Fluosilicic acid concentration method and device

A technology of fluosilicic acid and concentration tower, which is applied in the direction of fluosilicic acid and silicon halide compounds, which can solve the problems of high impurity content and low concentration of fluosilicic acid, and achieve the effect of meeting product performance requirements

Pending Publication Date: 2019-09-17
威海恒邦化工有限公司
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Problems solved by technology

[0005] In order to solve the technical problems of low concentration and high impurity content of the existing fluosilicic acid,...

Method used

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  • Fluosilicic acid concentration method and device

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, so that those skilled in the art of the present invention can easily implement the present invention.

[0020] like figure 1 As shown, the present invention provides a device for concentrating fluosilicic acid, which is used to concentrate low-concentration fluosilicic acid by-products of phosphate fertilizers to obtain high-concentration fluosilicic acid products. The present invention includes sequentially connected concentrating equipment, purification equipment and storage equipment, the front end of the concentration equipment is also connected to the separation equipment 100 and the heating equipment.

[0021] Separation equipment 100 is used to pretreat and separate silica gel with low-concentration fluosilicic acid. The low-concentration fluosilicic acid inlet 101 is fed with low-concentration fluosilicic acid. The separation of silica gel in low-...

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Abstract

The invention relates to a fluosilicic acid concentration method and device and solves the technical problems of slightly low concentration and high impurity content of existing fluosilicic acid. The fluosilicic acid concentration device is provided with separation equipment used for separating silica gel in fluosilicic acid, heating equipment used for heating air, concentration equipment used for concentrating the fluosilicic acid and purification equipment used for removing arsenic and mechanical impurities; the front end of the concentration equipment respectively communicates with the separation equipment and the heating equipment; and the rear end of the concentration equipment communicates with the purification equipment. The fluosilicic acid concentration device can be widely applied to concentration and recovery of low-concentration fluosilicic acid.

Description

technical field [0001] The invention relates to a method and device for concentrating compounds containing silicon, fluorine and other elements, in particular to a method for concentrating and recovering low-concentration fluorosilicate by-products in the phosphoric acid production process in the phosphate fertilizer industry, or for extracting low-concentration fluorosilicate from other industries. concentrated recovery. Background technique [0002] In the production process of wet-process phosphoric acid, the phosphate rock used contains 2.5-3.0% fluorine. During the process of decomposing phosphate rock with concentrated acid, silicon tetrafluoride gas is produced, most of which are directly absorbed by the reaction liquid phase to form various fluorides. , into dilute phosphoric acid or phosphogypsum. About 10% of silicon tetrafluoride gas will escape from the reaction liquid phase, and after multi-stage water washing and absorption, it will generate 5-25% low-concentr...

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Application Information

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IPC IPC(8): C01B33/10
CPCC01B33/103
Inventor 孙瑞涛曹辉王磊陈思涛
Owner 威海恒邦化工有限公司
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