Zinc electrolytic industry

Case Detail

Customer name: Dongfang Hope Nonferrous Metals Co., Ltd 

The Dongfang Hope Nonferrous Metals Co., Ltd. is one of the larger projects of Xinjiang Dongfang Hope Nonferrous Metals Co., Ltd.

According to the customer's situation, we choose the SCR with low voltage of the on-state threshold, so as to reduce the power consumption and improve the rectification efficiency. Minimize the number of parallel elements of the rectifier bridge arm. Due to the inconsistent characteristics of SCR, the on-state threshold voltage of each SCR cannot be exactly the same, which results in the imbalance of conductivity coefficient between parallel elements of the rectifier bridge arm. The more parallel elements, the greater the imbalance gap. Therefore, SCR with large forward average current is selected as far as possible to reduce the number of parallel elements of the rectifier bridge arm and improve the current sharing coefficient of the rectifier bridge arm. A homogenized current reactor is used for forced current sharing. A low-power current sharing appliance developed by our company is added between two SCR on the same bridge arm for forced current sharing. The current sharing coefficient is up to 0.96, which improves the rectification efficiency and makes the electrolytic zinc produced with high quality.

The project can produce 2×500,000 tons of electrolytic zinc annually. There are 8 rectifier units in the first electrolysis series; 8 rectifier units in the second electrolysis series. For this project, our company provided 16 sets/32 sets of KES-2×41KA/1570V rectifier cabinets, 16 sets of KZX10-12 unit current stabilization control cabinets, 2 sets of ZX-110 series master control panels, and 2 sets of power grid stability control devices. 2 sets of ZL-200 host computer rectification automation monitoring system.