The chemical contents in the sand quartz has reached national standards of silicon raw material for plate glass production after combined treating by magnetic separation plus diluted acid dipping.

采用磁选分离法+稀酸浸泡法联合处理后，使该地石英砂的化学成分达到了优质的生产平板玻璃用硅质原料的国家标准。

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This paper studied the chemical coagulation method in treating blast furnace gas washing wastewater and settled down the optimum conditions through experiments.

采用化学絮凝法处理高炉煤气洗涤水，通过实验确定了最佳的实验条件和工艺条件。

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In this paper, the method of treating harbor chemical wastewater by oxidation ditch process is presented.

试验证明，采用氧化沟法处理港口化学品污水是相当有效和切实可行的。

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