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一、矿石特性我厂所用銅鎳硫化矿的鎳銅比=2:1,矿石所含主要金属矿物依次为磁黄鉄矿、鎳黄铁矿、黄銅矿和磁铁矿等。脉石有橄欖石、蛇紋石、輝石等。含鎳矿物除鎳黃铁矿外,磁黄铁矿中也含有少量的鎳。这些矿物的最大特点是含硫低,合氧化鎂高。因此,将矿石依其結构分为三种,其一是浸染状矿石,含鎳小于2%,硫化物粒度小于2毫米,先經浮选降低氧化鎂,选出精矿再烧結,送入鼓风炉;其二是致密硫化块矿,硫化物平均粒度大于6毫米,含鎳大于4%,簡称一級富矿;另一是海綿状鏡铁矿石,含鎳2～4%,簡称二級富矿。后两者均要求破碎到250毫米以下,直接入炉,其化学成分載于表1。
First, the ore characteristics I used copper-nickel sulfide plant in the copper-copper ratio = 2: 1, the ore contains the main metal minerals followed by Magnetite, pentlandite, chalcopyrite and magnetite. Gangue olivine, serpentine, pyroxene and so on. Nickel-bearing minerals In addition to nickel pyrrhotite, pyrrhotite also contains a small amount of nickel. The most prominent feature of these minerals is low sulfur, magnesium oxide high. Therefore, the ore is divided into three according to its structure, one is disseminated ore, containing less than 2% nickel, sulfide particle size less than 2 mm, the first by the flotation to reduce magnesium oxide, selected concentrate and then sintered Blast furnace; the second is dense sulfide lump ore, the average particle size of sulfide is greater than 6 mm, containing more than 4% nickel, referred to as a rich ore; the other sponge-like mirror iron ore, containing nickel 2-4% Rich ore. The latter two require crushing to 250 mm below, directly into the furnace, its chemical composition is shown in Table 1.