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Circular clean production method for yellow phosphorus with co-production of potassium salt, aluminium oxide, molecular sieve, blast furnace slag cement and architectural profile

A slag cement and clean production technology, applied in the chemical industry, can solve the problems of insufficient utilization of heat, inability to produce high-quality yellow phosphorus, and incompatibility with yellow phosphorus enterprises, and achieve outstanding economic benefits and energy-saving effects, and comprehensive production costs. The effect of thermal decomposition energy consumption and material consumption

Active Publication Date: 2016-01-06
黄钰雪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Circular clean production method for yellow phosphorus with co-production of potassium salt, aluminium oxide, molecular sieve, blast furnace slag cement and architectural profile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A company's phosphating factory has 3 yellow phosphorus electric furnaces, with capacities of 35000KVA, 31500KVA and 12500KVA respectively, with a total capacity of 79000KVA. with P 2 o 5 The content is 29.05%, SiO 2 content of 14.66%, CaO content of 42.03%, CO 2 Phosphorus concentrate pellets with a content of 2.39%, plus silica and coke to produce yellow phosphorus. The consumption of yellow phosphorus raw materials per ton is 8.48t of phosphorous concentrate pellets, 1.46t of coke and 1.91t of silica, and the power consumption is 14215kwh. The total annual consumption of phosphorous concentrate pellets is 300,000 tons, the production of yellow phosphorus is 35,385 tons, and the by-product of yellow phosphorus slag is 279,800 tons.

[0071] According to technical route (technical scheme) of the present invention, use K 2 O content is 13.0%, Na 2 Potassium feldspar particles (3-25 mm) with O content of 2.0% replace the added silica and combine with P 2 o 5 The ...

Embodiment 2

[0075] A phosphorus industry company has 2 yellow phosphorus electric furnaces with a capacity of 2×25000KVA. with P 2 o 5 The content is 29%, SiO 2 content of 11%, CaO content of 42%, CO 2 Phosphate rock (3-25mm) with a content of 10%, plus silica and coke to produce yellow phosphorus. The raw material consumption of yellow phosphorus per ton is 8.68t of phosphate rock, 1.69t of coke and 1.97t of silica, and the power consumption is 14893kwh. The total annual consumption of phosphate rock is 182,500 tons, the production of yellow phosphorus is 21,000 tons, and the by-product of yellow phosphorus slag is 167,000 tons.

[0076] According to technical route (technical scheme) of the present invention, use K 2 O content is 13.0%, Na 2 O content of 1.0% potassium feldspar particles (3 ~ 25mm) instead of silica, and with P 2 o 5 The content is 29%, 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 c...

Embodiment 3

[0080] A yellow phosphorus enterprise has a yellow phosphorus electric furnace with a capacity of 20,000KVA. with P 2 o 5 The content is 30.02%, SiO 2 content of 9.81%, CaO content of 42.03%, CO 2 Phosphorus concentrate pellets with a content of 2.39%, plus silica and coke to produce yellow phosphorus. The consumption of yellow phosphorus raw materials per ton is 8.20t of phosphorous concentrate pellets, 1.46t of coke and 2.27t of silica, and the power consumption is 14263kwh. The total annual consumption of phosphorus concentrate pellets is 80,000 tons, the production of yellow phosphorus is 9,750 tons, and the by-product of yellow phosphorus slag is 77,957 tons.

[0081] According to technical route (technical scheme) of the present invention, use K 2 O content is 14.0%, Na 2 Potassium feldspar particles (3-25mm) with O content of 1.3% replace the added silica and combine with P 2 o 5 The content is 30.02%, SiO 2 content of 9.81%, CaO content of 42.03%, CO 2 Phosph...

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Abstract

The invention relates to a circular clean production method for yellow phosphorus with co-production of potassium salt, aluminium oxide, a molecular sieve, blast furnace slag cement and an architectural profile. The method comprises two lines: 1, replacing externally added silica by potassium feldspar, and preparing high quality yellow phosphorus with phosphorite and coke nuts by virtue of an electric heating method; quenching yellow phosphorus slag, dissolving out KAlO2, filtering the mixture, introducing CO2, and precipitating Al(OH)3 and preparing a first filtrate; and carrying out temperature-controlled conversion on Al(OH)3 to obtain Al2O3. and 2, uniformly mixing potassium feldspar and Na2CO3, calcining the mixture with yellow phosphorus tail gas, and the leaching the mixture by water, introducing CO2, precipitating a silica-alumina gel body and preparing a second filtrate. then the line is divide into four using paths: (1) crystallizing the first and second filtrates in a centralized manner and drying the first and second filtrates to prepare K2CO3 and Na2CO3, returning Na2CO3 to a line 2 to be recycled, and continuously processing K2CO3 to potassium salt such as KH2PO4 and K2SO4 and the like; (2) carrying out hydrothermal crystallization on the unprecipitated silica-alumina gel body and the filtrate to prepare a molecular sieve; (3) preparing slag cement by the silica-alumina gel body and yellow phosphorus slag; and (4) preparing the architectural profile by the silica-alumina gel body and yellow phosphorus slag.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing yellow phosphorus and a product recycling process, in particular to a method for cyclically clean production of yellow phosphorus co-producing potassium salt, alumina, molecular sieve, slag cement and building profiles. 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 billio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/027C01F7/14C01D7/00C01B25/30C01D5/00C01B39/22C01B39/14C04B7/14C04B28/08C04B38/10
CPCY02P40/10
Inventor 黄钰雪
Owner 黄钰雪
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