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A kind of beneficiation method of copper-lead-zinc polymetallic ore

A technology of polymetallic ore and ore dressing method, which is applied in the direction of solid separation, etc., can solve problems such as high mutual content of concentrate, difficult separation, and unqualified product quality, so as to improve the grade and recovery rate of concentrate, improve the production environment, The effect of drug dosage reduction

Active Publication Date: 2016-09-21
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

[0002] Copper-lead-zinc complex sulfide ore, due to the dense symbiosis of several metals, the fine particle size intercalated with each other, it is very difficult to sort; the treatment of this kind of ore at home and abroad is generally to grind the ore to the required fineness, and obtain copper, lead and zinc through flotation. Mix the concentrate, and then separate the copper, lead and zinc minerals; the main disadvantage of this process is that after the copper, lead and zinc minerals undergo mixed flotation, it is difficult to remove the drug and the separation effect is poor
[0003] There are three main beneficiation methods for separating copper, lead, and zinc from copper-lead-zinc mixed concentrate. One is the heating method, which means that various chemicals on the surface of the mineral are desorbed by heating, resulting in differences in mineral buoyancy to achieve separation. Purpose: This method is to use steam to heat the copper-lead mixed concentrate to about 60°C. In the acidic or neutral slurry, the collector on the surface of the galena is desorbed, and the surface is oxidized and hydrophilic, while the chalcopyrite It still floats up to realize the separation of copper and lead; the second is to use cyanide to suppress copper and float lead to achieve the purpose of separation, but cyanide has a strong inhibitory effect on chalcopyrite, and galena has almost no inhibitory effect. Using this method can Suppress copper and float lead, and get better results; the third is the method of adding organic salts, that is, using starch, baked gum, dextrin, etc., to inhibit the flotation of copper minerals in galena; but the methods listed above have common The problem is that the separation effect of various metal minerals is not good, the metal recovery rate is low, and the mutual content of each concentrate is high, resulting in unqualified copper, lead, and zinc concentrate products. Some methods are poisonous agents and pollute the environment, and some methods High energy consumption, high production cost, difficult to control the production process, not suitable for large-scale promotion

Method used

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Examples

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Embodiment 1

[0035] Example 1: A polymetallic ore deposit in Qinghai is selected as the disseminated copper-lead-zinc polymetallic ore as the raw ore. In this ore, chalcopyrite, galena, sphalerite, and pyrrhotite are embedded with uneven particle size and symbiotic The relationship is complex, the copper grade is low, the zinc mineral is mainly sphalerite, and the magnetite content is as high as 28%, which is a typical complex polymetallic sulfide ore. The ore contains Cu0.30%, Pb2.30%, Zn1.65%, S12.73%, Ag17.67g / t, and carbon 3.80%.

[0036] Such as figure 1A kind of beneficiation method of copper-lead-zinc polymetallic ore shown, comprises the following steps:

[0037] Raw ore grinding: The crushed raw ore and water are added to the ball mill in a ratio of 1:1 for grinding, and the amount of sodium sulfide (a) is 200g / t and lime (b) is 2500g / t ( Based on the weight of raw ore dry ore, the same below), until the grinding fineness of the ore grinding product is -74μm, it accounts for 70%...

Embodiment 2

[0042] Example 2: The raw ore is selected from a complex copper-lead-zinc sulfide ore in Tibet, which is a typical refractory polymetallic sulfide ore with a complex intercalation relationship. The copper minerals in this ore are mainly chalcopyrite, and the chalcopyrite distribution is uneven. It belongs to fine-grained inlaid cloth, generally between 0.01-0.2mm, coarse-grained up to 2mm, and fine-grained less than 0.005mm; Iron ore and arsenopyrite are closely symbiotic, and the results of particle size screening show that the copper and lead in the ore are interspersed with finer particles and complex characteristics; The iron ore mosaic relationship is relatively close, and encased mosaic and interlaced mosaic are more common; pyrrhotite chalcopyrite less than 0.037mm has a large proportion, and it exists in sphalerite in the form of emulsion droplet and irregular fine grain inclusions Medium; ore contains C 4.10%, Cu 0.17%, Pb

[0043] Such as figure 1 A kind of benefic...

Embodiment 3

[0049] Example 3: The raw ore is selected from a copper-lead-zinc polymetallic sulfide ore in Gansu. The useful minerals in the ore are not only fine in particle size, but also complex in distribution, and the ore is a complex high-sulfur polymetallic sulfide ore. Valuable metals are sphalerite, galena and pyrite, followed by a small amount of chalcopyrite, which is unevenly distributed and is fine-grained; sphalerite and pyrrhotite, pyrite, The intercalation relationship of chalcopyrite is very close, and wrapped inlay and interlaced inlay are more common; the results of particle size analysis show that the intercalation relationship of chalcopyrite and galena is complex and the particle size is fine; the ore contains Cu0.14%, Pb2.13%, Zn4.03%, S17.16%, Ag27.22g / t.

[0050] Such as figure 1 A kind of beneficiation method of copper-lead-zinc polymetallic ore shown, comprises the following steps:

[0051] Raw ore grinding: the crushed raw ore and water are put into a ball mill ...

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Abstract

The invention discloses a beneficiation method for cu-pb-zn polymetallic ores, and belongs to the technical field of non-ferrous metal beneficiation. According to the technical scheme, the characteristic of complex cu-pb-zn-sulfur polymetallic ores with embedded fine-grained carbon level is utilized, a technological process of carbon-removing, cu-pb partial bulk flotation, cu-pb separation and zn-and-sulfur choosing in tailings is adopted, a concentration and fine grinding mode is adopted to achieve deep reagent removal, the influence of slurry on flotation is effectively eliminated, efficient collectors A8 and depressors T721 for cu-pb separation are used in the cu-pb partial bulk flotation process, separation and recovery of copper, lead, zinc and sulfur are effectively achieved, and concentrate mixing is obviously lowered.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal beneficiation, and relates to a beneficiation method of copper-lead-zinc polymetallic ore. Background technique [0002] Copper-lead-zinc complex sulfide ore, due to the dense symbiosis of several metals, the fine particle size intercalated with each other, it is very difficult to sort; the treatment of this kind of ore at home and abroad is generally to grind the ore to the required fineness, and obtain copper, lead and zinc through flotation. Mix the concentrate, and then separate the copper, lead and zinc minerals; the main disadvantage of this process is that after the copper, lead and zinc minerals are mixed and flotation, it is difficult to remove the drug and the separation effect is poor. [0003] There are three main beneficiation methods for separating copper, lead, and zinc from copper-lead-zinc mixed concentrate. One is the heating method, which means that various chemicals o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B1/00B03B1/04B03B1/02
Inventor 师伟红刘守信余江鸿周涛吴斌顾小玲高彦萍戚福军梁友乾
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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