HQY1+HQY2 can totally replace potassium dichromate on copper-lead ore flotation. 

Potassium dichromate is a toxic and carcinogenic strong oxidant. 

At present, people use other chemcials to replace potassium dichromate, but those chemcials alway reduce the effect of beneficiation. 

A copper-lead ore in Mongolia uses potassium dichromate as inhibitor, the previous copper concentrate grade is 16%. 

On the test, our new environmentally friendly Combination agent HQY1+HQY2 can totally replace potassium dichromate, and the copper concentrate grade reach 18%.