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Method for preparing phosphoric acid from phosphorus block ore by wet method and extracting rare earth from phosphorus block ore

A process method, the technology of phosphorite, applied in the direction of rare earth metal compounds, chemical instruments and methods, phosphorus compounds, etc., to achieve the effect of easy industrial production and low cost

Inactive Publication Date: 2010-07-21
贵州蓝天科大矿业发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the rare earth elements are concentrated in collophosphine and apatite. According to the technological characteristics of the ore, the rational use of mineral resources and the appropriate mineral cleaning treatment process have not been reported.

Method used

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  • Method for preparing phosphoric acid from phosphorus block ore by wet method and extracting rare earth from phosphorus block ore
  • Method for preparing phosphoric acid from phosphorus block ore by wet method and extracting rare earth from phosphorus block ore
  • Method for preparing phosphoric acid from phosphorus block ore by wet method and extracting rare earth from phosphorus block ore

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Unless otherwise specified, the percentages involved in the following examples are all mass percentages.

[0032] Follow the steps below:

[0033] (1). According to the conventional wet-process phosphoric acid production process, take 10Kg of phosphorite concentrate, crush it to 100 mesh, and add it at a reaction temperature of 75±5°C at a liquid-solid ratio (mass ratio) of 2.4:1 24kg of phosphoric acid with a concentration of 23% was reacted, and the reaction time was 2 hours; then, concentrated sulfuric acid with a concentration of at least 97% was added to continue the reaction, and the amount added was until the SO in the liquid phase 3 The concentration is 35±2g / L, and the reaction time is 5 hours. After the reaction is complete, filter to obtain crude phosphoric acid and phosphogypsum. The crude phosphoric acid solution concentration (P 2 o 5 ) is 27%; concentrate decomposition rate is 98%; P 2 o 5 The extraction rate is 96%; the extraction rate of rare earth...

Embodiment 2

[0048] Follow the steps below:

[0049] Step (1) According to the process of conventional wet phosphoric acid production, take 20Kg of phosphorite concentrate, crush it to 100 mesh, and add 48kg of concentrated ore at a reaction temperature of 80°C at a ratio of 2.4:1 to liquid-solid ratio (mass ratio). React for 21wt% phosphoric acid, and the reaction time is about 2 hours; then add concentration and be at least 97% concentrated sulfuric acid to continue the reaction, and the amount of addition is until wherein the SO concentration in the liquid phase is 35 ± 2g / L, and the reaction time is about 5 hours. After the reaction is complete, filter to obtain crude phosphoric acid and phosphogypsum. The concentration of the crude phosphoric acid solution obtained through the reaction is 27.5%; the decomposition rate of the concentrate is 98%; P 2 o 5 The extraction rate is 95.7%; the extraction rate of rare earth oxide is 39.1%.

[0050] (2) The crude phosphoric acid solution obt...

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Abstract

The invention relates to a technique method of preparation of phosphoric acid by wet process that takes phosphorite mine as raw material and extracting rare earth from the phosphoric acid, which pertains to the project field of inorganic chemistry. By the improvement on the existing technique of extracting phosphoric acid by wet process, the technique process of the invention can further treat the phosphoric acid and obtains the precipitation of rare earth phosphate, thereby further extracting the rare earth. At the same time, phosphogypsum in the prior art is lixiviated by dilute sulfuric acid so as to realize the purpose of extracting the rare earth. The invention has the advantages that the lanthanon in mine is fully recycled with comparatively low cost during the production course of phosphorite mine, which is easy to realize industrial production.

Description

technical field [0001] The invention belongs to the field of inorganic chemical engineering, and relates to a process method for preparing phosphoric acid by wet method and extracting rare earth from phosphorite ore as raw material. Background technique [0002] Phosphorus is an important non-metallic mineral resource that is difficult to regenerate, and it is also one of the most important elements in life. It not only has important application value in many industries, but also plays an important role in agriculture, medicine, and biology. . my country's phosphate rock reserves rank third in the world. At present, the proven phosphate rock resource reserves are about 16.8 billion tons, but the real usable mineral resources that can meet the current mining and production requirements, that is, the basic reserves are only 4 billion tons ( standard ore), and the industrial reserves after deducting the design loss and mining loss are only 2.1 billion tons. my country's phosph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/232C01F11/46C01F17/00
Inventor 鲁毅强杨启山杨武成曹艳秋高丽娟张长鑫
Owner 贵州蓝天科大矿业发展有限公司