Silicon discharging method for initial blowing-in of metal silicon smelting

Abstract

The invention relates to a silicon discharging method for initial blowing-in of metal silicon smelting. The method comprises the following steps of: drilling a hole at a silicon outlet by using an air drill, filling charcoal powder into a drill hole, and plugging up the drill hole with a mud ball; and during silicon discharging, clearing the mud ball with a gablock, and performing electric arcingat the silicon outlet by using a graphite carbon rod arc burner to drain silicon melt. The silicon outlet is drilled by using the air drill, so that a formed silicon outlet shape is regular, unplugging of the silicon outlet is easy and reliable during subsequent production, the damage rate of the silicon outlet is lowered greatly, and the service life can be prolonged to 100-130 furnace times; and the use of an oxygen lance is avoided, so that spattering of metal melt and flue gas are reduced.

Description

1. Technical field [0001] The invention relates to a silicon-extraction method for the initial furnace smelting of metal silicon, which belongs to the technical field of metal silicon pyrometallurgy. 2. Background technology [0002] In the metal silicon smelting process, the silicon extraction operation is a key process; especially the silicon extraction method for the first furnace is of vital importance. [0003] The smooth unblocking of the silicon outlet can greatly save the labor intensity of the workers; more importantly, the smooth unblocking of the silicon outlet on time is conducive to the stable control of the production load of the submerged arc furnace for metal silicon smelting. Failure to open the silicon outlet in time when the silicon needs to be produced will lead to an increase in the current of the submerged arc furnace for metal silicon smelting, and the electrode will be lifted up, resulting in a decrease in production and deterioration of the furnace c...

AI Technical Summary

Problems solved by technology

[0008] 1. It is very dangerous and difficult to guarantee safety: when the silicon port is burned out with an oxygen blowing tube, a large amount of molten metal will splash;

[0009] 2. The operating environment is harsh: when the silicon port is burned out with an oxygen blowing tube, a large amount of smoke is generated;

[0011] 4. Affect product quality: A large amount of iron melts into the silicon water bag to pollute the product, which affects product quality. It is easy to produce out-of-grade products when the furnace is opened for the first time.