A kind of method utilizing vein quartz tailings to prepare tft-lcd silica powder

A technology of quartz tailings and silicon micropowder, which is applied in the field of preparing TFT-LCD silicon micropowder, which can solve the problems of affecting the environment, high impurity content, and difficulty in effective application, and achieves the effect of reducing manufacturing costs and improving yield

Active Publication Date: 2019-07-16
凯盛石英材料(黄山)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings contain high impurities such as Al, Fe, Ca, K, Na, etc., and the particle size distribution is unreasonable, so it is difficult to be effectively used. Most factories only carry out simple storage and sell them at a low price, which restricts the environment while affecting the environment. Sustainable Development of Enterprises

Method used

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  • A kind of method utilizing vein quartz tailings to prepare tft-lcd silica powder
  • A kind of method utilizing vein quartz tailings to prepare tft-lcd silica powder
  • A kind of method utilizing vein quartz tailings to prepare tft-lcd silica powder

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Embodiment Construction

[0029] Such as figure 1 Shown, the present invention provides a kind of method utilizing vein quartz tailings to prepare TFT-LCD silica powder, comprises the following steps:

[0030] S1, pulp mixing

[0031] Send the vein quartz tailings into the slurry tank, and add anion and cation mixed collectors and industrial grade H to the slurry tank 2 SO 4 For pulping, the mass concentration of pulping is controlled at 40-60%, and the pH value is controlled at 1.5-2.5; H 2 SO 4 The dosage is 1.75kg / t, and the dosage of anion-cation mixed collector is 1.5~3.5kg / t;

[0032] S2, flotation

[0033] The quartz tailing mortar after pulping is sent to the flotation machine for reverse flotation. The mass concentration of the flotation slurry is controlled at 20-30%, the pH value is controlled at 1.5-3.5, and the flotation time is 5-10min to remove the floating content in the form of foam. Impurity minerals such as feldspar, mica, hornblende, clay and other impurity minerals with high ...

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Abstract

The invention discloses a method for preparing TFT-LCD silicon micro powder through vein quartz tailings. The method comprises the steps of S1, preparing pulp, wherein the quartz tailings are sent into a pulp preparing bucket, and an anion-cation mixed collecting agent and industrial grade H2SO4 are added into the pulp preparing bucket to prepare the pulp; S2, conducting flotation, wherein impurity minerals which floats in the form of foams are removed; S3, agent removing, wherein agent water in mortar after flotation is removed through a screw sand washer; S4, washing, wherein water is added into the mortar after agent removing to be cleaned; S5, dehydrating; S6, drying; S7, magnetic separation, wherein ferromagnetic minerals are further removed; S8, ball grinding and classification, wherein fine sand after treatment in the step S7 is sent into a non-mineral ball grinding machine for mineral grinding, meanwhile, two classifiers are adopted in sequence for classification, coarse sand which is classified by the first classifier and is bigger than 74 micrometers in particle size is returned to the non-mineral ball grinding machine for secondary mineral grinding, fine sand which is classified by the second classifier and is smaller than 45 micrometers in particle size is cut off, and therefore the TFT-LCD silicon micro powder of which the particle size is 45-74 micrometers is obtained.

Description

technical field [0001] The invention relates to the technical field of deep processing of non-metallic minerals, in particular to a method for preparing TFT-LCD silicon micropowder by utilizing vein quartz tailings. Background technique [0002] TFT-LCD is currently the mainstream in the field of liquid crystal flat panel display, and it is an industry supported by the state. Liquid crystal glass substrate is the basic raw material of TFT-LCD, and its performance has an important impact on the industry. In TFT glass substrates, SiO 2 It is the most important structural element (accounting for 58-63%), which can reduce the thermal expansion coefficient of glass and improve the thermal stability, chemical stability and mechanical strength of glass. Introducing SiO 2 The most important is the raw material of quartz powder, and its basic requirements include two aspects: chemical composition and particle size control. The current domestic market demand is about 50,000-100,00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C1/02
CPCC03C1/02C03C1/022
Inventor 陈志强段树桐吴建新杜祥国钱潜李佩悦
Owner 凯盛石英材料(黄山)有限公司
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