Rotary furnace cooling agent made of metallurgical waste material product and using method thereof

Abstract

The invention provides a rotary furnace cooling agent made of metallurgical waste material product and a using method thereof. The cooling agent is a carbonic and ferreous conglomeration which mainly takes iron scale, carbonic waste material and ferreous waste material as raw materials, and prepared by additionally adding caking agent into the raw materials. The weight percentage of the main chemical compositions of the cooling agent meets the following condition: the carbon content is 5-25%, the content of TFe is more than or equal to 50%, the content of S is less than or equal to 0.50% and the content of P is less than or equal to 0.50%, 2m drop strength is more than or equal to 5 times, and the compression strength is more than or equal to 1500N. The adding methods of the carbonic and ferreous conglomeration which is taken as the rotary furnace cooling agent comprises: adding before Fe is mixed, adding after Fe is mixed as well as adding respectively before and after Fe is mixed. The recovery rate of iron of the carbonic and ferreous conglomeration is 85-93%. Compared with the prior art, the rotary furnace cooling agent completely uses the waste materials generated in the steel production, so that the process flow is short, the cost is low, the using method is flexible, the adding quantity is large, the recovery rate is high, the field operation is seldom affected, the economic benefit and the environmental protection benefit are remarkable, and the promotion and application values are excellent.

Description

technical field [0001] The invention belongs to the field of metallurgical waste recycling, in particular to a converter coolant using metallurgical waste as a raw material and a method for using the same. Background technique [0002] In the process of converter steelmaking, in order to make good slag, early melt slag and control the appropriate temperature, it is necessary to add cooling and flux. [0003] Traditional cooling and fluxing agents, including lump iron ore, steel scrap, fluorspar, lime, etc. When lumpy iron ore is used as cooling flux, due to the low iron content of lumpy iron ore, the main component is iron oxide which is difficult to reduce, and most of them are acidic ores, not only the metal yield is low, but also the amount of slag will increase , the life of the lining is reduced, and it cannot play a good role as a flux. When scrap steel, lime and fluorite are used as cooling and fluxing agents, on the one hand, the supply of scrap steel in the factor...

AI Technical Summary

Problems solved by technology

At the same time, it solves the problems of large flame, high danger, serious splashing or slag running, and slag overflow when ordinary technology is used to add metallurgical waste coolant, which affects normal smelting operations and unstable metal yields.

This solves the problem that the converter coolant made of other iron-containing wastes has a high content of FeO, which is easy to cause splashing, slag running and overflow during converter smelting, which affects the smelting operation and limits the amount of addition.

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