Direct use of submerged arc furnace powder and different-particle-size and different-ratio feeding

Abstract

The invention provides a method for direct use of submerged arc furnace powder and different-particle-size and different-ratio feeding. Two or more independent feeding systems are used in a submerged arc furnace for feeding, powder and raw materials different in ratio, particle size or grade are put into a hearth material surface through the two or more independent feeding systems by means of feeding pipes which are independent at intervals, and feeding and stopping of the feeding pipes are controlled through feeding pipe valves, so that the direct use of the submerged arc furnace powder is achieved, or automatic smelting control over linkage of feeding and a submerged arc furnace smelting monitoring system is achieved.

Description

[0001] Technical field: [0002] The invention is used for the feeding and feeding method of the submerged arc furnace, so as to realize the direct use of the powder, the feeding of different particle sizes and different proportions and the optimization of the furnace condition of the submerged arc furnace. [0003] technical background: [0004] With the promotion of large submerged arc furnaces and the increase in labor costs and the increase in the diameter of submerged arc furnaces, manual feeding is gradually eliminated, and a single feeding system is not conducive to the stable operation of submerged arc furnaces and the realization of unmanned automatic control of submerged arc furnaces; first, In the smelting of hard materials such as ferrosilicon and industrial silicon, the particle size of the ore and the reducing agent is very different. The traditional full-mixing single-system mechanical feeding produces a material segregation effect, which separates the large ore f...

AI Technical Summary

Problems solved by technology

[0004] With the promotion of large submerged arc furnaces and the increase in labor costs and the increase in the diameter of submerged arc furnaces, manual feeding is gradually eliminated, and a single feeding system is not conducive to the stable operation of submerged arc furnaces and the realization of unmanned automatic control of submerged arc furnaces; first, In the smelting of hard materials such as ferrosilicon and industrial silicon, the particle size of the ore and the reducing agent is very different. The traditional full-mixing single-system mechanical feeding produces a material segregation effect, which separates the large ore from the small reducing agent carbon particles. , affect the smelting effect and the depth of the electrode into the furnace; secondly, in the smelting of large powder materials such as manganese series, chromium series, and calcium carbide, the raw materials fed by a single system are completely mixed, so that the air permeability of the bulk materials in the raw materials is controlled by the powder materials. Due to the loss of burial, the air permeability of the submerged arc furnace is worse after the powder is mixed, which not only affects the insertion depth of the smelting electrode, but also is prone to safety accidents such as furnace spraying, furnace liquid surge, and furnace spraying; the trend of large submerged arc furnaces is unstoppable, and the use of Powder can reduce the cost, coupled with the need for digital smelting and smelting automatic control of submerged arc furnaces, so new feeding design methods are needed to meet the feeding needs of submerged arc furnaces for actual smelting

Images