The Environmental Performance Of The Panzhihua Iron And Steel Cold-rolled Products In The Coating Process

Cold-roll products are usually covered with paint in order to increase their surface quality and corrosion resistance. In the past, because people didn't make a point of environmental protection and only made a point of production yield and production cost etc. when they produced cold-roll steel sheets(including cold-roll bare steel sheets and zinc coat steel sheets). They possibly used lots of pollution materials which contained lead and six price chrome etc. When people used cold-roll steel sheet to cover with paint. They possibly used lots of pollution materials which contained nitrite and nickel and thich acid and thich alkali and organic solvate etc. These pollution materials caused pollution of the environment.Appliance product is brung up more and more high environmental protection request by people with increasing of people's living level. Environmental protection condition during covering with paint on cold-roll steel sheet will directly decide environmental protection function of appliance product. Now PanGang cold-roll factory is the big door which produces appliance steel sheet at local. It is necessary to increase environmental protection function of PanGang cold-roll product.Environmental protection function of covering with paint product is not only related with the primitive steel sheet but also related with craft and material of covering with paint. This text researched from below both side. One, PanGang cold-roll factory used the different primitive steel sheets to produce products and evaluation and improve their environmental protection function. Two, PanGang and customers used the different craft and material of covering with paint to produce products and evaluation and improve their environmental protection function.Research result enunciation: One, PanGang cold-roll primitive steel sheets didn't contain contaminative material. Two, emulsify oil and neat liquid and light liquid and defend rust oil didn't contain contaminative material too. Steel sheets surface were very sweep after these material were used. Three, little PanGang cold-roll zinc coat steel sheets contained lead and six price chrome. They were products of one number zinc coat line and six price chrome resist fingerprint zinc coat steel sheets of two number zinc coat line. Lots of PanGang cold-roll zinc coat steel sheets didn't contain lead and six price chrome. They were environmental protection type products. PanGang cold-roll factory continuously lowered lead and six price chrome measure in it' products to extend comparison of environmental protection type product. Four, lots of customers used environmental protection type product and owned equipment to handle dirty water and waste gas when they used PanGang cold-roll product to degrease and phosphorate and cover with paint. Their environmental protection function was very good. but few customers's environmental protection function was bad. PanGang has already established extensive contact with customers to help them to increase their environmental protection function.