Process applicable to transfer of molten steel slag of converter and optimization of treatment of hot smouldering slag

Abstract

The invention provides a process applicable to transfer of molten steel slag of a converter and optimization of treatment of hot smouldering slag. According to the process, a slag film of 20 to 80mm, which is formed by bringing the high-temperature molten slag tank of the converter into contact with the inner wall of the slag tank of a steel casting and then rapidly cooling, is adopted as the refractory material of a lining; the slag surface of the slag tank containing the motel steel slag of the converter is processed for 0.5 to 2 hours by spraying atomized water, so as to form a slag housing of 100 to 150mm on the slag surface, thus the loss of thermal radiation can be reduced once the steel slag is contained again, the molten slag can be prevented from being splashed during transportation, and a condition for treating the hot smouldering slag at a temperature over 800 DEG C is provided; an infrared temperature measuring gun is adopted and used for measuring the temperature of the slag tank, and the tank can be drawn when a housing of the slag tank is at a temperature below 425 DEG C and the slag housing of the upper part is at temperature below 625 DEG C, and as a result, the safety in production can be ensured.

Description

technical field [0001] The invention relates to the transfer protection of converter liquid steel slag, especially capable of meeting the temperature range required by the hot stuffy slag treatment process, and at the same time combining data detection to ensure the safety of slag pot transfer. The detection method is simple and practical. Background technique [0002] At present, the hot stuffy slag process has become one of the preferred processes in many steel mills. The optimum temperature of the hot stuffy slag required is 300-800°C. Because it is a new process, the hot stuffy slag treatment area of ​​many steel plants has only been developed in recent years. Those constructed are far away from the converter steelmaking plant; usually the converter steel slag needs to be put into a slag tank made of cast steel, and then transported to the hot stuffy slag yard by train or car for a long distance, and the danger of transporting solid steel slag is relatively high. Small, ...

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Problems solved by technology

[0002]At present, the hot stuffy slag process has become one of the preferred processes in many steel mills. The optimum temperature of hot stuffy steel slag required is 300-800°C. Since it is a new process, The hot stuffy slag treatment area of ​​many steel plants was built in recent years, and they are far away from the converter steelmaking plant; usually, the converter steel slag needs to be loaded into a slag tank made of cast steel, and then transported to Hot and stuffy slag yard treatment, in which the risk of transferring solid steel slag is relatively small, and the risk of transferring liquid steel slag is relatively high, which comes from several aspects: 1) the hauling of canned liquid steel slag, the splash of steel slag will cause fire; 2) part of the slag If the temperature is higher than 1600°C, the slag tank will melt and produce voids, that is, the tank will cause a vehicle fire; 3) The molten steel in the slag tank is heavier than the steel slag, and it will deposit at the bottom, causing slag and steel leakage accidents; 4) Hot stuffy slag technology is adopted The cooling methods of the steel mills all adopt natural cooling for 6-8 hours, which takes up a lot of space, the number of transfer slag tanks is large, and the cost investment is relatively large

[0003]According to the literature search, it is disclosed: (1) Yin Weiping published the paper "Development and application of converter steel slag thermal braising technology" in "Steel Research" 2010 (2): 24; (2) Shuai Changlin published the paper "Safety Protection Design and Mining Technology of Slag Tank Transporter" in "Steel Research" 2003 (3): 68; (3) Yan Bingfu, Zhuang Guanhua, Yan Li published in "Steel Research" 2002 (2 ): 48 papers on "Manufacturing China's Foundry Equipment and Technology for Large Steel Casting Slag Pots"; none of the above information can effectively solve the safety precautions and efficient transportation problems in the process of pulling cans