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    • 5. 发明授权
    • Process for making agents for desulfurizing crude iron or steel melts
    • 制造粗铁或钢熔体脱硫剂的方法
    • US4400292A
    • 1983-08-23
    • US359229
    • 1982-03-18
    • Albert BraunWilli PortzGeorg StraussHans-Martin Delhey
    • Albert BraunWilli PortzGeorg StraussHans-Martin Delhey
    • C21C1/02C21C7/064C21C7/076C01B31/32
    • C21C1/025C21C7/0645
    • The disclosure relates to a process for the manufacture of desulfurizing agents containing 1-6 weight % chemically combined water, based on calcium oxide and carbon-containing calcium carbide, for crude iron and steel melts. More particularly, the disclosure provides for a molten mixture of calcium carbide and calcium oxide containing 20 to 80 weight % CaO to be made from lime and coke; for the mixture to be allowed to cool and solidify into a block; for the solidified block while it still has an average temperature of more than 400.degree. C. to be crushed to particles with a size of less than 150 mm; for the comminuted mixture, which still has a temperature of at least 400.degree. C. to be admixed with a quantity of calcium oxide necessary to establish in the resulting mixture a total content of CaO corresponding to the CaO content desired in the end product; and for the mixture to be gound while intensively mixing it with free carbon and carbonate in the presence of air or nitrogen with a moisture content of 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.
    • 本公开内容涉及一种用于生产含有1-6重量%化学结合水的脱硫剂的方法,其基于氧化钙和含碳的碳化钙,用于粗钢和钢熔体。 更具体地,本公开提供了由石灰和焦炭制成的含有20至80重量%的CaO的碳化钙和氧化钙的熔融混合物; 使混合物冷却并固化成块; 对于固化块,同时其平均温度大于400℃被粉碎成尺寸小于150mm的颗粒; 对于粉碎的混合物,其仍然具有至少400℃的温度,以与在所得混合物中建立相应于最终产物中所需的CaO含量的CaO的总含量相配合的一定量的氧化钙。 并且在空气或氮气存在下,在低于100℃的温度下,将水分含量为5至20g / m 3(在1.013bar和273.15K)下,将混合物与游离碳和碳酸盐剧烈混合。 到尺寸小于10毫米的颗粒。
    • 6. 发明授权
    • Production of agent for desulfurizing crude iron and steel melts
    • 生产用于脱硫粗钢和钢熔体的试剂
    • US4318822A
    • 1982-03-09
    • US149745
    • 1980-05-14
    • Albert BraunWilli PortzGeorg Strauss
    • Albert BraunWilli PortzGeorg Strauss
    • C21C1/02C21C7/064C21C7/076C01B31/32
    • C21C1/025C21C7/0645
    • The invention relates to the production of an agent for desulfurizing crude iron and steel melts, the desulfurizing agent being based on calcium carbide containing calcium oxide. To this end, a calcium carbide/calcium oxide/starting melt mixture with a CaO-content within the range 20 to 80 weight % is produced from lime and coke and allowed to solidify to a block. While the solidified block still has an average temperature of more than 400.degree. C., it is crushed to particulate material with a size of less than 150 mm. Next, the hot crushed material of at least 400.degree. C. is admixed with a quantity of calcium oxide necessary to have in the resulting mixture an overall content of CaO corresponding to that desired for the final product. The whole is thoroughly mixed and crushed with exclusion of moisture at temperatures higher than 100.degree. C. to particulate material with a size of less than 10 millimeters.
    • 本发明涉及用于脱硫粗铁和钢熔体脱硫剂的脱硫剂,该脱硫剂是以含有氧化钙的碳化钙为基础的。 为此,由石灰和焦炭产生CaO含量在20至80重量%范围内的碳化钙/氧化钙/起始熔融混合物,并使其固化成块。 虽然固化块仍然具有超过400℃的平均温度,但是它被粉碎成尺寸小于150mm的颗粒材料。 接下来,将至少400℃的热粉碎材料与必需的一定量的氧化钙混合,使得所得混合物中的总含量相当于最终产品所需的CaO的总含量。 将整体充分混合并粉碎,将温度高于100℃的水分排除到尺寸小于10毫米的颗粒材料上。
    • 9. 发明授权
    • Production of calcium carbide
    • 生产电石
    • US4391786A
    • 1983-07-05
    • US301836
    • 1981-09-14
    • Hans-Joachim KerstingErhard WolfrumWilli PortzGeorg Strauss
    • Hans-Joachim KerstingErhard WolfrumWilli PortzGeorg Strauss
    • C01B32/942C01B31/32
    • C01B31/32Y02P20/129
    • The invention relates to a process for making calcium carbide by reacting an excess of coke with quicklime in the presence of oxygen in an oxygen-thermal furnace. To this end, the invention provides for precrushed coal to be used as starting material for coke and precrushed lime hydrate (Ca(OH).sub.2) or precrushed limestone (CaCO.sub.3) to be used as a starting material for quicklime. The precrushed materials are mixed and the resulting mixture is introduced into a drying zone and freed therein at 80.degree. to 120.degree. C. from adhering water. Next, the warm mixture coming from the drying zone, and air, are introduced into a calcining apparatus in which the coal constituent is coked and the lime constituent is simultaneously dehydrated or decarbonized, at temperatures of 900.degree. to 1400.degree. C. The thermally-pretreated mixture of starting materials with an inherent temperature of 900.degree. to 1000.degree. C. is then directly introduced into the oxygen-thermal furnace and reacted with oxygen to calcium carbide.
    • 本发明涉及通过在氧热炉中在氧气存在下使过量的焦炭与生石灰反应来制造碳化钙的方法。 为此,本发明提供了用作焦炭和预煅烧石灰水合物(Ca(OH)2))或预煅烧石灰石(CaCO3)原料的预煅烧煤作为生石灰的起始原料。 将预先冲洗的材料混合,将所得混合物引入干燥区,并在80-120℃下从附着水中释放出来。 接着,将来自干燥区域的空气和空气的温度混合物引入煅烧装置中,在900℃〜1400℃的温度下,将煤成分焦化,同时进行脱水脱碳。 然后将固有温度为900〜1000℃的原料预处理混合物直接引入氧热炉中,并与氧气反应成电石。