Closed device for producing macrocrystalline fused magnesite

Abstract

The invention provides a closed device for producing macrocrystalline fused magnesite, which comprises a light calcined magnesia kiln and submerged arc furnaces, the light calcined magnesia kiln is connected with the submerged arc furnaces through a middle bin and a chain grate type feeder, the light calcined magnesia kiln is matched and butted with a plurality of sets of submerged arc furnaces, and the chain grate type feeder feeds materials to the submerged arc furnaces through magnesite powder articulated chutes. A heat preservation cover is arranged outside the chain grate type feeder, and the inner wall of the middle bin and the inner walls of the magnesite powder articulated chutes are each provided with a heat insulation abrasion-resistant refractory material. Light calcined magnesia powder is thermally conveyed in a closed channel, so that the heat loss is reduced, and the energy is saved; the smoke waste heat can be utilized to preheat raw materials through smoke recovery of the macrocrystalline fused magnesite submerged arc furnaces; and automatic feeding of the submerged arc furnaces is achieved through smoke temperature monitoring, heat preservation is conducted on furnace barrels of the submerged arc furnaces after smelting is completed, and the furnace barrels can be independently covered with covers or placed in a heat preservation chamber in a centralized mode.

Description

technical field [0001] The invention relates to a production and processing device for large-crystal fused magnesia, in particular to a closed-type device for producing large-crystal fused magnesia. Background technique [0002] At present, most large crystalline fused magnesia are produced by "two-step method". The so-called "two-step method" means that the first step is to lightly burn the magnesite ore at a lower temperature to obtain lightly burned magnesia powder with an MgO content of more than 90%. Then lightly burned magnesia powder is used as raw material and put into submerged arc furnace for large crystal fused magnesium smelting. Submerged arc furnaces are mostly open structures. The smelted furnace cylinder is generally placed in the workshop for natural cooling. [0003] At present, the production process of light-burned magnesia powder and the production process of large-crystal fused magnesia are two independent links. The hot light-burned magnesia powder ...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a closed-type device for producing large-crystal fused magnesia, which solves the connection problem between the production process of light-burned magnesia powder and the production process of large-crystal fused magnesia, and its technical scheme is as follows:

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