Method for jointly treating high-fluorine sewage by utilizing waste slag

• Main Authors: SHI ZHIHUI, WANG ZHIYONG, LANG SHENGLI, LIAO XUEJIAN, DUAN ZHIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 21.10.2009
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a method for jointly treating high-fluorine sewage by utilizing waste slag, which comprises the following steps: (1) carbide slag, pulverized fuel ash and red mud are added into a treatment pond containing the high-fluorine sewage and sent into an overflow pond after being stirred and reacting for 10-20 minutes, and clear liquid in the overflow pond flows into a reaction pond; (2) the carbide slag is added into the reaction pond, and the pH is regulated to 9-10; after 10-20 minutes of reaction, a coagulating agent is added to the clear liquid, and the pH is regulated to 6-7.5; after 10-20 minutes of reaction, a coagulant aid is added to the clear liquid; and after 10-20 minutes of reaction, the clear liquid is filtered and drained. The method uses the industrial waste slag for treating the high-fluorine sewage so as to ensure that the fluorine content in the treated sewage conforms to an environmental protection standard specified by the nation, thus the pollution of the high-fluorine s