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System and method for preparing superfine silicon dioxide by leaching silicate ores by using hydrogen chloride gas

A technology of ultra-fine silicon dioxide and hydrogen chloride gas, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of slow reaction and retention of silicate ore and acid leaching, and achieve improved dissolution efficiency and The effect of hydrochloric acid utilization

Pending Publication Date: 2019-06-07
YUANCHU TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, most of the research is still in the experimental research stage, and the leaching reaction of silicate ore and acid is slow, which requires high temperature and strong acid environment, and high-concentration hydrochloric acid volatilizes at high temperature

Method used

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  • System and method for preparing superfine silicon dioxide by leaching silicate ores by using hydrogen chloride gas
  • System and method for preparing superfine silicon dioxide by leaching silicate ores by using hydrogen chloride gas
  • System and method for preparing superfine silicon dioxide by leaching silicate ores by using hydrogen chloride gas

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Experimental program
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Effect test

Embodiment 1

[0050] figure 1 It is a schematic diagram of the preparation system according to the first embodiment of the present invention, and the system includes an ore raw material feeding device, an ejector 4 , a stirring tank 6 and a liquid-solid separation device 7 . Among them, the ore raw material feeding device includes a dust collector 1, a storage tank 2 and a powder quantitative conveying device 3 connected in sequence; a liquid inlet (not marked in the figure) and a liquid outlet (not marked in the figure) are provided on the ejector 4 and gas inlet (not marked in the figure); the liquid inlet of the jet device 4 is connected with a circulation pipeline 8 between the discharge port of the stirred tank 6, and the liquid outlet of the jet device 4 is connected with the circulating material inlet of the stirred tank 6; The bulk quantitative conveying device 3 feeds the raw material powder of silicate ore into the circulation pipeline 8 through a feeding pipe, and mixes it with t...

Embodiment 2

[0070] figure 2 It is a schematic diagram of the preparation system of the second embodiment of the present invention, its structure is the same as figure 1 The system shown is basically the same, the difference is that: the ore raw material feeding device also includes a premixing tank 11 connected with the powder quantitative delivery device 3, the slurry outlet and slurry inlet of the premixing tank 11 are respectively connected to the ejector 4 is connected with the circulation pipeline 8, and part of the material in the circulation pipeline 8 is introduced into the premix tank 11 through the circulation pump 5 to be premixed with the added silicate ore powder; the premixed slurry passes through the slurry The material outlet is input into the ejector 4. A slurry pump 5' is provided on the pipeline that the premix tank 11 communicates with the injector 4.

[0071] The working process of the preparation system of the second embodiment of the present invention is as follo...

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Abstract

The invention discloses a system and method for preparing superfine silicon dioxide by leaching silicate ores by using hydrogen chloride gas. In the system, a circulating material outlet of a stirringkettle communicates with a liquid inlet of an ejector through a circulating pipeline; a liquid outlet of the ejector communicates with a circulating material inlet of the stirring kettle; a materialoutlet of the ore raw material feeding device communicates with the circulating pipeline; the circulating pipeline is provided with a circulating pump; and a circulating material outlet of the stirring kettle communicates with a liquid-solid separation device. According to the system and method for preparing ultrafine silicon dioxide by leaching silicate ores by using hydrogen chloride gas, an industrial feasible scheme for continuously preparing silicon dioxide by leaching silicate ores is provided; the ejector is selected, and a mode that the hydrogen chloride gas is directly dissolved in silicate circulating slurry is adopted; and in addition, through preliminary contact of high-concentration high-dispersity slurry in the ejector with a high-concentration hydrochloric acid solution, dissolving efficiency of ores and the utilization rate of hydrochloric acid are greatly improved.

Description

technical field [0001] The invention relates to a system and method for preparing superfine silicon dioxide by leaching silicate ore with hydrogen chloride gas, belonging to the field of inorganic non-metallic materials. Background technique [0002] Ultrafine SiO 2 It has the characteristics of large specific surface area, porous, high temperature resistance, strong electrical insulation, good reinforcing effect and non-combustibility. It is widely used in coatings, plastics, medicine, biology, papermaking, rubber, agriculture, chemical industry, national defense and machinery widely used. Ultrafine SiO 2 There are many production processes, and the basic principles are only divided into gas phase method and precipitation method. Due to the simple process, stable production conditions, low cost and large output, the precipitation method is a method commonly used in industrial production at present. The current precipitation method is divided into traditional precipitatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/193
CPCC01B33/193C01P2004/61C01P2006/12C01P2006/19C01P2006/32B01J19/1881B01J2219/00103B01J2219/00108B01D11/028B01D36/00B01D21/26
Inventor 于常军王麒
Owner YUANCHU TECH (BEIJING) CO LTD