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Energy-saving method for co-production of potassium salt, sodium carbonate and alumina from yellow phosphorus

A technology of sodium carbonate and alumina, applied in the chemical industry, can solve problems such as insufficient use of heat, inability to produce high-quality yellow phosphorus, and failure to meet the requirements of yellow phosphorus enterprises, so as to achieve outstanding economic benefits and energy-saving effects, reduce overall production costs, and change Effects of Potassium Depleted Conditions

Active Publication Date: 2017-08-11
黄钰雪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technical scheme realizes the production of phosphoric acid and the co-production of alkaline fertilizer at the same time, but it cannot produce high-quality yellow phosphorus, and does not make full use of the heat generated in the production process, which is not suitable for yellow phosphorus enterprises to reduce production energy consumption and improve the comprehensive utilization of tail gas and slag. rate of demand

Method used

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  • Energy-saving method for co-production of potassium salt, sodium carbonate and alumina from yellow phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] with K 2 O content is 10.5%, Na 2 O content of 2.5% potassium feldspar particles (3 ~ 25mm), and P 2 o 5 content of 29%, SiO 2 content of 13%, CaO content of 41%, CO 2 Phosphate ore (3-25mm) with a content of 8% and coke (3-25mm) with a fixed carbon content of 80% are added to the yellow phosphorus electric furnace according to the ratio of phosphate rock: coke: potassium feldspar = 1000:194:250.

[0058] According to the method of the present invention, 10kt / a yellow phosphorus production plant can produce yellow phosphorus 10kt annually, K 2 CO 3 2.9 kt, Na 2 CO 3 0.53kt, Al 2 o 3 2.65kt. Among them, the production of K 2 CO 3 Capable of deep processing to generate 5.7kt of KH 2 PO 4 .

Embodiment 2

[0060] with K 2 O content is 13%, Na 2 O content of 1.0% potassium feldspar particles (3 ~ 25mm), and P 2 o 5 Content is 30%, SiO 2 content of 11%, CaO content of 42%, CO 2 Phosphate rock (3-25mm) with a content of 10% and coke (3-25mm) with a fixed carbon content of 80% are added to the yellow phosphorus electric furnace according to the ratio of phosphorite: coke: potassium feldspar = 1000:206:278.

[0061] According to the method of the present invention, 20kt / a yellow phosphorus production plant can produce yellow phosphorus 20kt annually, K 2 CO 3 7.3kt, Na 2 CO 3 0.43kt, Al 2 o 3 5.8kt. Among them, the production of K 2 CO 3 Capable of deep processing to generate 14kt of KH 2 PO 4 .

Embodiment 3

[0063] with K 2 O content is 14%, Na 2 Potassium feldspar powder with a small amount of O content, and P 2 o 5 Content is 30%, SiO 2 content of 11%, CaO content of 42%, CO 2 Phosphate concentrate pellets (15-25mm) with a content of 2.5%, and coke (3-25mm) with a fixed carbon content of 80%, add yellow phosphorus according to the ratio of phosphate rock: coke: potassium feldspar = 1000:179:288 electric stove.

[0064] According to the method of the present invention, the 8kt / a yellow phosphorus production device can realize the annual production of yellow phosphorus 8kt, K 2 CO 3 3.14kt, Al 2 o 3 2.3kt. Among them, the production of K 2 CO 3 Capable of deep processing to generate 6.2kt of KH 2 PO 4 .

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Abstract

The present invention relates to an energy-saving method for co-producing a potassium salt, sodium carbonate and alumina by yellow phosphorus. The method comprises: using potassium feldspar to replace silica, adding the potassium feldspar into a yellow phosphorus electric furnace together with phosphate ores and coke nuts, and carrying out reaction to obtain furnace gas containing P2; performing water washing on the furnace gas, then collecting crude phosphorous and refining the crude phosphorous to obtain the yellow phosphorus with a good quality; water-quenching yellow phosphorus slag, then removing the slag and stripping KAlO2, then carrying out filtration, adding CO2, precipitating Al(OH)3 and obtaining a water quenched filtrate, wherein the Al(OH)3 is subjected to a temperature controlled conversion to obtain Al2O3; and the water quenched filtrate is subjected to crystallization separation and drying, and therefore K2CO3 and Na2CO3 are obtained. According to the method provided by the present invention, a yellow phosphorus producing apparatus is modified to an integrated system for producing the yellow phosphorus and thermally decomposing the potassium feldspar by an electrothermal method; and the apparatus is generally applicable for upgrading transformation of the yellow phosphorus electric furnace with a traditional electrothermal method; and therefore production energy consumption and production costs are greatly reduced; product categories and an added value are increased; environmental pollution is reduced; and the apparatus is provided with an outstanding economic benefit and an environmental protection effect.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an energy-saving method for co-producing potassium salt, sodium carbonate and alumina from yellow phosphorus. Background technique [0002] Feldspar is an aluminosilicate mineral of potassium, sodium, calcium and other alkali metals or alkaline earth metals, also called feldspar minerals. Potassium feldspar (K 2 O·Al 2 o 3 ·6SiO2 2 ) is also commonly called orthoclase. Potassium feldspar series are mainly orthoclase, microcline feldspar, striped feldspar and so on. [0003] Potassium feldspar is a water-insoluble potassium resource with high potassium content, the widest distribution and the largest reserves. There are 60 sources of potassium feldspar, the average potassium oxide content is about 11.63%, and its reserves are about 7.914 billion tons, which is converted into about 920 million tons of potassium oxide reserves based on the average content. Potassium feldspars...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/027C01F7/14C01D7/00C01B25/30
CPCY02P20/10
Inventor 黄钰雪
Owner 黄钰雪
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