Improved process of preparing potassium sulfate with bittern containing potassium and magnesium sulfite

A magnesium sulfate isoform, potassium sulfate technology, applied in the directions of alkali metal sulfite/sulfite, chemical instruments and methods, alkali metal compounds, etc., can solve the problem of large process water consumption, the quality of potassium sulfate cannot be guaranteed, Problems such as low comprehensive recovery rate of ions, etc., to achieve the effect of simple process
CN1810644AActive Publication Date: 2006-08-02SDIC XINJIANG LUOBUPO POTASH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SDIC XINJIANG LUOBUPO POTASH CO LTD
Publication Date
2006-08-02

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Abstract

The improved process of preparing potassium sulfate with bittern containing potassium and magnesium sulfite includes the following steps: 1. tedding bittern to obtain mixed potassium salt; 2. crushing and milling; 3. mixing the mixed potassium salt with fresh water or slight salty water in the weight ratio of 1 to 0.2-0.5 to prepare the first slurry and the first conversion reaction; 4. mixing the first converted slurry and floating chemical for floating to obtain solid concentrated mineral; 5. mixing the solid concentrated mineral and fresh water or slight salty water in the weight ratio of 1 to 1.0-1.5 to prepare the second slurry and the second conversion reaction; and 6. solid-liquid separation of the second converted slurry to obtain wet potassium sulfate and drying to obtain dry potassium sulfate product. The technological process has high stability, low water consumption, low mineral consumption, high comprehensive potassium ion recovering rate and low insoluble matter content in the product.
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Description

technical field

[0001] The present invention relates to an improved method for preparing potassium sulfate, in particular to an improved method for preparing potassium sulfate with potassium-containing magnesium sulfate subtype brine. Background technique

[0002] Application number is 200410038989.1, and the name is called " a kind of method for producing potassium sulfate with potassium mixed salt " Chinese invention patent application discloses a kind of method that prepares potassium sulfate with potassium-containing magnesium sulfate subtype brine, and this existing method exists The following defects:

[0003] 1. The process stability is poor; this existing method has carried out two pilot tests, respectively with the potassium mixed salt made in spring and autumn winter and the potassium mixed salt made in summer as raw material potassium mixed salt, the process index drawn is completely different, the former The indicators are very poor, the comprehensive recovery r...

Claims

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