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    • 4. 发明授权
    • Process and apparatus for the production of ferrochromium
    • 用于生产铬铁的方法和设备
    • US4981510A
    • 1991-01-01
    • US389591
    • 1989-08-04
    • Wilhelm JanssenKlaus Ulrich
    • Wilhelm JanssenKlaus Ulrich
    • C22B5/10C22B34/32C22C33/04F27B7/02F27B7/20F27B7/38F27D13/00
    • C22B5/10C22B34/32F27B7/02F27B7/2016F27B7/383F27D13/00
    • A process and apparatus for producing ferrochromium having a carbon content ranging from about 0.02 to about 10 weight percent includes providing a mixture comprised of iron-containing chromium ore, coal, and at least one slag former selected from each of a slag former of group (a) and a slag former of group (b), wherein the slag former of group (a) is selected from the group consisting of CaO and MgO, wherein the slag former of group (b) is selected from the group consisting of Al.sub.2 O.sub.3 and SiO.sub.2, and wherein the mixture has an ore or coal ratio ranging from 1:0.4 to 1:2. The mixture is heated in a rotary furnace for a period ranging from 20 to 240 minutes in a CO-containing atmosphere and at a temperature ranging from 1480.degree. to 1580.degree. C. to provide a reaction product. The reaction product is discharged from the rotary furnace in a doughy state and is cooled, either during or after discharging the reaction product from the rotary furnace, by mixing the reaction product with at least one additive effective for heating and decarbonation for a subsequent melting step, which at least one additive is at ambient temperature prior to being admixed, so that the mixture has a reduced temperature and is in a solid state as it is conveyed to a melting furnace. Finally, the mixture is melted in the melting furnace as a temperature ranging from 1600.degree. to 1700.degree. C. to obtain ferrochromium.
    • 一种用于生产碳含量范围为约0.02至约10重量%的铬的方法和设备包括提供由含铁铬矿石,煤和至少一种选自每一种炉渣形成器 a)和组(b)的成矿剂,其中组(a)的成矿剂选自CaO和MgO,其中组(b)的炉渣形成体选自Al 2 O 3和 SiO 2,并且其中所述混合物的矿石或煤比范围为1:0.4至1:2。 将混合物在含CO气氛中,在1480℃至1580℃的温度范围内,在旋转炉中加热20至240分钟,以提供反应产物。 反应产物以旋转炉状态从旋转炉中排出,并且在反应产物从旋转炉排放期间或之后通过将反应产物与至少一种对加热和脱碳有效的添加剂混合进行冷却,用于随后的熔融步骤 ,其中至少一种添加剂在混合之前处于环境温度,使得混合物具有降低的温度,并且当其被输送到熔炉时处于固态。 最后,将混合物在1600〜1700℃的温度下在熔融炉中熔融,得到铬铁。
    • 9. 发明授权
    • Producing stainless steels in parallel operated vessels
    • 在并联运行的容器中生产不锈钢
    • US06238453B1
    • 2001-05-29
    • US09117573
    • 1998-07-31
    • Lutz RoseHartmut VorwerkHorst KappesKlaus Ulrich
    • Lutz RoseHartmut VorwerkHorst KappesKlaus Ulrich
    • C21B1312
    • C21C7/0685C21C5/5264Y02P10/216
    • A process for producing stainless steels, particularly special steels containing chromium and chromium-nickel, in a smelting arrangement having at least two vessels, for supplying a steel foundry. A charge having mostly iron-containing raw scrap materials and partially carbon-containing alloy carriers is melted in a first vessel. At a temperature of 1460° C., the melt is decarburized by the injection of oxygen so as to reduce the carbon content to less than 0.3%. The melt is heated to a tapping temperature of between 1620° C. to 1720° C. and the carbon content is subsequently reduced to 0.1%. A second charge is melted in a second vessel simultaneously with the decarburizing of the first charge in the first vessel.
    • 一种生产不锈钢的方法,特别是含有铬和铬 - 镍的特殊钢,具有至少两个容器的冶炼装置,用于供应钢铁铸造。 主要是含铁原料废料和部分含碳合金载体的电荷在第一容器中熔化。 在1460℃的温度下,通过注入氧来使熔体脱碳,从而将碳含量降低到小于0.3%。 将熔体加热到1620℃至1720℃的出钢温度,随后将碳含量降低至0.1%。 第二电荷在第一容器中与第一电荷的脱碳同时熔化在第二容器中。