Production and recovery technology for silica powder

A silicon micropowder and process technology, which is applied in the field of silicon micropowder production and recycling process, can solve the problems of difficulty in meeting production requirements, low purity of silicon micropowder, and high energy consumption in the recycling process, and achieves reducing power consumption, improving purity, and sharpening pulses. cutting edge effect

Inactive Publication Date: 2018-08-14
吕军超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A large amount of dust produced during the smelting of metal silicon and ferrosilicon is silicon micropowder, which is a large amount of highly volatile silicon monoxide and silicon gas produced by the reduction of high-purity quartz, coke and wood chips in the submerged arc furnace. The gas is discharged quickly Contact with cold air and oxidize it to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A process for the production and recovery of microsilica powder, comprising the steps of:

[0026] S1: One-time dust removal, the flue gas in the submerged arc furnace is introduced by the fan, and enters the dust collector through the pipe to filter and remove dust, and remove coke and sawdust waste;

[0027] S2: Flue gas cooling, the flue gas after dust removal enters the air cooler through the pipe for cooling treatment;

[0028] S3: pulse bag dust removal, the cooled flue gas enters the pulse bag dust collector, the smoke dust is pressed into the filter bag by the induced draft fan, and then compressed air is sprayed to the filter bag, the filter bag expands rapidly, and the reaction generated by the reverse suction fan Under the action of the air flow, the dust is cleared due to the vibration of the filter bag;

[0029] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust removal treatment, and the product ...

Embodiment 2

[0038] A process for the production and recovery of microsilica powder, comprising the steps of:

[0039] S1: One-time dust removal, the flue gas in the submerged arc furnace is introduced by the fan, and enters the dust collector through the pipe to filter and remove dust, and remove coke and sawdust waste;

[0040] S2: Flue gas cooling, the flue gas after dust removal enters the air cooler through the pipe for cooling treatment;

[0041] S3: pulse bag dust removal, the cooled flue gas enters the pulse bag dust collector, the smoke dust is pressed into the filter bag by the induced draft fan, and then compressed air is sprayed to the filter bag, the filter bag expands rapidly, and the reaction generated by the reverse suction fan Under the action of the air flow, the dust is cleared due to the vibration of the filter bag;

[0042] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust removal treatment, and the product ...

Embodiment 3

[0051] A process for the production and recovery of microsilica powder, comprising the steps of:

[0052] S1: One-time dust removal, the flue gas in the submerged arc furnace is introduced by the fan, and enters the dust collector through the pipe to filter and remove dust, and remove coke and sawdust waste;

[0053] S2: Flue gas cooling, the flue gas after dust removal enters the air cooler through the pipe for cooling treatment;

[0054]S3: pulse bag dust removal, the cooled flue gas enters the pulse bag dust collector, the smoke dust is pressed into the filter bag by the induced draft fan, and then compressed air is sprayed to the filter bag, the filter bag expands rapidly, and the reaction generated by the reverse suction fan Under the action of the air flow, the dust is cleared due to the vibration of the filter bag;

[0055] S4: Secondary dust removal, the uncollected product enters the dust collector again with the flue gas for dust removal treatment, and the product i...

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PUM

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Abstract

The invention discloses a production and recovery technology for silica powder. The production and recovery technology comprises the following steps: S1: carrying out primary dust removal; S2: carrying out smoke cooling; S3: carrying out pulse cloth bag dust removal; S4: carrying out secondary dust removal; S5: preparing water slurry; S6: regulating a pH (Potential of Hydrogen) value; S7: carryingout sedimentation; S8: filtering; S9: carrying out flocculating settling; S10: packaging. By strictly controlling the production and recovery technology for silica powder, a nanosecond plasma is adopted to generate a pulsed power supply, the circuit of the pulsed power supply adopts a high-power pulse and magnetic compression technology, a microsecond low-voltage pulse is generated through a pulse generation device, is raised to a microsecond high-voltage pulse through a pulse booster and is compressed into a nanosecond high-voltage pulse through a pulse compression device so as to realize the purposes of sharpening pulse front edges, narrowing pulse width and improving repeated frequency, power energy consumption is lowered, energy is saved, and environment is protected. The obtained silica powder is respectively processed by two ways of wet method purification and flocculation method purification, the purity of the silica powder can be improved to be 90% or more, and the productionand recovery technology is suitable to be widely popularized.

Description

technical field [0001] The invention relates to the technical field of silicon micropowder treatment, in particular to a production and recovery process of silicon micropowder. Background technique [0002] Silica powder is a non-toxic, odorless, non-polluting inorganic non-metallic material. It is widely used in chemical industry, electronics, integrated circuit (IC), electrical appliances, Plastics, coatings, advanced paints, rubber, national defense and other fields. With the rapid development of high-tech fields, silicon micropowder will also enter a new historical development period. [0003] A large amount of dust produced during the smelting of metal silicon and ferrosilicon is silicon micropowder, which is a large amount of highly volatile silicon monoxide and silicon gas produced by the reduction of high-purity quartz, coke and wood chips in the submerged arc furnace. The gas is discharged quickly Contact with cold air and oxidize it to condensate and precipitate...

Claims

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Application Information

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IPC IPC(8): C01B33/12
CPCC01B33/12Y02P20/10
Inventor 吕军超
Owner 吕军超
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