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    • 15. 发明授权
    • Method of making iron and steel
    • 钢铁制造方法
    • US6149709A
    • 2000-11-21
    • US26683
    • 1998-02-20
    • Akira UragamiShuzo ItoKoji Tokuda
    • Akira UragamiShuzo ItoKoji Tokuda
    • C21B13/00C21B13/10C21B13/14C22B15/00C21C7/076
    • C21B13/105C21B13/0046C21B13/14Y02P10/136Y02P10/216
    • Molten iron is prepared by (1) providing iron oxide and a carbonaceous reducing agent, (2) preparing a shaped product from the carbonaceous reducing agent and the iron oxide, (3) preparing solid reduced iron from the shaped product, wherein the solid reduced iron has a metallization of at least 60%, a specific gravity of at least 1.7, and a carbon content of at least 50% of the theoretical amount required for reducing the iron oxide remaining in the solid reduced iron, and, (4) before substantial cooling occurs, heating the solid reduced iron in an arc heating-type melting furnace at a high temperature. The molten iron can be prepared efficiently from iron ores of relatively low iron content without causing erosion of refractories, at high energy and high reduction efficiencies, and by a simple operation in a simple facility.
    • 熔融铁通过(1)提供氧化铁和碳质还原剂制备,(2)从碳质还原剂和氧化铁制备成形产品,(3)从成形产品制备固体还原铁,其中固体还原 铁具有至少60%的金属化,比重至少为1.7,并且碳含量为减少固体还原铁中剩余的氧化铁所需的理论量的至少50%,以及(4)之前 发生大量冷却,在高温下在电弧加热型熔炉中加热固体还原铁。 可以从铁含量较低的铁矿中高效地制备铁水,而不会在高能量和高还原效率的情况下通过简单的操作来引起耐火材料的侵蚀。
    • 16. 发明授权
    • Mold fluxes used in the continuous casting of steel
    • 在钢的连续铸造中使用的模具助熔剂
    • US5577549A
    • 1996-11-26
    • US421151
    • 1995-04-10
    • Royston J. PhillipsSpencer C. Diehl
    • Royston J. PhillipsSpencer C. Diehl
    • C21C7/076B22D11/10B22D11/108B22D11/111
    • B22D11/111
    • A mold flux for the continuous casting of steel (including ultra low carbon steel) comprises refractory metal oxide, at least one fluxing agent, a binder, and expandable graphite in the amount of 0.3-1.0% by weight, the expandable graphite having a size less than about 80 mesh, and the flux in the form of spherical granules 200-500 microns in diameter. The binder typically comprises between about 8-14% weight soda ash, or between about 4-7% by weight lithium carbonate, or a combination of soda ash and lithium carbonate wherein double the percentage of lithium carbonate plus the percentage of soda ash is between about 8-14%. The flux may additionally include--especially where ultra low carbon steel is being continuously cast--starch and MnO.sub.2 to reduce slag rim, improve thermal insulation, and reduce carbon pickup.
    • 用于钢(包括超低碳钢)的连续铸造的模具助熔剂包括0.3-1.0重量%的难熔金属氧化物,至少一种助熔剂,粘合剂和可膨胀石墨,所述可膨胀石墨的尺寸 小于约80目,直径为200-500微米的球形颗粒形式的助熔剂。 粘合剂通常包含约8-14重量%的苏打灰或约4-7重量%的碳酸锂,或苏打灰和碳酸锂的组合,其中碳酸锂的百分比加上苏打灰的百分比在 约8-14%。 助焊剂可以另外包括 - 特别是在连续铸造超低碳钢 - 淀粉和MnO2以减少炉渣边缘的情况下,改善隔热性,并减少碳吸收。
    • 20. 发明授权
    • Process for the manufacture of desulfurizing agents for crude iron or
steel melts
    • 制造粗铁或钢熔体脱硫剂的方法
    • US4368071A
    • 1983-01-11
    • US222086
    • 1981-01-02
    • Albert BraunWilli PortzGeorg StraussHans-Martin Delhey
    • Albert BraunWilli PortzGeorg StraussHans-Martin Delhey
    • C21C1/02C21C7/064C21C7/076C21C7/02
    • C21C1/025C21C7/0645
    • The present invention relates to a process for the manufacture of desulfurizing agents containing 1-6% by weight of chemically bonded water, based on calcium oxide-containing calcium carbide, for crude iron and steel melts. To this end, a molten mixture of calcium carbide and calcium oxide with a CaO content of 20 to 80% by weight is produced, which is allowed to solidify into a block. Next, the block which still has an average temperature of more than 400.degree. C., is rough-crushed to particles with a size of less than 150 mm and calcium oxide is added to the comminuted mixture, which still has a temperature of at least 400.degree. C., in accordance with the CaO content desired in the end product. The mixture is finally ground in the presence of air or nitrogen with a moisture content of from 5 to 20 g/m.sup.3 (at 1.013 bar and 273.15 K) at temperatures below 100.degree. C. to particles with a size of less than 10 mm.
    • 本发明涉及一种用于生产含铁1-6重量%化学键合水的脱硫剂的方法,所述化学键合水基于含氧化钙的碳化钙,用于粗钢和钢熔体。 为此,产生CaO含量为20〜80重量%的碳化钙和氧化钙的熔融混合物,使其固化成块状。 接下来,将平均温度超过400℃的块粗粉碎成尺寸小于150mm的颗粒,并将氧化钙加入至粉碎的混合物中,该混合物至少具有至少的温度 400℃,根据最终产品中所需的CaO含量。 在空气或氮气存在下,将混合物最终在低于100℃的温度下在5至20g / m 3(在1.013巴和273.15K)的水分下研磨至尺寸小于10毫米的颗粒。