Device for directly adding sintering returned dust into ladle

Abstract

The invention discloses a device for directly adding sintering returned dust into a ladle. The device comprises a ladle and an aggregation bucket. A pneumatic quadrant valve is arranged at the blanking opening of the aggregation bucket; a bucket belt is arranged below the aggregation bucket; a material inlet of the bucket belt corresponds to the blanking opening of the aggregation bucket; a blanking collecting bucket is arranged at a material outlet at an uptrend end of the bucket belt; the bottom end of a blanking pipe of the blanking collecting bucket is fixedly connected with a guide pipeline; an outlet of the guide pipeline is positioned above the ladle and corresponds to a melted iron outlet of a blast furnace; a rotating device is arranged at the upper part of the blanking pipe of the blanking collecting bucket; three or more weighing sensors are uniformly distributed at the lower edge the aggregation opening of the aggregation bucket; signal terminals of the weighing sensors are connected with control devices; and output terminals of the control devices are respectively connected with a pneumatic device, the rotating device and a control terminal for driving the bucket belt. The device directly adds granule dust into the ladle, saves the process of resintering of sintering returned dust, reduces the consumption of steel and iron material, and reduces the production cost.

Description

technical field [0001] The invention relates to an auxiliary device in the field of iron and steel production, in particular to a feeding device. Background technique [0002] At present, the situation of the steel market is becoming more and more serious, how to reduce the production cost of steel has become the goal pursued by various steel factories. Steel is generally extracted from iron ore, and fundamentally speaking, the raw material of steel is iron ore. From iron ore to steel, there are several different crafting paths. The most important is the "blast furnace approach". Iron ore is first smelted into pig iron in a blast furnace, and then pig iron is used as raw material to be smelted into steel by different methods. Blast furnace ironmaking is the main method of modern ironmaking and an important link in steel production. However, the ore powder from the mine is too small in size and has poor air permeability, which may easily lead to material collapse in the bla...

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Problems solved by technology

[0004] However, the sintered ore produced by the sintering plant as the raw material of the blast furnace always has a part of the sieved powder whose particle size is too small, and its particle diameter is only 4-5mm or smaller. If this part of the sintered powder is directly added to the blast furnace for use, the lower part of the blast furnace The hot air of 1000-1300 degrees Celsius blown into the tuyere is enough to suspend it on the top of the blast furnace, which cannot ensure that the charge is evenly lowered, which in turn affects the smooth progress of the reduction reaction in the blast furnace. Therefore, the sintered powder of such small particles cannot be directly used as raw materials in the blast furnace. , only to re-sinter it, which undoubtedly increases the production cost

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