Process for extracting silicon fertilizer from fluorite waste liquid

A waste liquid and fluorite technology, applied in the direction of ammonium fluoride, ammonium halide, etc., can solve the problems that various elements of fluorite waste liquid cannot be fully utilized, waste, environmental pollution, etc., and achieve outstanding substantive features and equipment requirements The effect of low, mild reaction conditions

Active Publication Date: 2017-12-08
河南绿能环保科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the processing and extraction technology of fluorite is mainly obtained by flotation of fluorite raw ore. The main components of fluorite raw ore are calcium fluoride, calcium oxide, silicon dioxide, magnesium oxide, aluminum oxide, iron, copper, lead , zinc, aluminum and rare earth element oxides, etc. The direct discharge of fluorite waste liquid after flotation to extract calcium fluoride from fluorite raw ore will not only cause environmental pollution, but also the various elements in fluorite waste liquid cannot be fully utilized. It also caused a lot of waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of technique that extracts silicon fertilizer from fluorite waste liquid, it comprises the following steps:

[0020] According to the mass ratio of acetic acid and fluorite waste liquid as 2:98, first add acetic acid to the fluorite waste liquid, and then heat and concentrate at 100-150°C to obtain mixed gas and mixed solid, wherein the mixed gas is mainly It is hydrogen fluoride and silicon fluoride, and the mixed solids are mainly potassium, sodium, iron, aluminum, silicon, calcium, copper oxides and oxides of rare earth elements; the fluorite waste liquid is mainly acetate and silicate mixed suspension with rare earth oxides;

[0021] The mixed gas product is dissolved in water, filtered, and the filtrate enters the ammonium solution liquid-phase absorption system, adjusted to pH ≈ 9, stirred at 25-60°C for 0.5 h, and filtered to obtain an ammonium fluoride solution.

[0022] The mixed solids were ground and passed through a 200-mesh sieve to obtain mixed sol...

Embodiment 2

[0026] A kind of technique that extracts silicon fertilizer from fluorite waste liquid, it comprises the following steps:

[0027] According to the mass ratio of acetic acid and fluorite waste liquid as 3:97, first add acetic acid to the fluorite waste liquid, and then heat and concentrate at 100-150°C to obtain mixed gas and mixed solid, wherein the mixed gas is mainly It is hydrogen fluoride and silicon fluoride, and the mixed solids are mainly potassium, sodium, iron, aluminum, silicon, calcium, copper oxides and oxides of rare earth elements; the fluorite waste liquid is mainly acetate and silicate mixed suspension with rare earth oxides;

[0028] The mixed gas product was dissolved in water, filtered, and the filtrate entered the ammonium solution liquid-phase absorption system, adjusted to pH ≈ 9, stirred at 25-60°C for 1 h, and filtered to obtain an ammonium fluoride solution.

[0029] The mixed solids were ground and passed through a 200-mesh sieve to obtain mixed sol...

Embodiment 3

[0033] A kind of technique that extracts silicon fertilizer from fluorite waste liquid, it comprises the following steps:

[0034] According to the mass ratio of acetic acid and fluorite waste liquid being 4:96, first add acetic acid to the fluorite waste liquid, and then heat and concentrate at 100-150°C to obtain mixed gas and mixed solid, wherein the mixed gas is mainly It is hydrogen fluoride and silicon fluoride, and the mixed solids are mainly potassium, sodium, iron, aluminum, silicon, calcium, copper oxides and oxides of rare earth elements; the fluorite waste liquid is mainly acetate and silicate mixed suspension with rare earth oxides;

[0035] Dissolve the mixed gas product in water, filter, and the filtrate enters the ammonia solution liquid-phase absorption system, adjust the pH to 9, stir at 25-60°C for 2 h, and filter to obtain a white carbon black and ammonium fluoride solution.

[0036] The mixed solids were ground and passed through a 200-mesh sieve to obtai...

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Abstract

The invention provides a process for extracting a silicon fertilizer from fluorite waste liquid. The process comprises the following steps: heating and concentrating the fluorite waste liquid at 100-150 DEG C, so as to obtain mixed gas and a mixed solid; grinding the mixed solid, and sieving by virtue of a 200-mesh sieve, so as to obtain mixed solid powder; carrying out cyclone separation on the mixed solid powder, so as to obtain a silicon-containing mixture; and carrying out magnetic separation on the silicon-containing mixture, so as to obtain the silicon fertilizer finished product. The method has the beneficial effects that elements such as potassium, sodium, silicon and fluorine in the fluorite waste liquid can be adequately utilized, so that the production cost of fluorite is lowered; meanwhile, the environmental pollution caused by direct emission of the fluorite waste liquid is avoided; the method is simple, feasible and suitable for large-scale application.

Description

technical field [0001] The invention relates, in particular, to a process for extracting silicon fertilizer from fluorite waste liquid. Background technique [0002] Fluorite is widely used in various industrial fields. It can not only be used as a flux and slagging agent in ironmaking, steelmaking and ferroalloy production, but also as a raw material for cryolite production. It is also one of the basic raw materials for fluorine chemical industry. At the same time, Fluorite also plays a major role in the smelting of non-ferrous metals and the production of cement, glass and ceramics. [0003] At present, the processing and extraction technology of fluorite is mainly obtained by flotation of fluorite raw ore. The main components of fluorite raw ore are calcium fluoride, calcium oxide, silicon dioxide, magnesium oxide, aluminum oxide, iron, copper, lead , zinc, aluminum and rare earth element oxides, etc. The direct discharge of fluorite waste liquid after flotation to extra...

Claims

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Application Information

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IPC IPC(8): C05D9/02C01C1/16
CPCC01C1/162C05D9/02
Inventor 韩志同韩勇韩猛
Owner 河南绿能环保科技有限公司
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