A kind of method of flotation of high-sulfur lead-zinc ore

A high-sulfur-lead, lead-zinc ore technology, applied in flotation, solid separation and other directions, can solve the problems of difficulty in obtaining high-grade lead-zinc concentrate products, low ore beneficiation recovery rate, and high product mutual content, and achieves good applicability and comprehensiveness. The effect of high recovery rate and excellent separation index

Active Publication Date: 2020-12-15
KUNMING METALLURGY INST
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Problems solved by technology

Although high-sulfur lead-zinc ore has produced a lot of mineral processing technology development in recent years, its adaptability is poor, the recovery rate of mineral processing is low, and the mutual content of products is high.
For high-sulfur lead-zinc mines, the industry generally adopts a full-priority flotation process (first select lead, then zinc, and finally sulfur), and fail to obtain satisfactory technical indicators, making it difficult to obtain high-grade lead-zinc concentrate products

Method used

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  • A kind of method of flotation of high-sulfur lead-zinc ore

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Effect test

Embodiment 1

[0039]A concentrator in Zhaotong, Yunnan, contains 6.97% lead, 18.23% zinc, and 14.56% iron. The main metal minerals are sulfide minerals (galena, sphalerite and pyrite), with coarse particle size and buoyancy Very good, using the conventional full-priority flotation method, the recovery rate of lead-zinc metal is low, the mutual content of lead-zinc is high, and the consumption of chemicals is large. In order to effectively recover lead-zinc-sulfur minerals, the above-mentioned ores are processed through the following process steps:

[0040] A. Grinding: Grinding the raw ore to -74 microns accounts for 65%;

[0041] B. Preliminary separation of lead and zinc: The ground pulp is subjected to two-stage roughing and two-stage sweeping for the preliminary separation of lead-sulfur-zinc. Sequentially return to the previous layer of operations, the process conditions of the lead and sulfur roughing 1 are to add 2500 g / ton of zinc sulfate and stir for 3 minutes to fully combine the ...

Embodiment 2

[0047] A concentrator in Huize, Yunnan, contains 6.23% lead, 19.62% zinc, and 16.53% iron. The main metal minerals are sulfide minerals (galena, sphalerite, and pyrite), and the embedded particle size is relatively coarse. The properties are very good, and the above-mentioned ore samples are processed through the following process steps:

[0048] A. Grinding: Grinding the raw ore to -74 microns accounts for 70%;

[0049] B. Preliminary separation of lead and zinc: The ground pulp is subjected to two-stage roughing and two-stage sweeping for the preliminary separation of lead-sulfur-zinc. Sequentially return to the previous layer of operations, the process conditions of the lead and sulfur roughing 1 are to add 3000 g / ton of zinc sulfate and stir for 4 minutes to fully combine the agent and ore; then add 250 g / ton of ethyl disulfide and 20 g of 730A / ton, stirring for 1.5 minutes, so that the agent and the ore are fully combined; the process conditions of lead sulfur roughing...

Embodiment 3

[0055] A concentrator in Inner Mongolia contains 4.51% lead, 8.44% zinc and 19.62% iron. The main metal minerals are sulfide minerals (galena, sphalerite and pyrite). Well, the above-mentioned ore sample is processed through the following process steps:

[0056] A. Grinding: Grinding the raw ore to -74 microns accounts for 68%;

[0057] B. Preliminary separation of lead and zinc: The ground pulp is subjected to two-stage roughing and two-stage sweeping for the preliminary separation of lead-sulfur-zinc. Sequentially return to the previous layer of operations, the process conditions of the lead and sulfur roughing 1 are to add 2000 g / ton of zinc sulfate, 1000 g / ton of sodium sulfite, and stir for 4 minutes to fully combine the agent and ore; then add 100 g of ethion / ton, dixanthate 100 g / t, MIBC 30 g / t, stirring for 1.5 minutes to fully combine the agent and ore; the process conditions for lead and sulfur roughing 2 are to add zinc sulfate 1000 g / t, sodium sulfite 500 g / t T...

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Abstract

The invention discloses a method for efficient flotation of a high-sulfur lead zinc ore. The method comprises the steps that A, ore grinding is conducted; B, lead and zinc are initially separated, specifically, ground ore pulp is subjected to lead sulfur-zinc initial separation with two stages of roughing and two stages of scavenging, ore concentrates in two-time roughing are combined into lead-sulfur mixed rough concentrates, and middlings in two-time scavenging are returned to previous-layer operation; C, the lead-sulfur mixed rough concentrates are subjected to one stage of dezincificationroughing, one stage of dezincification concentration and two stages of dezincification scavenging, thus lead-sulfur mixed concentrates are obtained, and middlings in dezincification concentration anddezincification scavenging 1 are returned to dezincification roughing, and tailings in dezincification scavenging 2 are returned to lead-sulfur scavenging 1; D, tailings produced in lead-sulfur scavenging 2 are subjected to zinc flotation operation with two stages of roughing and two stages of scavenging, and zinc concentrates and tailings are obtained; and E, the lead-sulfur mixed concentrates are subjected to lead-sulfur separation operation with one stage of roughing, one stage of scavenging and two stages of concentration, and qualified lead concentrates and sulfur concentrates are obtained. According to the method, the separation index is excellent, the separation efficiency is high, the chemical agent cost is low, water returning treatment is easy, the energy saving and environmentalprotection effects are good, and applicability is good.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a high-efficiency flotation method for high-sulfur lead-zinc ore. Background technique [0002] One of the main uses of lead is to make lead-acid batteries. With the continuous development of the automobile industry, the proportion of lead used in batteries continues to increase. At present, the number of cars in the world is 650 million, and the battery life is generally only 3 to 4 years, so a large number of batteries need to be replaced every year. Since lead output and growth rate are not up to the downstream demand of the lead industry, supply exceeds demand. Zinc has good calenderability, wear resistance, corrosion resistance, castability, and good mechanical properties at room temperature, and can be made into alloys with various metals, mainly galvanized, zinc-based alloys, zinc oxide The form is widely used in automobiles, construction, househol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D103/02
CPCB03D1/00B03D2203/02
Inventor 罗进简胜梁溢强杨林张晶乔吉波
Owner KUNMING METALLURGY INST
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