Method for preventing crush of slag ladle when positioning furnace washing slag

Abstract

The invention provides a method for preventing crush of a slag ladle when positioning furnace washing slag, which comprises the steps of: paving paint wasted by a tundish used by continuous casting steel at the bottom of the slag ladle, wherein the paved paint is 200-220 mm thick; then paving 800-820 kg of wasted oxidized steel slag of a rotary furnace, wherein the grain size of the steel slag is smaller than 100 mm; and carrying out slag positioning operation by using the slag ladle to effectively prevent damage caused by crush of the ladle when positioning furnace washing slag. The wasted paint used consists of 80% of powder and 20% of mixture of which the grain size is 30-50 mm.

Description

[0001] technical field [0002] The invention relates to the safe production of steelmaking, and is mainly aimed at the protection of the slag tank easy-to-wear tank containing converter slag washing, and at the same time solves the problem of recycling waste paint in the tundish during the production process of the continuous casting production line. Background technique [0003] Before the converter is dismantled, it is necessary to carry out the furnace washing operation, that is, to dissolve the slag splash layer and the adhered slag on the converter lining through the high-temperature slag, and repair the furnace material, so as to facilitate the subsequent dismantling operation. Furnace washing operation has the following two processes: (a) The tapping temperature of the last furnace of steel is kept above 1680°C, and the fluidity of the slag is deliberately required to be better, so the slag temperature is higher, the iron oxide content in the slag is higher, and the s...

AI Technical Summary

Problems solved by technology

The traditional treatment method of the slag tank is to spray anti-sticking slag agent into the slag tank first, and then lay a layer of about 3 tons of hot dry steel slag on the bottom of the slag tank to prevent molten steel from entering the slag tank during the slag discharge process. bottom of the bottom, resulting in the accident of the tank, but this method cannot effectively solve the problem of the slag tank piercing caused by the slag tank containing the converter washing slag

[0004] Literature search disclosure: (1) "Application of SGLZ-Ⅲ slag tank spraying technology in Shougang" published by Wang Cunzheng, Environmental Engineering [J], April 2005, Vol. 23, No. 2: 81; (2) published by Li Anning Paper "Development of Spray Coating for 90-ton Converter Slag Pot" Hunan Metallurgy [J] 2001 (5); (3) Yan Bingfu's paper "Manufacture of Large Steel Casting Slag Pot Chinese Foundry Equipment and Technology" [J] 2002 ( 2); None of them involve the method of preventing the tank from being pierced during the transfer of the slag tank for converter washing and slag transfer