阅读说明：本技术 一种铁共生有色金属铜铅锌综合回收工艺 (Comprehensive recovery process for iron symbiotic nonferrous metal copper, lead and zinc ) 是由 王李鹏 任琳珠 郭海宁 何海涛 陈杜娟 李国栋 刘宝山 于 2020-11-10 设计创作，主要内容包括：一种铁共生有色金属铜铅锌综合回收工艺,包括中弱活化弱捕收铜铅锌混浮、强脱药低浓度铜与铅锌分离、小冲程大冲次微细泥摇床分离铅、锌矿物。借助选铁后铜铅锌矿物的疏水性,实现铜铅锌弱活化弱捕收全混选,节约了药剂成本,避免了传统工艺的强活化强捕收导致铜与铅锌分离技术指标差、精矿互含高等问题；铜与铅锌分离采用低浓度、强脱药,在稀硫酸和焦亚硫酸清洗活化的基础上,利用铜矿物自然可浮性,实现铜与铅锌矿物分离；铅锌精矿采用微细泥摇床,小冲程大冲次无冲洗水强化微细粒级铅锌矿物的分选过程,获得了单一的铅精矿、锌精矿,解决了铁共生铜铅锌分选无法获得单一铅精矿、锌精矿,且分选效率低,精矿互含高,精矿价值低等问题。(A comprehensive recovery process for copper, lead and zinc in iron-symbiotic nonferrous metals comprises medium-weak activation and weak collection of copper, lead and zinc mixed flotation, strong removal of chemicals, low-concentration copper and lead and zinc separation, and small-stroke large-stroke fine mud shaking table separation of lead and zinc minerals. By means of the hydrophobicity of the copper-lead-zinc mineral after iron separation, the full mixed separation of weak activation and weak collection of copper-lead-zinc is realized, the medicament cost is saved, and the problems of poor copper-lead-zinc separation technical index, high concentrate content and the like caused by strong activation and strong collection of the traditional process are solved; the separation of copper from lead and zinc adopts low-concentration and strong removal of chemicals, and realizes the separation of copper from lead and zinc minerals by utilizing the natural floatability of copper minerals on the basis of cleaning and activating by dilute sulfuric acid and pyrosulfurous acid; the lead-zinc concentrate adopts a fine mud shaking table, the separation process of fine-particle-level lead-zinc minerals is strengthened without washing water in a small stroke and a large stroke, single lead concentrate and single zinc concentrate are obtained, and the problems that single lead concentrate and single zinc concentrate cannot be obtained in the process of separating copper, lead and zinc in the presence of iron, the separation efficiency is low, the mutual content of the concentrates is high, the concentrate value is low and the like are solved.)

1. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc is characterized by comprising the following steps:

step 1, adding lime into iron ore tailings pulp to adjust the pH value of the pulp to 10, then finely grinding the pulp by using a ball mill, adding 20-30 g of copper sulfate per ton of raw ore, 10-20 g of butyl xanthate per ton of raw ore and 20-30 g of pine oil per ton of raw ore, stirring, and then carrying out copper-lead-zinc mixed rough concentration to obtain copper-lead-zinc mixed rough concentrate, adding lime into the copper-lead-zinc mixed rough concentrate to reach the pH value of 12, and then carrying out copper-lead-zinc mixed fine concentration to obtain copper-lead-zinc concentrate pulp;

step 2, adding 50-100 g/ton of active carbon and 50-100 g/ton of sodium sulfide into the copper-lead-zinc ore concentrate pulp obtained in the step 1, grinding the copper-lead-zinc ore concentrate pulp, adding sodium metabisulfite and dilute sulfuric acid into the ground pulp, stirring the mixture for 5 minutes to ensure that the pH value of the pulp is 6-6.5, the adding ratio of the sodium metabisulfite to the dilute sulfuric acid is 2:1, the concentration of the copper-lead-zinc separation pulp is 15-20%, and the concentration of the copper-copper concentration pulp is 10-15%; carrying out concentration on the copper rough concentrate for 2 times to obtain copper concentrate, and separating tailings to obtain lead-zinc concentrate pulp;

and 3, adding sodium sulfide into the lead-zinc ore concentrate pulp obtained in the step 2, stirring for 5 minutes, and then performing gravity separation on the lead-zinc ore by using a fine mud shaking table, wherein the stroke is 4-6mm, and the stroke frequency is 490-fold and 530 times/minute, so as to obtain zinc ore concentrate and lead ore concentrate.

2. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc according to claim 1, characterized by comprising the following steps: in the step 1, 25 g/t of copper sulfate, 15 g/t of butyl xanthate and 25 g/t of pine oil are added.

3. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc according to claim 1, characterized by comprising the following steps: in the step 2, 80 g/ton of activated carbon and 80 g/ton of sodium sulfide are added.

4. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc according to claim 1, characterized by comprising the following steps: the pH value of the ore pulp in the step 2 is 6.

5. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc according to claim 1, characterized by comprising the following steps: in the step 2, the concentration of the copper-lead-zinc separation ore pulp is 18%, and the concentration of the ore pulp subjected to copper concentration operation is 12%.

6. The comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc according to claim 1, characterized by comprising the following steps: the stroke in the step 3 is 5mm, and the stroke times are 510 times/min.

Technical Field

The invention relates to the technical field of mineral flotation separation processes, in particular to a comprehensive recovery process of iron symbiotic nonferrous metal copper, lead and zinc.

Background

The iron symbiotic copper-lead-zinc nonferrous metal mineral has the following characteristics: 1) the iron-cogenerated copper-lead-zinc ore has close embedding relationship and fine embedding granularity, and can realize the monomer dissociation of copper, lead and zinc only by fine grinding; 2) the comprehensive recovery of the iron-coexisting copper-lead-zinc ore mostly starts from iron dressing tailings, iron dressing tailing pulp comprises ferromagnetic dressing tailings and ferromagnetic concentrate desulfurization flotation foams, and more than 70% of sulfide minerals in the iron dressing tailing pulp have hydrophobic surfaces.

At present, the commonly used copper-lead-zinc separation method comprises the technological methods of preferential flotation of copper, lead and zinc in sequence, partial mixed flotation of copper and lead, zinc separation of tailings, separation of copper and lead, full mixed flotation of copper, lead and zinc, separation of copper and lead and zinc and the like. In the traditional process, after copper, lead and zinc are floated completely, only copper and lead and zinc can be separated to produce copper concentrate and lead and zinc concentrate, and separate lead concentrate and zinc concentrate cannot be obtained. The conventional method has the following problems: the produced lead-zinc concentrate has low valuation coefficient in the sale process and higher smelting process and cost; ② the separation effect of copper and lead and zinc is poor, and the mutual content of copper concentrate and lead and zinc concentrate is high.

Disclosure of Invention

The invention aims to provide a comprehensive recovery process of iron associated non-ferrous metals copper, lead and zinc, which aims to solve the problems that the existing comprehensive recovery process of iron associated non-ferrous metals copper, lead and zinc has low separation efficiency, poor indexes and high mutual content of concentrates, and single lead concentrate and zinc concentrate cannot be obtained.

In order to achieve the purpose, the comprehensive recovery process of the copper, lead and zinc of the iron symbiotic nonferrous metal is characterized by comprising the following steps of 1, adding lime into ore pulp of iron ore tailings to adjust the pH value of the ore pulp to be 10, grinding the ore pulp by using a ball mill, adding 20-30 g/ton of copper sulfate, 10-20 g/ton of butyl xanthate and 20-30 g/ton of pine alcohol oil into the ore pulp, stirring the mixture, carrying out copper-lead-zinc mixed rough concentration to obtain copper-lead-zinc mixed rough concentrate, adding lime into the copper-lead-zinc mixed rough concentrate to reach the pH value of 12, and carrying out copper-lead-zinc mixed fine concentration to obtain copper-lead-zinc concentrate; step 2, adding 50-100 g/ton of active carbon and 50-100 g/ton of sodium sulfide into the copper-lead-zinc ore concentrate pulp obtained in the step 1, grinding the copper-lead-zinc ore concentrate pulp, adding sodium metabisulfite and dilute sulfuric acid into the ground pulp, stirring the mixture for 5 minutes to ensure that the pH value of the pulp is 6-6.5, the adding ratio of the sodium metabisulfite to the dilute sulfuric acid is 2:1, the concentration of the copper-lead-zinc separation pulp is 15-20%, and the concentration of the copper-copper concentration pulp is 10-15%; carrying out concentration on the copper rough concentrate for 2 times to obtain copper concentrate, and separating tailings to obtain lead-zinc concentrate pulp; and 3, adding sodium sulfide into the lead-zinc ore concentrate pulp obtained in the step 2, stirring for 5 minutes, and then performing gravity separation on the lead-zinc ore by using a fine mud shaking table, wherein the stroke is 4-6mm, and the stroke frequency is 490-fold and 530 times/minute, so as to obtain zinc ore concentrate and lead ore concentrate.

In the technical scheme of the comprehensive recovery process of the iron symbiotic nonferrous metal copper, lead and zinc, the further preferred technical scheme is characterized in that:

1. in the step 1, 25 g/ton of copper sulfate, 15 g/ton of butyl xanthate and 25 g/ton of pine oil are added;

2. 80 g/ton of activated carbon and 80 g/ton of sodium sulfide are added in the step 2;

3. the pH value of the ore pulp in the step 2 is 6;

4. in the step 2, the concentration of the copper-lead-zinc separation ore pulp is 18 percent, and the concentration of the ore pulp subjected to copper concentration operation is 12 percent;

5. the stroke in the step 3 is 5mm, and the stroke times are 510 times/min.

Compared with the prior art, the method has the advantages that by means of the hydrophobicity of the residual medicament and the copper-lead-zinc mineral during iron separation, copper-lead-zinc mixed separation is carried out in the weak activation and weak collection environment, the subsequent separation difficulty of copper and lead-zinc is reduced, and the separation difficulty and the increase of the mutual content of concentrates caused by strong activation and strong collection are avoided; the copper-lead-zinc concentrate adopts low-concentration and strong-removal of chemicals, and realizes the separation of copper and lead-zinc minerals by utilizing the natural floatability of the copper minerals on the basis of cleaning and activating with dilute sulfuric acid and pyrosulfurous acid, thereby ensuring the qualified quality of the copper concentrate; lead-zinc concentrate adopts the fine mud shaking table to carry out lead-zinc separation, has obtained single lead concentrate, zinc concentrate, has solved traditional iron intergrowth copper lead-zinc and has selected separately and can't obtain single lead concentrate, zinc concentrate, and selects separately inefficiency, and the concentrate contains each other highly, the low scheduling problem of concentrate value.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1, a process for comprehensively recovering copper, lead and zinc from iron-symbiotic nonferrous metals comprises the following steps of 1, adding lime into ore pulp of iron-dressing tailings to adjust the pH value of the ore pulp to 10, grinding the ore pulp by using a ball mill, adding 20-30 g/ton of copper sulfate, 10-20 g/ton of butyl xanthate and 20-30 g/ton of pine alcohol oil, stirring, carrying out copper-lead-zinc mixed rough concentration to obtain copper-lead-zinc mixed rough concentrate, adding lime into the copper-lead-zinc mixed rough concentrate to reach the pH value of 12, and carrying out copper-lead-zinc mixed fine concentration to obtain copper-lead-zinc concentrate ore pulp; step 2, adding 50-100 g/ton of active carbon and 50-100 g/ton of sodium sulfide into the copper-lead-zinc ore concentrate pulp obtained in the step 1, grinding the copper-lead-zinc ore concentrate pulp, adding sodium metabisulfite and dilute sulfuric acid into the ground pulp, stirring the mixture for 5 minutes to ensure that the pH value of the pulp is 6-6.5, the adding ratio of the sodium metabisulfite to the dilute sulfuric acid is 2:1, the concentration of the copper-lead-zinc separation pulp is 15-20%, and the concentration of the copper-copper concentration pulp is 10-15%; carrying out concentration on the copper rough concentrate for 2 times to obtain copper concentrate, and separating tailings to obtain lead-zinc concentrate pulp; and 3, adding sodium sulfide into the lead-zinc ore concentrate pulp obtained in the step 2, stirring for 5 minutes, and then performing gravity separation on the lead-zinc ore by using a fine mud shaking table, wherein the stroke is 4-6mm, and the stroke frequency is 490-fold and 530 times/minute, so as to obtain zinc ore concentrate and lead ore concentrate. According to the invention, weak activation and weak collection are adopted for mixed copper-lead-zinc separation, copper-lead-zinc concentrate is strongly inhibited by adopting low-concentration strong removal to realize separation of copper and lead-zinc minerals, and lead-zinc concentrate is subjected to lead-zinc separation by adopting a fine mud shaking table. In the steps 1-3, the term "g/ton of raw ore" refers to the number of grams of medicament added to each ton of raw ore. The process in the step 1-2 is a closed-circuit flotation process flow.

Example 2, according to the comprehensive recovery process of copper, lead and zinc of iron symbiotic nonferrous metals described in example 1, 25 g/ton copper sulfate, 15 g/ton butyl xanthate and 25 g/ton pine oil are added in step 1.

Example 3, in the comprehensive recovery process of copper, lead and zinc non-ferrous metals from iron symbiosis according to example 1 or 2, 80 g/ton of activated carbon and 80 g/ton of sodium sulfide are added in step 2.

Example 4, in the process for comprehensively recovering copper, lead and zinc from iron symbiotic nonferrous metals according to example 1, 2 or 3, the pH value of the ore pulp in the step 2 is 6.

Example 5, in the process for comprehensively recovering copper, lead and zinc from iron-symbiotic nonferrous metals according to any one of examples 1 to 4, the concentration of the copper-lead-zinc separation pulp in the step 2 is 18%, and the concentration of the copper-concentration pulp in the copper-concentration operation is 12%.

Example 6, in the process for comprehensively recovering copper, lead and zinc from iron symbiotic nonferrous metals according to any one of examples 1 to 5, the stroke in the step 3 is 5mm, and the stroke frequency is 510 times/min.

Embodiment 7, a comprehensive recovery process of iron symbiotic nonferrous metal copper, lead and zinc, comprising the following steps: step 1, adding lime into the ore pulp of the total tailings of iron separation, milling the ore pulp with a ball mill under the condition that the pH value of the ore pulp is 10, adding 20 g/ton of copper sulfate, 10 g/ton of butyl xanthate and 20 g/ton of pine oil, stirring, carrying out copper-lead-zinc mixed roughing, adding lime into the copper-lead-zinc mixed rough concentrate to reach the pH value of 12, and carrying out copper-lead-zinc mixed concentration to obtain copper-lead-zinc concentrate ore pulp; step 2, adding 50-100 g/ton of active carbon and 50 g/ton of sodium sulfide into the copper-lead-zinc ore concentrate pulp obtained in the step 1, grinding the copper-lead-zinc ore concentrate pulp, adding sodium metabisulfite and dilute sulfuric acid, and stirring for 5 minutes to ensure that the pH value of the pulp is 6, the adding ratio of the sodium metabisulfite to the dilute sulfuric acid is 2:1, the concentration of the copper-lead-zinc separation pulp is 20%, and the concentration of the copper concentration operation pulp is 15%; carrying out concentration on the copper rough concentrate for 2 times to obtain copper concentrate, and separating tailings to obtain lead-zinc concentrate pulp; and 3, adding sodium sulfide into the lead-zinc concentrate ore pulp obtained in the step 2, stirring for 5 minutes, and then performing gravity separation on the lead-zinc ore by using a fine mud shaking table, wherein the stroke is 6mm, and the stroke frequency is 490 times/minute. Obtaining zinc concentrate and lead concentrate.

The detection shows that the copper grade of the total iron-selecting tailing pulp in the embodiment 7 is 0.4%, the lead grade is 1.1% and the zinc grade is 1.2%; the copper concentrate obtained by the method has the advantages of 20.14% of copper grade, 2.78% of lead grade, 4.58% of zinc grade, 60.12% of copper recovery rate, 42.27% of lead grade, 0.67% of copper grade, 5.76% of zinc grade and 70.46% of lead recovery rate; the zinc grade of the zinc concentrate is 41.45 percent, the copper grade is 1.03 percent, the lead grade is 3.16 percent, and the zinc recovery rate is 71.34 percent.

In comparison with example 1, the traditional copper-lead-zinc mixed flotation-copper-lead-zinc separation process is adopted, lime is added into the same iron ore dressing tailings, water enters a ball mill to be ground until the fineness of the ore pulp is-0.074 mm, the fraction accounts for 80%, the pH value of the ore pulp is 10, then 200 g/ton of copper sulfate, 120 g/ton of butyl xanthate and 60 g/ton of 2# oil are added into the ore pulp, and after stirring, copper-lead-zinc mixed rough concentration and copper-lead-zinc mixed concentration (the pH value of the concentrated ore pulp is 12) are carried out, so that copper-lead-zinc ore concentrate pulp is obtained. The copper-lead-zinc ore concentrate pulp is reground, then sodium sulfide 200 g/ton of raw ore is added, liquid sulfur dioxide 1500 g/ton of raw ore is added, and then separation of copper-lead and zinc minerals is carried out to obtain copper concentrate and lead-zinc concentrate. According to detection, the copper grade of the total tailings pulp of iron separation described in the comparative example 1 is 0.4%, the lead grade is 1.1%, and the zinc grade is 1.2%; the copper concentrate obtained by the method of the comparative example 1 has 16.12% of copper grade, 6.23% of lead grade, 14.65% of zinc grade and 48.78% of copper recovery rate; the lead grade of the lead-zinc concentrate is 14.23 percent, the zinc grade is 27.23 percent, the copper grade is 3.23 percent, the lead recovery rate is 60.23 percent, and the zinc recovery rate is 70.89 percent. Compared with the embodiment 1, the copper concentrate has lower copper grade and recovery rate, and the lead-zinc concentrate is produced, so that single lead concentrate and zinc concentrate cannot be produced.

Embodiment 8, a comprehensive recovery process of iron symbiotic nonferrous metal copper, lead and zinc, comprising the following steps: step 1, adding lime into the ore pulp of the iron ore tailings, grinding the ore pulp with a ball mill under the condition that the pH value of the ore pulp is 10, adding 30 g/ton of copper sulfate, 20 g/ton of butyl xanthate and 30 g/ton of pine oil, stirring, carrying out copper-lead-zinc mixed roughing, adding lime into the copper-lead-zinc mixed rough concentrate to reach the pH value of 12, and carrying out copper-lead-zinc mixed concentration to obtain copper-lead-zinc concentrate ore pulp; step 2, adding 100 g/ton of active carbon and 50-100 g/ton of sodium sulfide into the copper-lead-zinc ore concentrate pulp obtained in the step 1, grinding the copper-lead-zinc ore concentrate pulp, adding sodium metabisulfite and dilute sulfuric acid, and stirring for 5 minutes to ensure that the pH value of the pulp is 6, the adding ratio of the sodium metabisulfite to the dilute sulfuric acid is 2:1, the concentration of the copper-lead-zinc separation pulp is 15 percent, and the concentration of the copper concentration operation pulp is 10 percent; carrying out concentration on the copper rough concentrate for 2 times to obtain copper concentrate, and separating tailings to obtain lead-zinc concentrate pulp; and 3, adding sodium sulfide into the lead-zinc concentrate ore pulp obtained in the step 2, stirring for 5 minutes, and then performing gravity separation on the lead-zinc ore by using a fine mud shaking table, wherein the stroke is 4, and the stroke frequency is 530 times/minute. Obtaining zinc concentrate and lead concentrate.

According to detection, the copper grade, the lead grade and the zinc grade in the iron ore tailing pulp of the embodiment 8 are respectively 0.6%, 1.5% and 2.2%; the copper concentrate obtained by the method has 21.34% of copper grade, 2.18% of lead grade, 2.27% of zinc grade, 77.67% of copper recovery rate, 45.43% of lead grade of lead concentrate, 0.54% of copper grade, 6.28% of zinc grade and 79.21% of lead recovery rate; the zinc grade of the zinc concentrate is 47.78 percent, the copper grade is 0.67 percent, the lead grade is 4.76 percent, and the zinc recovery rate is 82.43 percent.

In comparison example 2, the traditional copper-lead-zinc mixed flotation-copper-lead-zinc separation process is adopted, lime is added into the same iron ore dressing tailings, water enters a ball mill to be ground until the ore pulp fineness is 85% of the grade with minus 0.074mm and the pH value of the ore pulp is 12, then 300 g/ton of copper sulfate, 150 g/ton of butyl xanthate and 80 g/ton of pine alcohol oil are added into the ore pulp, and after stirring, copper-lead-zinc mixed rough concentration and copper-lead-zinc mixed concentration (the pH value of the concentrated ore pulp is 12) are carried out, so that copper-lead-zinc ore concentrate ore pulp is obtained. The copper-lead-zinc ore concentrate pulp is reground, then 700 g of sodium sulfide is added per ton of raw ore, 1500 g of liquid sulfur dioxide per ton of raw ore is added, and then separation of copper-lead and zinc minerals is carried out to obtain copper concentrate and lead-zinc concentrate. According to detection, the iron ore dressing tailings in the comparative example 2 have the copper grade of 0.6 percent, the lead grade of 1.5 percent and the zinc grade of 2.2 percent; the copper concentrate obtained by the method of the comparative example 2 has 19.23% of copper grade, 12.23% of lead grade, 13.28% of zinc grade and 70.27% of copper recovery rate; the lead grade of the lead-zinc concentrate is 20.23 percent, the zinc grade is 24.54 percent, the copper grade is 4.64 percent, the lead recovery rate is 75.34 percent, and the zinc recovery rate is 79.34 percent. Compared with the embodiment 2, the copper concentrate has lower copper grade and recovery rate, and the lead-zinc concentrate is produced, so that single lead concentrate and zinc concentrate cannot be produced.

The above description is only for the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept thereof within the scope of the present invention.