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Slagging fluxing agent for production of electric furnace-process yellow phosphorus

A method of yellow phosphorus and flux technology, applied in the direction of phosphorus compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of reducing reaction temperature and slag discharge temperature, so as to reduce comprehensive energy consumption, reduce production cost, and improve market share. The effect of competitive advantage

Active Publication Date: 2017-03-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In summary, it is feasible to use bauxite instead of traditional silica as a slagging flux for yellow phosphorus production by electric furnace method. There have been reports on the production of phosphoric acid and yellow phosphorus by-product potassium fertilizer by the method and electric furnace method, but the use of albite and nepheline as the slagging flux for yellow phosphorus production to reduce the reaction temperature and slagging temperature has not been reported in the literature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 100g of phosphate rock powder, 20g of coke, and 33g of albite (the content of sodium oxide in albite is 11.5%, and the mass ratio of sodium to potassium oxide is 38), mix them uniformly in a mortar, transfer them to a graphite crucible, and place In the corundum tube, adjust the heating position to a suitable height, plug the plug and connect the protective gas pipeline, feed carbon monoxide at a gas rate of 2L / min, and slowly raise the temperature after 10 minutes, from room temperature to 300°C takes 20 minutes, from 300°C to 800°C ℃ for 20 minutes, 800 ℃ to 1200 for 20 minutes, then rapidly raised to 1250 ℃, maintained at this temperature for 60 minutes, then turned off the heating system, naturally cooled to ambient temperature, took out and weighed, and analyzed the phosphorus content of the residue, the phosphorus decomposition rate was 97.47%, The residue is ground with agate until it passes through a 180-mesh sieve to make an ash cone. The flow temperature ...

Embodiment 2

[0027] Weigh 100g of phosphate rock powder, 20g of coke, and 33g of albite (the content of sodium oxide in albite is 9.5%, and the mass ratio of sodium to potassium oxide is 2.7), mix them evenly in a research bowl, and then transfer them to a high-temperature balance protected by carbon monoxide. in a heavy graphite crucible. Put the graphite crucible filled with the material in the corundum tube, adjust the heating position to a suitable height, plug the plug and connect the protective gas pipeline, pass in carbon monoxide at a gas rate of 2L / min, and slowly heat up after 10min from room temperature to 300 ℃ for 20 minutes, 300 ℃ to 800 ℃ for 20 minutes, 800 ℃ to 1200 for 20 minutes, then rapidly increase the temperature to 1250 ℃, keep the temperature for 60 minutes, then turn off the heating system, naturally cool down to ambient temperature, take out, weigh, and calculate the mass of the residue. The phosphorus content of the residue was analyzed; the results showed that ...

Embodiment 3

[0029] Weigh 100g of phosphate rock powder, 20g of coke, and 33g of nepheline (the content of sodium oxide in albite is 8.7%, and the mass ratio of sodium to potassium oxide is 1.1), mix them evenly in a mortar, and transfer them to a high-temperature balance protected by carbon monoxide. in a graphite crucible. Put the graphite crucible filled with the material in the corundum tube, adjust the heating position to a suitable height, plug the plug and connect the protective gas pipeline, pass in carbon monoxide at a gas rate of 2L / min, and slowly raise the temperature after 10min from room temperature to 300 ℃ for 20 minutes, 300 ℃ to 800 ℃ for 20 minutes, 800 ℃ to 1200 for 20 minutes, then rapidly increase the temperature to 1300 ℃, maintain the temperature for 60 minutes, then turn off the heating system, naturally cool down to ambient temperature, take out and weigh, calculate the mass of the residue, and The residue was analyzed for phosphorus content. The results show tha...

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Abstract

The invention discloses a slagging fluxing agent for production of electric furnace-process yellow phosphorus, and is used for overcoming the fact that a conventional electric furnace-process yellow phosphorus production process takes silica as a fluxing agent, has high reaction and deslagging temperatures, resulting in too high energy consumption proportion in the production cost of yellow phosphorus; albite or nepheline is used for replacing silica as the slagging fluxing agent for production of the electric furnace-process yellow phosphorus, under a condition without changing an original electric furnace-process yellow phosphorus production process and the phosphorus conversion rate, the reaction temperature and the furnace slag melting temperature electric of electric furnace-process yellow phosphorus production are reduced, and thus the energy consumption of the yellow phosphorus production is reduced.

Description

technical field [0001] The invention relates to a slag-forming flux used in the production of yellow phosphorus by an electric furnace method, and belongs to the technical field of comprehensive utilization of mineral resources and energy saving and consumption reduction. Background technique [0002] The yellow phosphorus production process is the electric furnace method. Phosphate rock, silica and coke (white coal) that meet the production process requirements are crushed to meet the material requirements, and released from the storage warehouse in batches according to a certain proportion, and then made into a uniform mixture. Transported to the electric furnace silo. The mixture is continuously sent into the closed micro-positive pressure electric furnace through seven feeding pipes that are evenly distributed and connect the electric furnace body and the silo. The three-phase electrodes (three or six) of the electric furnace work at about its rated power, so that the m...

Claims

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Application Information

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IPC IPC(8): C01B25/027
CPCC01B25/027
Inventor 夏举佩杨劲罗中秋耿锐仙
Owner KUNMING UNIV OF SCI & TECH
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