Electric furnace charging process for high-titanium blast furnace slag carbonization

Abstract

The invention relates to the field of comprehensive utilization of high-titanium blast furnace slag, and provides an electric furnace charging process for high-titanium blast furnace slag carbonization. The process comprises the following steps of: 1) controlling the blast furnace tapping temperature at over 1,450 DEG C; 2) introducing liquid blast furnace slag into a slag pot car through a slag runner; 3) solidifying the blast furnace slag to form slag crust, and performing sealed heat insulation on the liquid blast furnace slag in the slag pot car; 4) conveying the slag to an electric furnace through the slag pot car for less than or equal to 2 hours; and 5) breaking the slag crust, and guiding the liquid blast furnace slag into the electric furnace through a guide plate and a guide trough. By charging the liquid slag into the furnace, the heat in the blast furnace slag is furthest kept so as to reduce the energy consumption of a blast furnace slag high-temperature carbonization process, reduce the time required for blast furnace slag high-temperature carbonization and smelting and avoid the water resource waste of the conventional water quenching slag; and meanwhile, the process has little modification on the conventional equipment, is easy to implement, and has low implementation cost. The process is suitable for charging of the high-titanium blast furnace slag carbonization.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of high-titanium blast furnace slag, in particular to an electric furnace charging process for carbonizing high-titanium blast furnace slag. Background technique [0002] During the blast furnace smelting process of vanadium-titanium magnetite, about 80-90% of Ti will enter the blast furnace slag, which is usually called high-titanium blast furnace slag. According to the different ratio of vanadium-titanium-magnetite during blast furnace smelting, TiO in high-titanium blast furnace slag 2 The content varies, but usually between 20 and 29%. Unlike ordinary blast furnace slag, which is basically an acidic glass phase, high-titanium type blast furnace slag is a very complex and special system, the main components are Ti, Ca, Si, Al, Mg, followed by Fe, V, Mn, P It is a kind of alkaline slag, which is affected by a large number of minerals with high melting point and strong crystallization i...

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Problems solved by technology

[0006] Liquid hot charging furnace, in order to ensure that the blast furnace slag is still in a molten state when it is transported to the carbonization workshop, and can be smoothly loaded into the electric furnace for smelting, the blast furnace slag must have good fluidity, but in fact, the high-titanium type blast furnace slag is a typical Short slag has a high melting temperature and is easy to solidify and agglomerate. Therefore, the electric furnace must be built very close to the blast furnace to realize the thermal charging of liquid blast furnace slag into the furnace. Due to the limitation of objective conditions, it is difficult to realize

Or the existing slag pot can be changed into a mobile electric furnace, but the cost of related facilities and implementation is difficult to estimate, and the implementation is very difficult. It is likely that the increased cost will be much higher than the reduced cost by using its sensible heat of fusion, and The difficulties associated with maintaining its complex ancillary facilities cannot be underestimated

Therefore, at present, the implementation of liquid slag thermal charging furnace is very difficult

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