As a kind of by-product in refinery, petroleum coke has not been effectively used for a long time. And many researchers try their best to develop it.
石油焦作为一种迄今为止还未得到有效利用的石油炼制副产物，多年来一直是人们努力开发的对象。
2
The reason of low recovery rate of tar in cokeproduct was analyzed; the recovery rate of tar was increased by decreasing the oven-roof temperature and adjusting operating conditions.