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从相组成及热力学角度对红土矿焙烧重油烯料中的硫的行为及其对镍粉质量的影响进行了研究。实验表明,几乎重油中所有的硫均为矿石中的CaCO_3吸收并形成CaSO_4,后者在还原过程中又生成CaS,这正是氨浸工序中不饱和硫的来源。若在高压氢还原工艺前不进行不饱和硫的氧化,则其将以Ni_3S_2形式进入镍粉,致使镍粉中的总硫量超出市售商用镍粉的含硫量。
The behavior of sulfur in burnt heavy oil olefins from laterite phase and its thermodynamics on the quality of nickel powder were studied. Experiments show that almost all sulfur in heavy oil is absorbed by CaCO3 in the ore and forms CaSO4, which in turn generates CaS during the reduction process, which is the source of unsaturated sulfur in the ammonia leaching process. If the oxidation of unsaturated sulfur is not performed prior to the high-pressure hydrogen reduction process, it will enter the nickel powder as Ni_3S_2 resulting in the total sulfur content in the nickel powder exceeding the sulfur content of commercial commercial nickel powder.