wherein each stage of concentration is carried out for 3min to obtain copper sulfide concentrate, the 1 st stage of concentration is carried out to obtain 1 st-stage copper sulfide concentration middlings, and the middlings obtained from the 2 nd to 4 th stages of concentration are returned to the previous stage of concentration in sequence.

In a preferred embodiment of the present invention, in the step (2), the type of the cyclone is FX150, and the discharge ratio is 0.76.

In a preferred embodiment of the present invention, the step (3) comprises the steps of:

a. adding 300g/t of sodium fluosilicate into the ore sand obtained in the step (2) for size mixing for 4 min;

b. adding sodium sulfide, amyl xanthate, butylamine black powder and No. 2 oil, sequentially adding 2500g/t, 200g/t, 30g/t and 10g/t of chemicals, stirring for 2min, and then performing flotation for 2min to obtain fast-floating concentrate and fast-floating tailings;

c. adding sodium sulfide, amyl xanthate and butylamine black powder into the fast-floating tailings, wherein the adding amount of the sodium sulfide, amyl xanthate and butylamine black powder is respectively 1000g/t, 50g/t and 10g/t in sequence, stirring for 2min, and then carrying out flotation for 2min to obtain first roughed concentrate and first roughed tailings;

d. adding sodium sulfide and pentylxanthate into the first roughed tailings, adding 500g/t and 25g/t of chemicals in sequence, stirring for 2min, and then performing flotation for 2min to obtain second roughed concentrate and second roughed tailings;

e. combining the fast flotation concentrate, the first rougher concentrate and the second rougher concentrate to obtain a first copper oxide concentrate;

f. adding the chemicals into the second roughed tailings for 3 times, wherein sodium sulfide, amyl xanthate and butylamine black are added in each chemical adding, and the adding amount is respectively 300g/t, 20g/t and 3g/t in sequence; after adding the chemicals each time, stirring for 2min, and then performing flotation for 2min to obtain first scavenging concentrate and first scavenging tailings;

g. adding the chemicals into the first scavenged tailings for 3 times, wherein sodium sulfide and amyl xanthate are added in each chemical adding, and the addition amounts are respectively 200g/t and 10 g/t; after adding the chemicals each time, stirring for 2min, and then performing flotation for 2min to obtain a second scavenging concentrate and a second scavenging tailing;

h. after combining the first scavenging concentrate, the second scavenging concentrate and the 1 st-grade copper sulfide concentration middlings, adding medicines into the middlings for 2 times for concentration, adding sodium sulfide and amyl xanthate into the first medicine, wherein the adding medicines are respectively 200g/t and 20g/t in sequence, adding sodium sulfide, amyl xanthate and butylamine black medicine into the second medicine, and the adding medicines are respectively 200g/t, 10g/t and 3g/t in sequence; and (4) after adding chemicals each time, stirring for 2min, performing flotation for 2 times, performing flotation for 2min each time, obtaining a second copper oxide concentrate and concentrated tailings, and returning the concentrated tailings to the scavenging process in the step (3).

In a preferred embodiment of the present invention, in the step (4), the magnetic field strength of the magnetic separation is 1.55T.

Further preferably, the copper content in the raw ore is 5.2-5.4%, and the sulfur content is 0.35-0.45%.

The invention has the beneficial effects that:

1. the invention adopts a step-by-step flotation process of the copper sulphide and the copper oxide ore, reduces the inhibition of sodium sulphide on the copper sulphide and obtains high-grade copper sulphide concentrate.

2. The invention carries out desliming before the copper oxide flotation, and reduces the adverse effect of slime on the copper oxide flotation.

3. Because the copper sulfide film generated after the surface of the copper oxide mineral is vulcanized is unstable, the groove falling in the concentration process is serious, the concentration operation is not suitable for multiple times, and the concentrate needs to adopt the principle of early harvesting and fast harvesting. Therefore, the high-grade first copper oxide concentrate is obtained by sectional dosing and fast flotation after desliming, the low-grade second copper oxide concentrate is obtained by sectional dosing for one-time concentration of other middlings, the concentration times of the whole copper oxide ore flotation process are reduced, and the copper oxide concentration is prevented from falling out of the tank.

4. The flotation tailings of the invention contain copper oxide ore which is strong in hydrophilicity, difficult to float and weak in magnetism, and the experiment adopts strong magnetic separation to recover and obtain third copper oxide concentrate, so that the copper loss of the tailings is reduced.

5. The invention recovers copper from low-grade second copper oxide concentrate, third copper oxide concentrate and slime by wet acid leaching.

6. The invention has the advantages that the total copper recovery rate of the raw ore containing about 5.30 percent of copper can reach more than 90 percent, and the obtained technical index is better.

Drawings

FIG. 1 is a flow chart of an embodiment of the present invention.

FIG. 2 is a flow chart of a specific process of the present invention.

Detailed Description

The technical solution of the present invention will be further illustrated and described below with reference to the accompanying drawings by means of specific embodiments.