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Recycling and clean production method for preparing yellow phosphorus, sylvite, aluminum oxide, molecular sieves, slag cement and architectural profiles through potassium-bearing phosphorite

A technology of slag cement and molecular sieve, applied in the field of phosphorus chemical industry, can solve the problems of not conforming to yellow phosphorus enterprises, not making full use of heat, and not being able to produce high-quality yellow phosphorus.

Active Publication Date: 2015-12-30
黄钰雪
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  • 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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  • Recycling and clean production method for preparing yellow phosphorus, sylvite, aluminum oxide, molecular sieves, slag cement and architectural profiles through potassium-bearing phosphorite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A potassium-containing phosphate mining enterprise has 5 sets of yellow phosphorus electric furnaces with a capacity of 5×20000KVA. Its potassium phosphate rock P 2 o 5 content of 17%, SiO 2 content of 28%, CaO content of 35%, CO 2 The content is 3.9%, K 2 O content is 5%, Na 2 O content is trace. P obtained after beneficiation 2 o 5 content of 23%, SiO 2 content of 12%, CaO content of 32%, CO 2 The content is 3.9%, K 2 O content is 2.9%, Na 2 Potassium-containing phosphate ore concentrate with a small amount of O content.

[0075] According to the method of the invention, the potassium-containing phosphate ore concentrate is used to form pellets, and the yellow phosphorus tail gas is used to dry, consolidate into pellets and coke to produce yellow phosphorus. The ratio of the yellow phosphorus electric furnace is potassium-containing phosphate ore concentrate pellets: coke diced = 1000:145. The slag is quenched with water to remove the slag, and the filtra...

Embodiment 2

[0079] A factory has 1 yellow phosphorus electric furnace with a capacity of 1×20000KVA.

[0080] According to the method of the present invention, with P 2 o 5 content of 20.5%, SiO 2 content of 22.2%, CaO content of 33.0%, K 2 O content is 1.89%, Na 2 O content is 0.44%, CO 2 Potassium-containing phosphate rock (15-25mm) with a content of 4.0% and coke (3-25mm) with a fixed carbon content of 80% are added to the yellow phosphorus electric furnace according to the ratio of potassium-containing phosphate rock: coke diced = 1000:131.5. The slag is quenched with water to remove the slag, and the filtrate is used for later use. Potassium feldspar concentrate K selected from potassium-containing phosphate rock 2 O content is 14.5%, Na 2 O content is a trace amount of potassium feldspar powder and Na 2 CO 3 Mixed according to 1:0.92, after 5 seconds high-temperature rapid calcination, calcination temperature 830 ℃, 800 ℃ constant temperature 2h, after leaching, into CO 2 ...

Embodiment 3

[0084] A company has 2 yellow phosphorus electric furnaces with a capacity of 2×20000KVA.

[0085] According to the method of the present invention, with P 2 o 5 content of 19.5%, SiO 2 content of 22.2%, CaO content of 33.0%, K 2 O content is 2.2%, Na 2 O content is 0.10%, CO 2 Potassium-containing phosphate rock (15-25mm) with a content of 4.0% and coke (3-25mm) with a fixed carbon content of 80% are added to the yellow phosphorus electric furnace according to the ratio of potassium-containing phosphate rock: coke diced = 1000:125.6. The slag is quenched with water to remove the slag, and the filtrate is used for later use. Potassium feldspar concentrate K selected from potassium-containing phosphate rock 2 O content is 15%, Na 2 Potassium feldspar powder with 1% O content and Na 2 CO 3 Mixed according to 1:0.92, after 5 seconds high-temperature rapid calcination, calcination temperature 830 ℃, 800 ℃ constant temperature 2h, after leaching, into CO 2 , to precipitat...

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Abstract

The invention relates to a recycling and clean production method for preparing yellow phosphorus, sylvite, aluminum oxide, molecular sieves, slag cement and architectural profiles through potassium-bearing phosphorite. The method utilizes two routes, for the first route, high quality yellow phosphorus is produced by the potassium-bearing phosphorite and coke nuts through an electrothermal method, water quenching is conducted on yellow phosphorus slags, KAlO2 is dissolved out, filtration is conducted, CO2 is introduced, Al(OH)3 is settled, first filtrate is obtained, and the Al(OH)3 is converted through temperature control to obtain Al2O3. For the second route, orthoclase power and Na2CO3 are evenly mixed, roasting is conducted through yellow phosphorus tail gas, water leaching is conducted through water, the CO2 is introduced to settle out silicon-aluminum colloid, and second filtrate is obtained. Crystallization and drying are conducted on the first filtrate and the second filtrate, and K2CO3 and Na2CO3 are obtained. The Na2CO3 returns to the second route to be recycled. The content of K2O, Na2O, SiO2 and Al2O3 is adjusted for partial silicon-aluminum colloid which is not subjected to sedimentation and the filtrate, hydrothermal crystallization reaction is conducted, and the molecular sieves are obtained; settled silicon-aluminum colloid is mixed with the yellow phosphorus slags to prepare the slag cement and / or the architectural profiles.

Description

technical field [0001] The invention relates to the field of phosphorus chemical industry, in particular to a cyclic and clean production method for preparing yellow phosphorus, potassium salt, alumina, molecular sieve, slag cement and building profiles from potassium-containing phosphate rock. Background technique [0002] Potassium-bearing phosphate ore is a kind of marine sedimentary potassium-containing phosphate ore deposit mainly composed of terrigenous clastics. It is mainly distributed in Hanyuan to Ganluo in Sichuan, around Dianchi Lake in Yunnan, Yichang in Hubei and other places. [0003] Sichuan Hanyuan type potassium-containing phosphate rocks are mainly distributed in Hanyuan Wanli, Shirong, Shuitonggou, Ganluoxinjigu, Tianba, Mawogou and other areas. The potassium-bearing phosphorite strata belong to the lower part of the Qiongzhusi Formation. The phosphorous rock series is 40-50 meters thick and consists of a set of argillaceous, dolomite-cemented phosphoru...

Claims

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Application Information

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IPC IPC(8): C01B25/027C01F7/02C01F7/04C01B39/00C04B7/14C04B18/14
CPCY02P20/10Y02P40/10Y02P40/18Y02W30/91
Inventor 黄钰雪
Owner 黄钰雪
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