Purchase Zinc Concentratethe detail chemical contents requirement are as follows: Zn : 50 % ( 45 % of zinc reject to accept) Pb : 1.5 % S : 28 % Fe : 8 % SiO2 : 5 % The following information must be provided : 1:zinc concentrate specification and other mixture contents (Pb Fe As Sb SiO2) 2:the quantity/per month . 3:the method of payment 4:the origin of product 5:the shippment port If your offer and product quality are reasonable, we will sign a long-term contract with you! Looking forward to receiving your early contacting! Show More