Structure for blast furnace hearth
专利汇可以提供Structure for blast furnace hearth专利检索，专利查询，专利分析的服务。并且PURPOSE: To make the diameters of pores in carbonaceous brick as small as not larger than 5μ so as to prevent the loss by melting of the brick caused by the invasion of molten cast iron, by, in manufacture of the carbonaceous brick used for the well of the blast furnace hearth, addn. of finely powdered metallic silicon to the carbonaceous raw material.
CONSTITUTION: The bricks 2 which constitute inner surface of the well of a blast furnace hearth under the tuyere are made of carbonaceous material. In the manufacture of the carbonaceous brick, a small quantity of finely powdered metallic silicon is added to the carbonaceous material, e.g., graphite, anthracite etc., of controlled particle size. The mixt. is extrusion molded into a specific shape, and is then calcined in a firing furnace at 1,300°C. The metallic silicon present among the carbon particles reacts with the atmosphere component at a high temp. and forms Si-N-O composites in the pores. The Si-N-O composites divide, subdivide, and blockade the connected pores in the brick, making the diameter of the pores as small as not larger than 5μ. Consequently, only a small quantity of the brick is lost by melting because of the invasion of cast iron, hence the service life of the well is extended.
COPYRIGHT: (C)1980,JPO&Japio，下面是Structure for blast furnace hearth专利的具体信息内容。
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