A kind of method of direct flotation of zinc sulfide ore

A zinc sulfide ore and zinc sulfide technology, applied in flotation, solid separation, etc., can solve the problems of difficult activation, increased amount of activator, and intermetallic inclusion of metals, and achieve simple flotation process, less amount of collector, The effect of fast flotation speed

Active Publication Date: 2019-02-05
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, sphalerite copper sulfate activated xanthate flotation also has some unsatisfactory disadvantages:
[0003] (1) Copper sulfate has a good activation effect on sphalerite and some iron sphalerites with low iron content, but the activation becomes more and more difficult as the iron content of sphalerite increases and the amount of activator is greatly increased. increase, the activation of sphalerite often fails to achieve the desired activation effect;
[0004] (2) Practice shows that sphalerite activated by copper sulfate is difficult to be suppressed. Secondly, copper sulfate, as a broad-spectrum activator in the mineral processing field, can also cause a certain degree of damage to other non-ferrous metal sulfide ores and even gangue minerals. Activation, these factors make the separation of sphalerite and other metal sulfide ores very difficult, such as copper-zinc separation, lead-zinc separation, etc., resulting in low-grade zinc concentrate and metal intercontainment problems;
[0005] (3) The addition of copper sulfate undoubtedly increases the cost of beneficiation

Method used

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  • A kind of method of direct flotation of zinc sulfide ore

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Experimental program
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Effect test

Embodiment 1

[0020] The ore to be selected is a lead-zinc sulfide ore in Sichuan. The ore contains 1.45wt% lead and 4.11wt% zinc, and more than 90wt% of the zinc content is sphalerite, and the sphalerite contains 1.68wt% iron. Grind the ore to make a slurry with a concentration of 25% by weight, in which -200 mesh ore powder accounts for 85wt% of the total ore powder, add hydrochloric acid solution to adjust the pH of the slurry to 6-7 and stir for 2 minutes, then add collector Sodium dodecyl dithiocarbamate 60g / t acted for 2 minutes, then added pine alcohol oil foaming agent 20g / t acted for 2 minutes, then started flotation for 6 minutes, the recovery rate of lead and zinc was as high as 86%.

Embodiment 2

[0022] The ore to be selected is a polymetallic sulfide ore in Yunnan. The ore contains lead, zinc, iron, sulfur, indium, gallium, germanium, etc., and its mineral content is about 8.5wt% sphalerite. The iron content in sphalerite is 10.5wt%. Grind the ore to make a slurry with a concentration of 40% by weight, in which -200 mesh ore powder accounts for 90wt% of the total ore powder, add calcium hydroxide solution to adjust the pH to 10-11 and stir for 2 minutes, add copper sulfate 50g / t activation for 2 minutes, then add collector sodium dodecyl dithiocarbamate 90g / t, then add pine oil foaming agent 25g / t to act for 2 minutes, then start flotation for 6 minutes, the recovery rate of lead and zinc is as high as More than 80%.

Embodiment 3

[0024] The ore to be processed is a low-grade lead-zinc sulfide mine in Yunnan. The ore contains 1.61wt% zinc, 3.25wt% lead, and 6.32wt% iron, of which zinc and lead sulfides account for more than 90wt%. 33% ore pulp, of which -200 mesh ore powder accounts for 95wt% of the total ore powder, add calcium hydroxide solution to adjust the pH to 9-10 and stir for 2 minutes, then add collector sodium n-butyldithiocarbamate 70g / t , then add pine oil foaming agent 30g / t to act for 2 minutes and then start flotation for 6 minutes, the recovery rate of lead and zinc is as high as 80%.

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Abstract

The invention relates to a direct flotation method of zinc sulfide ore. The method includes the steps of grinding the zinc sulfide ore to form ore pulp, adjusting the PH value of the ore pulp to reach 6-11, adding N-alkyl dithiocarbamic acid sodium as a collecting agent and terpenic oil as a foaming agent into the ore pulp, adding zero or little copper sulfate as an activating agent and carrying out flotation. According to the method, copper activation-free direct flotation of the zinc sulfide ore can be realized, the use amount of copper sulfate can be remarkably lowered, and subsequent flotation separation of zinc sulfide and other metal sulfide ore can be promoted.

Description

technical field [0001] The invention relates to a direct flotation method of zinc sulfide minerals, which can realize direct flotation of zinc sulfide minerals without copper activation, and belongs to the field of mineral processing engineering. Background technique [0002] my country is rich in zinc resources, and its zinc reserves rank second in the world. About 90% of industrial zinc production comes from zinc sulfide minerals. Sphalerite and sphalerite are the most common zinc sulfide minerals in nature. There are few pure sphalerites in nature, and most sphalerites usually contain some iron impurities. When the iron content in sphalerite is greater than 6%, it is called iron sphalerite (Zn x Fe 1-x S), when the iron content is greater than 20%, it is called ultra-high iron sphalerite. The color of sphalerite depends on the type and content of impurity elements in the crystal lattice. Generally, sphalerite with higher iron content is darker in color, while purer spha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/02B03D1/012B03B1/00B03D101/02B03D103/02
CPCB03B1/00B03D1/012B03D1/02B03D2201/02B03D2203/02
Inventor 刘建陈瑜罗德强文书明白旭
Owner KUNMING UNIV OF SCI & TECH
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