Fluoride-free low-acid zwitterion quartz sand reverse flotation process

A technology of anion and cation, quartz sand, applied in flotation, solid separation and other directions, can solve the problems of strong acid beneficiation equipment and corrosion effect can not be ignored, flotation index fluctuates greatly, and the separation performance is not good, so as to achieve low production cost , the effect of resource saving and simple process

Active Publication Date: 2012-07-25
陕西合兴硅砂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activator and pH regulator used in the hydrofluoric acid method are hydrofluoric acid. Although the selectivity is good, the fluoride ion treatment and secondary pollution problems in the later stage are difficult to solve; the biggest advantage of the sulfuric acid flotation process is that it avoids the use of Fluoride ion, which has a destructive effect on the environment, has a stable production index, but the strong acid can not be ignored on the beneficiation equipment and corrosion, and has higher requirements on the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Example 1:

[0025] Quartz sand roughly processed from vein quartzite is used as raw material, crushed and sieved to prepare quartz sand of 60-140 mesh, and the concentration of quartz sand is adjusted to 60wt% with water to scrub for 6 minutes. Under the condition of s, magnetic separation and iron removal are used for pretreatment; the pretreated quartz sand is flotationed by two-stage anion and cation reverse flotation technology, and the concentration of the pretreated quartz sand slurry is adjusted to 24wt% with clean water, and the one-stage flotation , use 200g / t of regulator sulfuric acid to adjust the pulp to a pH value equal to 5 and inflate and stir for 3 minutes, add 80g / t cationic collector dodecylpropylenediamine and inflate for 3min, then add 75g / t of The foaming agent pine alcohol oil was stirred for 3 minutes, and foamed for 4 minutes; in the second-stage flotation, the pH value of the pulp after the first-stage flotation was adjusted to 9 with 300g / t r...

Example Embodiment

[0026] Example 2:

[0027]Quartz sand roughly processed from vein quartzite is used as raw material, crushed and sieved to prepare quartz sand of 60-140 mesh, and the concentration of quartz sand is adjusted to 60wt% with water to scrub for 6 minutes. Under the condition of s, the pretreatment is carried out by magnetic separation and iron removal; the pretreated quartz sand is flotationed by two-stage anion and cation reverse flotation technology, and the concentration of the pretreated quartz sand ore slurry is adjusted to 24wt% with clean water, and the one-stage flotation , use 100g / t of sulfuric acid to adjust the pH value of the pulp to 5 and inflate and stir for 5 minutes, add 40g / t cationic collector polypropylene diamine and inflate and stir for 5 minutes, then add 60g / t foaming agent terpineol oil and stir for 5 minutes, Scraping for 5 minutes; in the second-stage flotation, use 200g / t of regulator sodium carbonate to adjust the pH value of the pulp after the first-s...

Example Embodiment

[0028] Example 3:

[0029] Quartz sand roughly processed from vein quartzite is used as raw material, crushed and sieved to produce 60-140 mesh quartz grains, and the concentration of quartz sand is adjusted to 60wt% with water. After scrubbing for 6 minutes, the Under the condition of magnetic separation and iron removal under the condition of / s for pretreatment; adopt two-stage anion and cation reverse flotation process to flotation the pretreated quartz sand, adjust the concentration of the pretreated quartz sand slurry to 24wt% with clean water, and one-stage flotation , use 200g / t regulator sulfuric acid to adjust the pH value of the pulp to 5 and inflate and stir for 5 minutes, add 40g / t cationic collector dodecylpropylenediamine inflate and stir for 5min, then add 60g / t foaming agent Stir pine alcohol oil for 5 minutes, scrape and bubble for 5 minutes; in the second stage flotation, use 300g / t of regulator sodium carbonate to adjust the pH value of the pulp after the f...

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PUM

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Abstract

The invention relates to fluoride-free low-acid zwitterion quartz sand reverse flotation process, which is characterized by comprising following steps: (1) pretreatment; (2) flotation: adjusting the pH (potential of hydrogen) value of ore pulp to 4-5 by sulfuric acid, performing air agitation, adding 40g/t-80g/t of positive ion collecting agent and 60g/t-75g/t of foaming agent, stirring and removing foams in primary flotation; and adjusting the pH value of the ore pulp to 9-10 by 200g/t-300g/t of sodium carbonate, performing air agitation, adding 80g/t-150g/t of negative ion collecting agent,then adding 60g/t-75g/t of foaming agent, stirring and removing foams in secondary floatation; and (3) washing ores in a flotation tank by water until the ores are neutral, and drying the ores to obtain quartz sand concentrates. The flotation collecting agents are fine in selectivity, the process is simple, cost is low, the purity of the quartz sand is high, the content of iron and aluminum impurities is low, and the problem that traditional fluoride and high-acid process damages equipment and environments is avoided in a flotation process.

Description

[0001] technical field [0002] The invention belongs to the field of non-metallic mineral processing, and in particular relates to a fluorine-free, low-acid anion and cation reverse flotation process for quartz sand, which reduces the iron-aluminum metal impurity minerals contained in the quartz sand and prepares refined quartz sand. Background technique [0003] With the strong demand for global strategic low-carbon energy-saving technologies, the research and development of new energy and new materials represented by solar energy urgently needs high-purity quartz as a basic material. High-purity quartz is a functional material with a wide range of uses, such as solar crystalline silicon cells, quartz crucibles, integrated circuit boards, electronic packaging materials, optical fibers, liquid crystal displays, lasers, silicon ingots, silicon rods, silicon wafers, and monocrystalline silicon , polysilicon, aerospace (video screen windows, rocket nozzles, etc.), national def...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03B1/00B03B1/04B03D1/012B03D101/02
Inventor 雷绍民项婉茹刘云涛张凤凯
Owner 陕西合兴硅砂有限公司
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