TH42569A - The process for producing molten iron. - Google Patents

Abstract

DC60 (25/05/43) A process for producing molten iron or primary iron products from iron-containing aggregates in a fusion gasifier(1) in which coal aggregates and oxygen-containing gases are fed in, and by the simultaneous release of reduction gases, the iron-containing aggregates are melted. The coal aggregates fed into the fusion gasifier(1) from above combine with the iron-containing aggregates to form a bed(6) in the fusion gasifier(1), and this results in the release of volatile hydrocarbons into a dome-shaped area(11) above the bed(6). A grind-fuel burner(15) is set diagonally from above toward the surface of the bed(6). The operation of the grind-fuel burner(15) in this case is controlled in such a way that the combustion of the carbon portions At least 40% of the carbon carriers in the form of fine particles are converted to CO2. The substance of this invention also includes a set of devices for carrying out this process. This invention provides the possibility of reducing the particulate matter load carried by the reduction gas from the fusion gasifier(1) and reducing the tendency of the remaining airborne particulate matter to be carried out. The process for producing molten iron or primary iron products from ferrous material in the form of aggregates in a fusion gasifier(1) in which the coal aggregate and oxygen-containing gas are fed in and the reduction gas is simultaneously introduced to melt the ferrous material. The coal aggregate fed into the fusion gasifier(1) from above combines with the ferrous material to form a bed(6) in the fusion gasifier(1) and, as a result, releases volatile hydrocarbons into the dome-shaped area(11) above the bed(6). A pulverized fuel burner(15) is set diagonally from above. To the surface of the bed(6), the operation of the fine-grained fuel burner(15) in this case is controlled in such a way that the combustion of the carbon portion of the fine particulate carbon carrier occurs in a proportion of at least 40% to CO2. The substance of this invention also includes a set of devices for carrying out this process. This invention makes it possible to reduce the particulate load carried by the reduction gas from the fusion gas generator(1) and to reduce the tendency of the remaining particulate matter to be carried away.

Claims (8)

1. The process for producing molten iron or primary iron products from iron-containing materials in the form of aggregates, such as partially and/or completely reduced porous iron, in a fusion gasifier. With the input of coal aggregates, and possibly other carbon-containing materials and oxygen-containing gases, and the simultaneous formation of reduction gases, the iron-containing material is melted, possibly after complete reduction. The coal aggregates are fed into the fusion gasifier from above and, together with the iron-containing material, form a bed. This releases volatile hydrocarbons into a dome-shaped space above the bed and into a grind-fuel burner. This burner, driven by fine-particle carbon carriers and oxygen-containing gases, passes through the fusion gasifier cells in approximately equal horizontal cross-sections of the dome-shaped space and is tilted diagonally from above towards the bed surface. A key characteristic is the operation of the grind-fuel burner. Fine grinding is performed using a carbon carrier in the form of fine particles, and a gas containing oxygen is controlled in a way that the combustion of the carbon portion of the carbon carrier in the form of fine particles occurs in a manner that conforms to a set precise ratio of at least 40%, converting it into CO2. As a result, the volatile hydrocarbons released from the coal are oxidized. 2. The process described in Claim 1 is characterized by the combustion of at least 50% of the carbon portion of the carbon carrier in the form of fine particles, resulting in CO2. 3. The process under claim 1 or 2 is characterized by the combustion of at least 70% of the carbon-containing fraction of the carbon carrier in the form of fine particles, into CO2. 4. A process under one of the claims 1 through 3, characterized by a finely ground fuel burner arranged in a manner in which turbulent flow for gas mixing is created within a dome-shaped area by the burner flame. 5. The process under any one of claims 1 through 4, characterized by the ability to create turbulent flow for gas mixing, involves placing a finely ground fuel burner along a twisted line in the same direction relative to the vertical center axis of the fusion gas generator. 6. Equipment for the production of molten iron or primary iron material from iron-containing aggregates, such as partially and/or completely reduced porous iron, with a fusion gasifier (1) with a feeder (2) for coal aggregates, a reduction gas discharge pipe (13) with a solid separator (14) for the resulting reduction gas, a gas pipe (4) for the oxygenated gas, a feeder (3) for the iron-containing material with outlets (10) for liquid slag (8) and molten iron (9), and a grind fuel burner (15). Each grind fuel burner (15) is equipped with a dust discharge pipe (17) for the fine particulate carbon carrier and a discharge pipe (18) for the oxygenated gas, and the lower part (7) of the fusion gasifier (1) is provided for receiving the molten iron (9) or iron material. The primary and liquid slag(8), the central part(5) for supporting the bedding(6) of coal aggregate and iron-containing aggregate, including the upper part(12) which is a dome-shaped area(11) and the grind fuel burners(15) penetrate the fusion gasification cells(1) in the horizontal cross-sectional plane of the dome-shaped area(11) and are arranged equally apart and tilted diagonally from above to the surface of the bedding(6). A key feature is that the coal aggregate feeder(2) is arranged in such a way that the coal aggregate feeding direction is aligned with the vertical central axis(19) of the fusion gasification(1), and the grind fuel burners(15) are arranged in the same direction tilted relative to the vertical central axis(19) of the gasification. The gas fusion (1) fine-compressed fuel burner (15), with a dust dispensing pipe (17) and a discharge pipe (18), is designed for the conversion of at least 40% of the carbon portion of the fine-compressed carbon carrier into CO2. 7. The equipment under claim 6 is characterized by the line of the arrangement of the pulverized fuel burner(15) in each case having the same perpendicular distance measured from the vertical center axis (19) of the fusion gas generator(1). 8. An apparatus according to claim 6 or 7, which is characterized by two to six fine-burner type burners (15), with the optimal number being four, which are spaced at equal distances, passing through the fusion gasification cell (1).