Potash feldspar utilization method

A technology for potassium feldspar and phosphate rock is applied in the field of utilization of ore resources, and can solve the problems of low potassium oxide content, difficult processing and utilization, and not being well developed and utilized.

Active Publication Date: 2014-07-09
CHENGDU INTERMENT TECH
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  • Abstract
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Problems solved by technology

However, due to the low content of potassium oxide in potassium feldspar, it is

Method used

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  • Potash feldspar utilization method

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Embodiment 1

[0011] Crushing potassium feldspar, phosphate rock, limestone, dolomite and coke, sieving particle size 3-35mm, according to potassium feldspar 18.3% (weight), phosphate rock 24.2% (weight), limestone 16.7% (weight), dolomite 16.6% (weight) of stone and 24.2% (weight) of coke are put into the electric furnace for reaction, and the weight percentage of phosphorus in phosphate rock is P 2 o 5 Calculated as about 20%, the weight percentage of potassium in potassium feldspar is expressed in K 2 O is calculated as about 15%, the electric furnace gas is controlled at 220-250°C for dust collection, the separated yellow phosphorus gas is used to produce phosphoric acid, and then the slag produced by the electric furnace 100, recovered potassium carbonate and produced phosphoric acid are stirred and mixed Reaction, the pH value of the liquid phase at the end of the reaction is controlled at 8.5-9, the temperature is controlled at 120-124 ° C, the liquid phase after the reaction is con...

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Abstract

The invention discloses a potash feldspar utilization method by using which dipotassium phosphate can be prepared from potash feldspar, and meanwhile, other valuable byproducts can be prepared. The method comprises the steps of (1) crushing raw materials including potash feldspar, phosphate ore, limestone, dolomite and coke, mixing the raw materials, then, placing the mixture into an electric furnace to react, and discharging potassium carbonate generated in the reaction process out of the electric furnace along with yellow phosphorus gas; (2) collecting dust in a way that the temperature of the furnace gas is kept to be higher than the dew point temperature of yellow phosphorus and lower than the boiling temperature of potassium carbonate, and enabling the yellow phosphorus gas obtained through gas-solid separation to enter a subsequent phosphoric acid preparation process; (3) respectively transferring furnace slag generated by the electric furnace, recovered potassium carbonate and prepared phosphoric acid to the same reaction vessel to stir, mix and react, concentrating and filtering a liquid phase obtained after the reaction, then, crystallizing filtrate and dehydrating to obtain a dipotassium phosphate product, and dehydrating lower slurry obtained after the reaction to obtain a calcium hydrogen phosphate and magnesium hydrogen phosphate contained compound.

Description

technical field [0001] The invention relates to a utilization method of ore resources, in particular to a utilization method of potassium feldspar. Background technique [0002] Potassium resources in my country are poor, and potassium salt reserves only account for 0.09% of the world's proven reserves. However, my country has abundant and widely distributed potassium feldspar sources. If these potassium feldspars can be utilized, it can make up for the serious shortage of potassium resources in my country. insufficient. However, due to the low content of potassium oxide in potassium feldspar, it is difficult to process and utilize, so it has not been well developed and utilized. At present, a variety of technological researches have been carried out on the extraction of potassium from potassium feldspar at home and abroad, which can be divided into: blast furnace smelting method, hot pressing method, open leaching and closed constant temperature method, thermal decompositio...

Claims

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Application Information

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IPC IPC(8): C01B25/30C01B25/32C01B25/34
Inventor 高麟汪涛樊彬
Owner CHENGDU INTERMENT TECH
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