Method for preparing premelted refining slag by using converter slag and aluminum slag

A technology of converter slag and refining slag, which is applied in the field of preparing premelted refining slag, can solve the problems of unfavorable natural resource protection and high energy consumption, achieve good desulfurization thermodynamic conditions, simple preparation process, and reduce oxidation
CN101984088AInactive Publication Date: 2011-03-09NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NORTHEASTERN UNIV
Publication Date
2011-03-09
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method for preparing premelted refining slag by using converter slag and aluminum slag, which comprises the following steps: selecting raw materials according to the requirement that the content of metallic aluminum in the aluminum slag is greater than or equal to 20% in mass percent; proportioning the raw materials under the condition that the mass ratio of the converter slag to the aluminum slag is (2.0-2.5):1; controlling the smelting temperature of the premelted refining slag at 1500-1600 DEG C, adding the aluminum slag in three batches after the converter slag is completely molten down, and standing for 20-30min after the last batch of aluminum slag is added and stirred uniformly, thereby realizing the purpose of separating slag from iron in a molten pool; and cooling the prepared premelted refining slag to the normal temperature, crushing the prepared premelted refining slag to the particles of which the particle size range is within 5-30mm, and then, packaging the particles. On the basis of ensuring the refining effect, the method of the invention completely uses industrial slag materials as raw materials, thereby protecting the natural mineral resources, widening the utilization ways of the converter slag and the aluminum slag as resources, and partially realizing the cyclic utilization of the converter slag in iron and steel production processes.
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Description

technical field

[0001] The invention relates to the technical field of metallurgy and environmental protection, and relates to a resource utilization technology of solid waste in the metallurgical industry, in particular to a method for preparing premelting and refining slag by utilizing converter slag and aluminum slag. Background technique

[0002] Converter slag mainly contains CaO, SiO 2 , FeO, Fe 2 o 3 , MnO, Al 2 o 3 , MgO, P 2 o 5 The components such as S and S are mainly derived from the addition of slagging agents such as lime, dolomite, iron ore and iron oxide scale during the converter smelting process, the oxidation of aluminum, silicon, manganese and other elements in molten iron and scrap steel, and the erosion of lining refractory materials. Calculated on the basis that the converter slag emission per ton of steel is 10~15kg, the world output of converter steel was 853 million tons in 2009, and about 100 million tons of converter slag were produced, amon...

Claims

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