摘要:
A method for manufacturing coal briquettes which are charged into a dome part of a melter-gasifier to be rapidly heated in a manufacturing apparatus of molten iron including the melter-gasifier in which reduced iron is charged, and a reducing furnace connected to the melter-gasifier and providing the reduced iron is provided. The method for manufacturing coal briquettes includes: i) providing fine coal; ii) calcinating a carbon source; iii) providing a mixture obtained by mixing the fine coal and the calcined carbon source; and iv) providing coal briquettes by molding the mixture. In the providing of the mixture, the amount of carbon source may be more than 0 and 30wt% or less of the mixture.
摘要:
Disclosed are an apparatus and a method for manufacturing molten iron. The apparatus for manufacturing molten iron according to the present invention includes: a multi-stage fluidization furnace for converting a fine iron ore into a fine direct reduced iron by reduction; at least one high temperature agglomerating apparatus for pressing the fine direct reduced iron to manufacture a high temperature agglomerate; at least one pulverizing apparatus for pulverizing the high temperature agglomerate to a predetermined particle size; a first transporting apparatus for transporting the pulverized high temperature agglomerate; and a melting furnace for melting the transported high temperature agglomerate by combusting a powder-type or agglomerate-type steam coal and supplying a reduced gas generated in the furnace to a fluidization reduction furnace. Further, at least one agglomerate storing bath for storing a portion of the pulverized high temperature agglomerate is further included. The molten iron can be stably and efficiently manufactured by applying the present invention.
摘要:
A method and an apparatus for manufacturing coal briquettes capable of implementing excellent cold strength and hot strength by separating and crushing coal per each kind of coals are provided. In the manufacturing method of coal briquettes, the coal briquettes are charged into a dome part of a melter-gasifier to be rapidly heated in a manufacturing apparatus of molten iron including i) a melter-gasifier in which reduced iron is charged, and ii) a reducing furnace connected to the melter-gasifier and providing the reduced iron. The manufacturing method of coal briquettes includes: i) providing a plurality of kinds of coal; ii) storing the plurality of kinds of coal, respectively; iii) providing powdered coals by crushing the plurality of kinds of coal, respectively; iv) providing mixtures by mixing the powdered coal, a hardening agent, and a binder; and v) providing coal briquettes by molding the mixture.
摘要:
Coal briquettes having excellent hot strength and a manufacturing method thereof are provided. The method for manufacturing coal briquettes includes: i) providing powdered coals; ii) providing graphite suppressing hot differentiation of the coal briquettes; iii) providing a hardening agent and a binder; iv) providing a mixture by mixing the powdered coals, the graphite, the hardening agent, and the binder; and v) providing the coal briquettes by molding the mixture. In the providing of the mixture, a ratio of the amount of graphite to the sum of the amount of powdered coals and the amount of graphite is greater than 0 and 0.3 or less.
摘要:
A method for manufacturing coal briquettes charged into a dome part of the melter-gasifier to be rapidly heated in an apparatus for manufacturing molten iron including a melter-gasifier into which reduced irons are charged, and a reducing furnace connected to the melter-gasifier and providing the reduced iron. The method for manufacturing coal briquettes include i) providing fine coal; ii) preparing a mixture by mixing a hardening agent of 1 to 5 parts by weight and a binder of 5 to 15 parts by weight with respect to fine coals of 100 parts by weight; and iii) molding the mixture. In the providing of the fine coal, the fine coals include low-grade coal of more than 0 and 50wt% or less and remaining carbonaceous materials. The low-grade coal has a volatile matter (on a dry basis) of 25wt% to 40wt% and a free swelling index of more than 0 and less than 3.