Method for extracting soluble potassium sulfate by using orthoclase

A technology of orthoclase and potassium sulfate, applied in the direction of sulfate/bisulfate preparation, etc., can solve the problems of low added value of products, long process flow, poor economic benefits, etc., to achieve increased yield, reasonable process, and improved decomposition rate effect

Inactive Publication Date: 2014-04-09
BLUESTAR LEHIGH ENG INST CO LTD
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Problems solved by technology

The traditional method has long process flow, high energy con

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  • Method for extracting soluble potassium sulfate by using orthoclase

Examples

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Embodiment 1

[0023] Example 1, a method for extracting soluble potassium sulfate with orthoclase. After pulverizing and mixing orthoclase, limestone, phosphogypsum, and roasting aids, the soluble potassium sulfate is obtained through high-temperature roasting, crushing, leaching, and evaporation processes. Potassium sulfate product crystallization;

[0024] The weight ratio of limestone, orthoclase and phosphogypsum is 0.5:1:0.2;

[0025] Roasting aid weight is 0.1% of orthoclase;

[0026] The roasting aid is selected from one of potassium sulfate, sodium sulfate, and fluorite;

[0027] The temperature of the high-temperature calcination is 500°C.

Embodiment 2

[0028] Embodiment 2, a method for extracting soluble potassium sulfate with orthoclase, after pulverizing and mixing orthoclase, limestone, phosphogypsum, and roasting aids, then undergoing high-temperature roasting, crushing, leaching, and evaporation processes to obtain soluble potassium sulfate Potassium sulfate product crystallization;

[0029] The weight ratio of limestone, orthoclase and phosphogypsum is 4.9:1:2.5;

[0030] Roasting aid weight is 20% of orthoclase;

[0031] The roasting aid is selected from one of potassium sulfate, sodium sulfate, and fluorite;

[0032] The temperature of high temperature calcination is 1200°C.

Embodiment 3

[0033] Example 3, a method for extracting soluble potassium sulfate with orthoclase. After pulverizing and mixing orthoclase, limestone, phosphogypsum, and roasting aids, the soluble potassium sulfate is obtained through high-temperature roasting, crushing, leaching, and evaporation processes. Potassium sulfate product crystallization;

[0034] The weight ratio of limestone, orthoclase and phosphogypsum is 1.5:1:1.0;

[0035] Roasting aid weight is 5% of orthoclase;

[0036] The roasting aid is selected from one of potassium sulfate, sodium sulfate, and fluorite;

[0037] The temperature of the high-temperature calcination is 850°C.

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Abstract

The invention relates to a method for extracting soluble potassium sulfate by using orthoclase. The method comprises the following steps: smashing and uniformly mixing the orthoclase, limestone, ardealite and a roasting auxiliary, roasting at the high temperature of 500-1200 DEG C, smashing, leaching and evaporating to obtain crystals of the soluble potassium sulfate product, wherein the weight ratio of the limestone to the orthoclase to the ardealite is (0.5-4.9):1:(0.2-2.5); the weight of the roasting auxiliary accounts for 0.1-20% of the weight of the orthoclase; the roasting auxiliary is a mixture of one or more of potassium sulfate, sodium sulfate and fluorite. The method disclosed by the invention is relatively reasonable in process and strong in operability and has the advantages that the decomposition rate of the orthoclase can be effectively increased, thus the yield of potassium is increased; SiO2, Al2O3 and K2O components in the orthoclase are comprehensively utilized for producing high value-added products; the purposes of high resource utilization rate, low energy consumption and good environment compatibility are achieved.

Description

technical field [0001] The invention belongs to the field of mineral deep processing, in particular to a method for extracting soluble potassium sulfate with orthoclase. Background technique [0002] Orthoclase belongs to the monoclinic system and is a framework silicate mineral with the molecular formula K[AlSi 3 o 8 ], the theoretical chemical composition is K 2 O (16.9%), Al 2 o 3 (18.4%), SiO 2 (64.7%). Both aluminum and silicon in orthoclase form a coordination tetrahedron with oxygen, forming a firm tetrahedral network structure. Its chemical properties are extremely stable, and it will not be decomposed by any acid or alkali at room temperature except hydrofluoric acid. [0003] Water-soluble potassium salt resources are abundant in foreign countries, so the research work on making potash fertilizer from orthoclase is relatively less. Japan has used high temperature and high pressure alkali dissolution method to decompose orthoclase, and the United States has ...

Claims

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Application Information

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IPC IPC(8): C01D5/10
Inventor 云干董自斌李学字刘娟程辉王克云
Owner BLUESTAR LEHIGH ENG INST CO LTD
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