Aimed at utilization of iron resources in pyritic slag,the study on production of metallized agglomerate with pyritic slag through coal based DR process was conducted.

为合理利用硫酸烧渣中的铁资源，进行了煤基直接还原属化团块的研究，提出了润磨造球-热焙烧-磁选-冷固结成型的新工艺。

This rock contained chalcedonic cement before it underwent diagenesis, a process where low temperatures and low pressures alter the content of sediments before they finally lithify, or turn into rock.

它经历成岩作用之前，它含有燧石质的胶结成分。成岩作用过中，低温抵压改变了沉积物的成分，而后固结成岩。