Method for producing yellow phosphorus from phosphate rock powder and carbon powder

A technology of phosphate rock powder and carbon powder, which is applied in the field of yellow phosphorus production, can solve the problems of high processing cost, high cost, and difficulty in briquetting, and achieve low cost, reduce production cost, and solve the effects of arching

Inactive Publication Date: 2015-09-09
CHENGDU LESHI CHEM ENG
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Problems solved by technology

[0004] Carbon, another main raw material for yellow phosphorus production, is generally dominated by lump coke, semi-coke, and white coal, and the cost is relatively high
However, a large amount of coke powder, semi-coke powder and white coal powder in coke, semi-coke and white coal processing enterprises are difficult to briquette (or form into balls), and the processing cost is high, especially when sodium humate, sodium silicate and other sodium salts are added. after leading to Na 2 The excessive introduction of O seriously affects the stability of yellow phosphorus production and the quality of yellow phosphorus
A large amount of cheap coke powder, semi-coke powder and white coal powder cannot be used in the production of yellow phosphorus

Method used

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  • Method for producing yellow phosphorus from phosphate rock powder and carbon powder

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Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 utilizes phosphate rock powder and coke powder to produce the method for yellow phosphorus

[0023] with P 2 o 5 8.48 tons of phosphate rock powder with a content of 28.5%, and 1.84 tons of coke powder with a fixed carbon content of 80%. Use a briquette machine with a pressure of 19MPa to press into pellets, sieve to obtain phosphorus coal pellets with a diameter of 5mm-30mm, dry the phosphorus coal pellets through a dryer at 350°C, and consolidate them with a consolidation machine at 650°C, and then mix them into 2.16 tons of silica, and finally sent to the yellow phosphorus electric furnace to react to produce yellow phosphorus.

[0024] Phosphate rock powder P 2 o 5 The content of coke powder is 28.5%, the moisture content is 6%, and the particle size is ≤3mm; the fixed carbon content of coke powder is 80%, the ash content is 15.5%, the volatile matter is 2%, and the moisture content is 11%.

[0025] The compressive strength of finished phosphorus c...

Embodiment 2

[0026] Embodiment 2 utilizes phosphate rock powder and blue charcoal powder to produce the method for yellow phosphorus

[0027] with P 2 o 5 Content is 8.77 tons of phosphate rock powder of 28.5%, 1.96 tons of semi-coke powder with fixed carbon content of 80%, add phosphate rock powder and semi-coke powder gross weight 4% modified crude phosphoric acid and 3% bentonite powder, mix the The material is pressed into balls by a briquetting machine with a pressure of 4MPa, and sieved to obtain phosphorus coal pellets with a diameter of 5mm-30mm. The phosphorus coal pellets are dried by a dryer at 180°C and consolidated by a consolidation machine at 640°C. Put in 2.46 tons of silica, and finally send it into the yellow phosphorus electric furnace to react to make yellow phosphorus.

[0028] Phosphate rock powder P 2 o 5 The content of carbon dioxide is 28.5%, the moisture content is 6%, and the particle size is ≤3mm; the fixed carbon content of blue charcoal powder is 80%, the ...

Embodiment 3

[0030] Embodiment 3 utilizes phosphate rock powder and white coal powder to produce the method for yellow phosphorus

[0031] with P 2 o 5 8.77 tons of phosphate rock powder with a content of 28.5%, and 2.00 tons of white coal powder with a fixed carbon content of 80%. Use a briquetting machine with a pressure of 10MPa to press into pellets, sieve to obtain phosphorus coal pellets with a diameter of 5mm-30mm, dry the phosphorus coal pellets through a dryer at 400°C, and consolidate them with a consolidation machine at 620°C, and then mix them into 2.54 tons of silica, and finally sent to the yellow phosphorus electric furnace to react to produce yellow phosphorus.

[0032] Phosphate rock powder P 2 o 5 The content of coke powder is 28.5%, the moisture content is 6%, and the particle size is ≤3mm; the fixed carbon content of coke powder is 80%, the ash content is 15.5%, the volatile matter is 2%, and the moisture content is 11%.

[0033] The compressive strength of finishe...

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Abstract

The invention provides a method for producing yellow phosphorus from phosphate rock powder and carbon powder. The method comprises steps as follows: the phosphate rock powder and the carbon powder are mixed in a production ratio and are pressed to form pellets after a binding agent is added, the pellets are dried and solidified, silica is added, and the mixture is sent into a yellow phosphorus electric furnace to prepare the yellow phosphorus. With the adoption of the method, the production cost of the yellow phosphorus can be averagely reduced by more than 800 yuan/ton; the problem about comprehensive utilization of the phosphate rock powder and the carbon powder is solved, and the problems of arching, material collapse and electrode breakage of the yellow phosphorus electric furnace are completely solved; the method has remarkable effects in the aspects of improvement of the yellow phosphorus production environment and realization of cleaner production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for producing yellow phosphorus by using phosphate rock powder and carbon powder. Background technique [0002] In order to save energy consumption and reduce production costs, yellow phosphorus production enterprises in my country have used rich ore lumps as the main raw materials for phosphorous ore (P 2 o 5 Mass fraction ≥ 28%). After years of over-exploitation, there are not many rich ore lumps left, and it is difficult to guarantee the production needs of yellow phosphorus. However, a large amount of high-grade fine ore cannot be utilized in the production of yellow phosphorus. At present, most yellow phosphorus production enterprises have high energy consumption and high material consumption due to the low grade of raw materials. Based on the calculation of 10,000 tons / year yellow phosphorus production equipment, the annual direct loss amount is more than 10 mil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/027
Inventor 罗宗恬
Owner CHENGDU LESHI CHEM ENG
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