Fluorine-containing and manganese-containing slag system for blast furnace smelting

A technology of blast furnace smelting and manganese slag, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as gas flow distribution disturbance, economic loss, and furnace condition deterioration, and achieve good fluidity, promote rationalization, and promote rapid recovery.
CN110438274AInactive Publication Date: 2019-11-12PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Publication Date
2019-11-12
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention belongs to the technical field of vanadium titano-magnetite blast furnace ironmaking, and particularly relates to a fluorine-containing and manganese-containing slag system for blast furnace smelting. The fluorine-containing and manganese-containing slag system is composed of the following components including, by weight, 16%-19% of TiO2, 7%-8% of MgO, 12%-14% of Al2O3, 1.0%-1.5% ofMnO, 2.0%-3.0% of CaF2 and the balance CaO and SiO2, wherein the mass ratio of the CaO to the SiO2 is (0.95-1.05):1. The slag system can effectively reduce the melting temperature of slag, so that theslag has better fluidity at the lower temperature, adverse impacts of the position of the high-titanium blast furnace slag on gas permeability and liquid permeability of the parts, where a material column reflow zone and a hearth center position are located, of a material column, rational distribution of blast furnace gas flow is promoted, and rapid recovery of blast furnace conditions is promoted.
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Description

technical field

[0001] The invention belongs to the technical field of vanadium-titanium-magnetite blast furnace ironmaking, and in particular relates to a fluorine-containing manganese-containing slag system for blast furnace smelting. Background technique

[0002] Appropriate slagging system is one of the basic conditions to realize the stable and smooth operation of the blast furnace. For the blast furnace smelting of high-titanium vanadium-titanium magnetite, there are characteristics such as low grade iron into the furnace, high low-temperature pulverization rate of sintered ore, and large amount of iron slag produced per ton. The slag TiO produced in the blast furnace smelting process 2 High content, high melting temperature, TiO in slag 2 It is easy to be over-reduced by coke to form high melting point phases such as Ti(C,N) and deteriorate the fluidity of slag and iron. The above-mentioned reasons easily lead to poor air permeability and liquid permeability of the ...

Claims

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