This paper proposes an expert control and fault diagnosis scheme for the leaching zinc process, which concerns determining and tracking the optimal pHs of the leach overflows, and ensuring the safe running of the process.

The effect of the additives on the electro-crystal behavior of electroplating copper and the zincate process have also been investigated.

The leaching process of ores in the same deposit can be simulated.

The relationship between the amount of input output of the leaching process and the amounts of H ∞ control, and its physcial significance are also discussed.

Introduction is given to experiment on changing reaction zone lining into Mg Cr Al bricks in volatilization kiln for treating zinc leaching residue and practice for achieving domestic leads in same industry after continuous operation for 244 days by using this kind of brick lined volatilization kiln.

,twostage rosting-weak acid leaching and pressure leaching,that have achieved good results with zinc leaching rates of above 96% and iron leaching rates of around 50% and shown good prospect for future industrialization.