A method for recycling steel slag heat
A heat recovery and steel slag technology, applied in the field of iron and steel metallurgy, can solve the problems of low processing efficiency, slow heat transfer of steel slag, low heat utilization rate, etc., and achieve the effects of being beneficial to environmental protection, reducing production costs and high practical value
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Embodiment 1
[0027] In a method for recovering heat from steel slag in this embodiment, dolomite with a particle size of less than 200 mm is selected and dried and mixed. Use the LF furnace of a steelmaking plant to refine the slag, and the slag will be discharged at 1650°C (the fluidity of the steel slag is strong at this temperature), and the mixed and dried dolomite and liquid steel slag will be mixed and dried by the hedging method, and the feeding of dolomite and liquid steel slag will be controlled at the same time The rate ratio is equal to the mass ratio of dolomite to liquid steel slag and poured into the slag bag, and the mass percentage of dolomite in the total mixture is controlled to be 40.0%, the dolomite and liquid steel slag mixture is cooled to 500°C, and finally the mixture Carry out crushing, gravity sieving, wherein the oxide that dolomite decomposition produces is used as metallurgical auxiliary material (compared with purchasing these auxiliary materials on the market,...
Embodiment 2
[0037] A method for recovering heat from steel slag in this embodiment is basically the same as in Embodiment 1, the difference is that in this embodiment, limestone with a particle size of less than 200 mm is selected and dried and mixed. Using converter slag from a steelmaking plant, the slag is discharged at 1400°C, and the mixed and dried limestone and liquid steel slag are hedging, and the ratio of the feeding rate of limestone to liquid steel slag is controlled to be equal to the ratio of the mass of limestone to liquid steel slag. Put it into the slag bag, and control the mass percentage of limestone in the total mixture to 20.0%, cool the mixture of limestone and liquid steel slag to 500°C, and finally crush the mixture and sieve it by gravity, and the oxides produced by the decomposition of limestone are used as Metallurgical auxiliary materials; the separated steel slag is further processed by hot stuffing, magnetic separation, screening and so on.
[0038] In this e...
Embodiment 3
[0045] A method for recovering heat from steel slag in this embodiment is basically the same as in Embodiment 1, except that in this embodiment, siderite with a particle size of less than 200 mm is selected and dried and mixed. Using the electric furnace slag of a steelmaking plant, the slag is discharged at 1350°C, and the mixed and dried siderite and liquid steel slag are poured into the slag bag by the hedging method, and the mass percentage of the siderite in the total mixture is controlled to be 25.0 %, cool the mixture of siderite and liquid steel slag to 400°C, and finally crush the mixture and sieve it by gravity, in which the oxides produced by the decomposition of siderite are used as metallurgical auxiliary materials; the separated steel slag is heated and magnetically Selection, screening and other deep processing.
[0046] In this embodiment, the theoretical analysis of siderite absorbing liquid steel slag waste heat is as follows: the main component of siderite i...
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Abstract
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