深海锰结核以煤代焦还原熔炼新工艺研究

New technology of deep-sea manganese nodule smelting with coal instead of coke

针对锰结核焦炭还原熔炼成本高、焦炭生产过程环境污染严重等问题,作者提出了锰结核以煤代焦还原熔炼新工艺,对减少锰结核冶炼环境污染、降低冶炼成本,具有积极意义。以东北太平洋中部深海锰结核为原料,对还原温度、还原时间、硅石加入量、无烟煤加入量对锰结核中Co、Ni、Cu、Fe、Mn回收率的影响进行了研究。结果表明:500 g锰结核矿样加入60 g无烟煤粉、5 g硅石粉,在1300℃下反应40 min,Co、Ni、Cu、Fe进入合金的回收率分别为99.49%、99.83%、98.59%、97.39%,Mn进入渣中的回收率为97.84%。

Aiming to solve the current problem of high cost and environmental pollution in coke reduction smelting of manganese nodules,a new process of reducing smelting manganese nodules with coal instead of coke is proposed.This process showed a positive impact toward reducing the environmental pollution and smelting cost of manganese nodules.Process parameters that effect the recovery of Co,Ni,Cu,Fe,and Mn,such as reduction temperature,re-duction time,and the addition of silica and anthracite,were investigated.The experimental results showed that re-coveries of Co,Ni,Cu,Fe into the alloy are 99.49%,99.83%,98.59%,and 97.39%,respectively,and the recovery rate of Mn into slag is 97.84%.Metals were recovered from manganese nodules with a mixture of 500 g manganese nodules,60 g anthracite coal,and 1 g silica powder at 1300℃for 40 min.