Composite fluxing medium for revolving furnace

Abstract

The invention relates to metallurgy, in particular to a composite fluxing medium for a revolving furnace. The composite fluxing medium can be used for slagging when in steel-making of the revolving furnace so as to improve the smelting efficiency of the revolving furnace, and comprises the raw materials including ferric oxide and manganese oxide, wherein the ferric oxide accounts for the weight percent of 40-60%, the manganese oxide accounts for the weight percent of not more than 20%, and the rest component is additive. The composite fluxing medium has the advantages that the content of the FeO is high and the content of the MnO is low, so that initial period slagging of the revolving furnace can be more easily carried out; the loss of molten iron can reduced; and the composite fluxing medium adopts the industrial wastes such as OG mud, dedusting powder, iron scale and the like which are low in price and hard to recover as raw materials, so that the product has the advantages of low cost and being environment-friendly and economical.

Description

technical field [0001] The invention relates to metallurgy, in particular to a composite slagging agent for converters used for slagging during converter steelmaking to improve converter smelting efficiency. Background technique [0002] At present, there are the following problems in converter slagging: the amount of lime and light-burned dolomite is too large, and there are no strengthening measures for slag in the early stage, the melting point of slag is high, and the reactivity is poor, resulting in weak dephosphorization ability of slag, high free CaO and excessive MgO in the final slag. saturation. [0003] In the prior art, for example, invention patent ZL200510037631.1 converter high-efficiency metallurgical composite agent and its preparation method and application. The disadvantage is that the content of MnO is too high, and the content of FeO most needed for CaO and MgO melting is too low, resulting in slow slagging speed and high cost, which does not meet the c...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of composite slagging agent for converter according to above-mentioned weak point of prior art, this composite slagging agent also contains a certain amount of MnO except containing higher FeO, wherein the content of FeO is greater than The content of MnO can completely solve the problem of weak slag removal ability in the initial stage of converter smelting