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Rolling wastewater is a common type of industrial waste water , which are the main pollutants in the steel surface spray cooling process into the system iron oxide ( crumbs ) and the lubrication points of oil spills, oil leakage caused by the oil class shock loading. In this paper, heavy steel wire plant sank tank effluent as the research object , its existing reuse systems for suspended solids and oils seriously overweight problem , this paper focus on research in which SS and oil removal methods related research at home and abroad , to take coagulation tests were carried out to remove suspended solids and oil testing , to address the wastewater treatment and reuse issue basis. Test uses six stirring instrument for coagulation associated conditions determined by a single factor , orthogonal experiment to determine the optimal conditions for each factor and its significance , that the best conditions . Through a lot of testing to determine the parameters of the coagulation process optimum conditions are as follows: coagulant PFS, the dosage is 10mg / L, coagulation stirring intensity 300r/min, coagulant mixing time 60s, slowly stir strength 80r / min, slow stirring time 5min, precipitation time 10min, pH 8 , in the raw water under the conditions of the SS from the 274mg / L down to 2.13mg / L, the oil from the 25mg / L reduced to 4.59mg / L, effective solution to the water the problem of excessive suspended solids to meet the rolling water circulating cooling water requirement for solving the wastewater treatment and reuse issue basis . Through chemical screening and parameter optimization to determine the best conditions for good results except SS and shock load capability is very good, although the oil standard , but the water effects are not stable, and influenced by changes in water quality . Recommendations for further work : In the coagulation process based on the added filtration process , the use of quartz sand , ceramic , walnut shells , and new fiber filter for filtering. Filtration process 's main objective is to remove heat turbid circulating water emulsified oil, ensure water effect . In this study, circulating cooling water for the rolling treatment and reuse engineering practice with reference and guidance .
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