Testing data of mercury-free dry batteries in the past two years was analyzed.

Recovery of zinc and manganese from waste dry batteries and electrodeposition with the recovered solution;

The article summarizes disposal technology of hydrargyrum,analyses disposal technics of hydrargyrum on recycling waste dry batteries, and puts forward a new technique for dissolving,vulcanizing and incinerating to dispose hydrargyrum of waste dry batteries.

At that time,according to input-output relation of operational amplifier,a dry battery was used to produce a fixed voltage to simulate the input signal and then make the oil mist detector work normally.

Analysis was carried on the errors of dry battery voltage measured by using differnt models of voltmeter.

The action of mercury in treating waste dry battery was investigated.

Contraposing to the disadvantages of several disposing processes of waste dry battery at home and abroad,this paper puts forword a new process to dispose of waste dry batteries with vacuum chloridizing roasting.