Ore dressing purifying method for high-purity quartz sand

A technology of high-purity quartz sand and purification method, which is applied in the field of non-metallic ore beneficiation and purification, can solve the problems of difficulty in realizing standardized supply of raw materials, unstable product quality, and low high-grade reserves, etc., and achieves high yield, low production cost, high value-added effects

Inactive Publication Date: 2019-01-01
SINOSTEEL MAANSHAN INST OF MINING RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, my country's crystal deposits have many lean ores, few rich ores, and few high-grade reserves. Most of them are associated ore deposits. The mining conditions are poor. After mining, manual sorting is often used. standardized supply of

Method used

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  • Ore dressing purifying method for high-purity quartz sand

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Effect test

Embodiment 1

[0034] A certain quartz sand SiO 2 Grade 99.1942%, Al 2 o 3 Content 0.5242%, Fe 2 o 3 content of 0.1388%, first desliming the quartz sand less than 0.3mm, the desliming amount is 16.37wt%, and the bottom flow is the deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, and the bottom of the tank is flotation concentrate; then the flotation concentrate is subjected to deep desliming, the desliming amount is 5.12wt%, and the coarse-grained grade is deslimed concentrate ore; then the deslimed concentrate is fed into the strong magnetic sepa...

Embodiment 2

[0037] A certain quartz sand SiO 2 Grade 98.7701%, Al 2 o 3 Content 0.4983%, Fe 2 o 3 content of 0.2720%, desliming the quartz sand less than 0.3mm, the desliming amount is 10.00wt%, and the bottom flow is the deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, the bottom of the tank is flotation concentrate; then the flotation concentrate is deslimed in depth, the desliming amount is 5.00wt%, and the coarse-grained grade is desliming concentrate ore; then the deslimed concentrate is fed into the strong magnetic separator for magnetic ...

Embodiment 3

[0040] A certain quartz sand SiO 2 Grade 98.4813%, Al 2 o 3 Content 0.6897%, Fe 2 o 3 content of 0.3948%, desliming the quartz sand less than 0.3mm first, the desliming amount is 20.00wt%, and the bottom flow is deslimed sand; then the deslimed sand is fed into the flotation machine for reverse flotation, and the reverse flotation process is a rough selection 1. One-time selection, the dosage of rough selection pH regulator sulfuric acid is 1000g / t, the dosage of dispersant sodium hexametaphosphate is 1500g / t, and the collector is a combination of sodium oleate and dodecylamine, which are added separately, and the dosage is 5000g / t respectively , 800g / t, the amount of selected dodecylamine is 400g / t, and the bottom of the tank is flotation concentrate; then the flotation concentrate is deslimed deeply, the desliming amount is 10.00wt%, and the coarse-grained grade is deslimed concentrate ore; then the deslimed concentrate is fed into the strong magnetic separator for magne...

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Abstract

The invention discloses an ore dressing purifying method for high-purity quartz sand. The method comprises the following processes and steps: feeding raw material quartz sand with particle size less than or equal to 0.3mm and SiO2 content more than or equal to 98.0% into a desliming process; feeding the produced desliming sand into a flotation machine for reverse flotation; feeding the produced reverse flotation concentrate into a deep desliming operation; feeding the produced desliming concentrate into a high-intensity magnetic separator for high-intensity magnetic separation impurity-removing operation; concentrating the produced magnetic concentrate; feeding into a leaching tank containing an acidic solution, stirring and removing acid-soluble impurity elements from the magnetic concentrate; cleaning, grading, filtering and drying, thereby obtaining the high-purity quartz sand with SiO2 grade more than or equal to 99.95%. The ore dressing purifying method has the advantages of simple technological process, low production cost, capability of obtaining high purity of quartz sand products, and the like.

Description

technical field [0001] The invention belongs to a method for beneficiation and purification of non-metallic ore, in particular to a method for beneficiation and purification of high-purity quartz sand, which is used to prepare SiO 2 Quartz powder with a content higher than 99.95%, especially suitable for SiO 2 Quartz sand with grade ≥ 98.0% is used as raw material to prepare high-purity quartz sand. Background technique [0002] High-purity quartz sand generally refers to SiO 2 Quartz powder with a content higher than 99.95% is the main raw material for quartz glass and quartz crucible. Its high-grade products are widely used in large-scale and ultra-large-scale integrated circuits, optical fibers, solar cells, lasers, aerospace, military and other industries. Since these industries are related to the long-term development of the country and are a necessary condition for the sustainable development of high-tech in a country, the strategic position of high-purity quartz san...

Claims

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Application Information

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IPC IPC(8): C03C1/02B03B9/00B03D1/002B03D1/01B03D101/02
CPCB03B9/00B03D1/002B03D1/01B03D2201/005B03D2201/007B03D2201/02C03C1/022
Inventor 沈进杰高春庆骆洪振王海亮孙炳泉侯更合杨任新
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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