CAJ | 학술논문

研究了某褐铁矿层红土矿加压酸浸处理工艺，通过小试确定了各工艺过程的最佳条件．加压酸浸：温度为255℃，加酸量为250 kg/t，时间为60 min，矿浆体积分数为30％，镍、钴浸出率分别为98．23％和98．77％；矿浆中和：终点pH为1．5～2．0，时间为60 min，温度为90℃；溶液处理采用两段除杂法：用氢氧化钠进行镍、钴沉淀，终点pH为7．6，得到了氢氧化镍钴中间产品；用氧化钙沉淀废水中的金属离子，使废水达到排放要求．
연구료모갈철광층홍토광가압산침처리공예，통과소시학정료각공예과정적최가조건．가압산침：온도위255℃，가산량위250 kg/t，시간위60 min，광장체적분수위30％，얼、고침출솔분별위98．23％화98．77％；광장중화：종점pH위1．5～2．0，시간위60 min，온도위90℃；용액처리채용량단제잡법：용경양화납진행얼、고침정，종점pH위7．6，득도료경양화얼고중간산품；용양화개침정폐수중적금속리자，사폐수체도배방요구．
This paper mainly studied the technology of recovery of nickel and cobalt from laterite with high pressure acid leaching.The optimum conditions were determined.In the processing of pressure acid leaching,the nickel and cobalt leaching rate reached 98.23% , 98. 77% ,respectively,in the condition of temperature 255 ℃ ,the acid consumption 250 kg/t ore,the reaction time 60 min and pulp density 30% .The best conditions for pulp neutralization are:the end point pH 1.5-2.0,the reaction time 60 min,the temperature 90 ℃ .The solution was treated by two-stage process and end pH is 7. 6. Intermediate products of nickel and cobalt hydroxide were produced.After treating with calcium oxide, the wastewater could be discharged eligibly.