direct iron process

用法例句

On the basis of comparing several kinds of new direct lead-smelting processes,the principles,technologies and their advantages of basic direct lead-smelting processes were described briefly,and the advances in the treatment of silver concentrate was also reported.

在比较了几种最新的直接炼铅法的基础上，着重地介绍了碱性直接炼铅法的原理、工艺流程及其特点，并报道了该法在银精矿处理中的应用研究情况。