Treatment On Metal Drawing Wastewater

With the rapid development of the wire and cable industry,Drawing drawn wire used in the use of oil increasingly.Since the energy crisis and environmental crisis intensifies,energy saving,reduce the "three wastes" emissions imminent.Drawing oil makes the use,maintenance and wastewater treatment increasingly drawing attention.A lot of research work carried out both in China and abroad has been reviewed on the drawing wastewater,considering the status in enameled wire sectors of the domestic liquid waste drawing emission characteristics, proposed measures on maintenance and management of drawing oil and drawing liquid.Not only access the best processing results,but also extend the life of drawing greatly,reduce the number of replacement,reduce waste emissions,reduce production costs for enterprises.By measuring Electrical Materials Co.,Ltd.Shandong Dorset drawing liquid waste composition and the main content,demulsification use chemical method of drawing wastewater demulsification,comprehensive economic and environmental factors,choose a suitable electrolyte and flocculant and the identification of suitable experimental conditions.The conclusions are obtained as following:(1)With pH smaller,the alkaline metal and the alkali earth metal electrolyte emulsion breaker amount used were smaller.At pH=3,it did not need to join any emulsion breaker then emulsion breaking.The emulsion breaker amount used certainly did not increase along with the wiredrawing fluid density but remarkably increased.(2)Coagulant of PFS used demulsification,at pH=8.4,four hours was the best time for precipitation,adding 40ml of PFS to 1000mL wastewater,the treatment can result in clearer liquid of COD=480mg/L. After dealing with the water quality to achieve "wastewater discharge standards"(GB8976-1996)3 standards,reached the water quality requirements to enter the sewage treatment plant,the sewage treatment plant for disposal after discharge standards,comply with the environmental requirements.