Carbon decreasing synergistic agent for iron ore powder sintering

Abstract

The invention belongs to the iron ore sintering field and relates to an iron ore powder sintering carbon dropping synergist which is applied to the iron ore powder sintering production. The iron ore powder sintering carbon dropping synergist is characterized in that the synergist comprises the components by weight percent of 10-50% of sodium nitrate, 10-50% of boric acid, 5-25% of bentonite, 5-10% of sodium carbonate and 5-10% of fluorite. In the using method, the dried ingredients are finely ground to be 0.052mm, mixed uniformly and sealed into a bag. When in use, the bag is opened and the components are poured into a hopper of the carbon dropping synergist. The adding amount of the synergist is 0.01-0.04% of the dry weight of the mixture. Double-controle of a screw feeder and an electric vibrating feeder is adopted to accurately distribute the mixture on a main belt of the sintering mixture pro rata. The feeders are required to be arranged behind a carbon feeder to ensure that the carbon dropping synergist is uniformly bestrewed on coke powder, coal dust or coke and coal mixed powder. The synergist has the advantages of good environment protection effect, low using amount, less added cost and obvious using effect and can be applied to sintered ores of different types with different alkalinity.

Description

A carbon reduction synergist for iron ore powder sintering technical field The invention belongs to the field of iron ore sintering, and relates to a carbon-reducing synergist for iron ore powder sintering, which is suitable for reducing fuel consumption, improving environmental protection, and increasing output and strength in iron ore powder sintering production. Background technique There are many synergist technologies and methods to reduce solid fuel consumption and improve sinter quality, such as the sintering synergist of Langfang Tengda Metallurgical Auxiliary Company, Sihe Chemical Co., Ltd., Henan Tongyu Group Metallurgical Materials Co., Ltd. The common point of this kind of metallurgical additive method is that they all adopt the principle of catalytic combustion, without considering the environmental protection of the materials used, and often use materials with "Cl" sources, such as magnesium chloride (MgCl2), Sodium chloride (NaCl), sodium chlorate (NaClO3),...

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Problems solved by technology

There are many synergist technologies and methods to reduce solid fuel consumption and improve sinter quality, such as the sintering synergist of Langfang Tengda Metallurgical Auxiliary Company, Sihe Chemical Co., Ltd., Henan Tongyu Group Metallurgical Materials Co., Ltd. The common point of this kind of metallurgical additive method is that they all adopt the principle of catalytic combustion, without considering the environmental protection of the materials used, and often use materials with "Cl" sources, such as magnesium chloride (MgCl2), Sodium chloride (NaCl), sodium chlorate (NaClO3), these inorganic substances generate the most harmful gas in the world today - dioxin during the sintering process at a temperature of 300 ° C to 400 ° C. Since 2006, Western industrialized countries have banned the input of "Cl" sources in the production process of sintering and electric furnace steelmaking

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