Flotation method for lead and zinc ore difficult to select

A lead-zinc ore and refractory technology, applied in flotation, solid separation and other directions, can solve the problems of low metal grade and recovery rate, high production cost, high lead-zinc mutual content, and achieve ideal separation indicators and lead-zinc mutuality. Contains reduced, easy-to-operate effects

Inactive Publication Date: 2014-03-19
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for flotation of refractory lead-zinc ores to solve the practical problems of high lead-zinc mutual content, low metal grade and recovery rate, and high production cost in the production process

Method used

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  • Flotation method for lead and zinc ore difficult to select

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Comparison scheme
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Embodiment 1

[0029] The ore processed in this embodiment contains 1.22% lead and 1.24% zinc.

[0030] The priority flotation process is adopted, specifically, the process of first roughing, two sweeps and three refinements is used to preferentially flotation lead, and the tailings of lead sweeping are adopted to flotation zinc by one process, two sweeps and three refinements. Specifically include the following steps:

[0031] (1) Rough separation of lead: first put the raw ore into the grinding machine, then add lime 2000g / t, zinc sulfate 1000g / t, sodium sulfite 500g / t for grinding, put the raw ore after grinding into flotation tank, add 60g / t of ethyl dithiazide, 10g / t of ethyl xanthate, 40g / t of terpineol oil to carry out flotation, and obtain lead rough concentrate through flotation;

[0032] (2) Lead sweeping: carry out two sweeps to the lead roughing tailings, add 500g / t of zinc sulfate, 250g / t of sodium sulfite, and 30g / t of ethylsulfite to the lead roughing tailings in the first sw...

Embodiment 2

[0048] The ore processed in this embodiment contains 1.22% lead and 1.24% zinc.

[0049]The priority flotation process is adopted, specifically, the process of first roughing, two sweeps and three refinements is used to preferentially flotation lead, and the tailings of lead sweeping are adopted to flotation zinc by one process, two sweeps and three refinements. Specifically include the following steps:

[0050] (1) Rough separation of lead: first put the raw ore into the grinding machine, then add lime 2200g / t, zinc sulfate 1100g / t, sodium sulfite 550g / t for grinding, put the raw ore after grinding into flotation trough, adding 65g / t of ethyl thiazolin, 12g / t of ethyl xanthate, 40g / t of terpineol oil for flotation, and obtained lead rough concentrate through flotation;

[0051] (2) Lead sweeping: carry out two sweeps to the lead roughing tailings, add 550g / t of zinc sulfate, 260g / t of sodium sulfite, and 35g / t of ethylsulfite to the lead roughing tailings in the first sweep ...

Embodiment 3

[0067] The process of the invention is applied in industry and compared with the original process index. The processed ore is low-grade refractory lead-zinc ore, and the contents of lead and zinc in the ore are shown in Table 1. The priority flotation process is adopted, specifically, the process of first roughing, two sweeps and three refinements is used to preferentially flotation lead, and the tailings of lead sweeping are adopted to flotation zinc by one process, two sweeps and three refinements. Specifically include the following steps:

[0068] (1) Rough separation of lead: Put the raw ore into a grinding machine, add lime 2000g / t, zinc sulfate 1000g / t, sodium sulfite 500g / t into the mill, put the raw ore after grinding into the flotation cell, add 60g / t of ethyl dithiazide, 10g / t of ethyl xanthate, 40g / t of terpineol oil are used for flotation, and the rough concentrate of lead is obtained through flotation;

[0069] (2) Lead sweeping: carry out two sweeps to the lead...

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Abstract

The invention relates to a flotation method for lead and zinc ore difficult to select. The method includes the following steps of lead roughing, two-time lead scavenging, three-time lead fine selection, zinc roughing, two-time zinc scavenging and three-time fine selection. Lime serves as regulators, zinc sulfate and sodium sulfite serve as zinc inhibitor, diethyl dithiocarbamate and ethyl xanthogenate serve as lead collecting agents, copper sulfate serves as zinc activating agents, ammonium dibutyl dithiophosphate serves as zinc collecting agents, and terpenic oil serves as foaming agents. The lead and zinc ore difficult to select is processed by the adoption of lead differential flotation and zinc selection technological processes, and the practical problems that in original technological processes, zinc contains a high content of lead which contains a high content of the zinc, and the lead recovery rate and the zinc recover rate are low are solved. The technological processes are simple, reliable, easy to operate, and good in sorting index. Compared with the original technological processes, the method has the advantages that under the circumstance that raw ore contains the same lead and zinc, mutual containing of the lead and zinc is reduced, and the lead recovery rate and the zinc recovery rate are greatly increased and increased by 9.29% and 9.05% respectively.

Description

1. Technical field [0001] The invention belongs to the technical field of mineral flotation separation, in particular to a flotation method for refractory lead-zinc ore. 2. Background technology [0002] The world's proven basic reserves of lead are 79 million tons, resource reserves are 170 million tons, basic zinc reserves are 180 million tons, and resource reserves are 480 million tons. my country is rich in lead-zinc ore resources, among which the basic reserve of lead reaches 12.84 million tons, the resource reserve reaches 37.57 million tons, the basic reserve of zinc reaches 37.63 million tons, and the resource reserve reaches 92.67 million tons, ranking second in the world. However, with the extension of mining time, high-grade lead-zinc ores are decreasing day by day, and low-grade refractory lead-zinc ores have become an important source of raw materials for lead-zinc beneficiation. At present, the beneficiation process of lead-zinc sulfide ore mainly adopts mixed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/002B03D1/012B03D1/008B03B1/04B03D101/06B03D101/02B03D101/04
Inventor 杨金林莫伟马少健张红梅封金鹏王桂芳苏秀娟
Owner GUANGXI UNIV
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