Blast furnace high-carbon ferromanganese smelting raw materials, fuels and flux loading method directly affects the distribution of the blast furnace broken material layer distribution and the distribution of the rising gas flow, the blast furnace charging system including material line, material batch, charging sequence and the working system of the fabricator.
Material line, i.e. the distance from the lower edge to the material surface after the big bell descends, according to the characteristics of manganese ore with small particle size, high density and poor rolling, and coke with large particle size and good rolling, the material line of the high-carbon ferromanganese blast furnace is selected below the touching point, so as to make the ores cloth to the edge and coke to the centre through the rebound cloth, which is conducive to the development of the centre of the coal gas flow.
Batch weight, refers to the weight of ore in each batch. The small batch weights the edge, and the big batch develops the edge. According to the smelting characteristics of high carbon ferromanganese blast furnace, small batch is generally used to increase the edge.
Charging order refers to the order of loading ore, coke and flux into the hopper in one batch. Ore is loaded first as positive loading (weighted edge), and coke is loaded first as inverted loading (development edge). In addition, there are sub-loading, semi-positive loading, semi-inverted loading and so on.
Fabricator working system, the use of fabricator is to make the charge in the blast furnace section of the distribution of a measure, it can also be used to correct the uneven fall of the charge and gas rise. High-carbon ferromanganese blast furnace usually use six-point type fabricator fabric, that is, each batch of material rotation 60 degrees.
Ferromanganese high iron manufacturers production practice has proved: ferromanganese blast furnace using deep material line, smaller material batch, positive loading or positive split loading-based charging system is conducive to furnace conditions downstream.
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