Case of fine particle ferrosilicon recovery in Xinjiang Zhongtai Chemical calcium carbide slurry

Object Introduction

About the Project

Xinjiang Zhongtai Chemical is one of the largest chlor-alkali chemical companies in China. The company is mainly engaged in chlor-alkali chemical products such as polyvinyl chloride resin (PVC), ion-exchange membrane caustic soda, and hydrochloric acid. The total production capacity is 1.3 million tons of polyvinyl chloride resin and 750,000 tons of ion-exchange membrane caustic soda. In the process of wet PVC production of calcium carbide, a large amount of calcium carbide slurry is produced every day, and 2-3% of fine-grained ferrosilicon is contained in the calcium carbide slag. This project is our patent project, using our TPC-800 vertical continuous cyclone centrifuge to recover fine-grained ferrosilicon and residual carbon in calcium carbide slurry.

Method

• •The high-efficiency recovery technology is used to enrich and utilize the bottom-flow slag ferro-iron particles; it is required to design an automatic sorting device to replace the labor-intensive manual flushing and recycling method. Reduce labor intensity and effectively prevent potential safety hazards;
• •Using high-efficiency recovery technology-centrifugal re-election technology to enrich and utilize the overflow fine-grained ferrosilicon; reduce the wear of high-hardness impurities in the calcium carbide slag on the filter cloth and pipe valve system of the subsequent filter-filter section;
• • The jigging screening recovery system is used to separate the carbon particles in the calcium carbide slurry, recover the high-quality clean fuel and reducing agent, and realize the comprehensive utilization; in the technology of replacing the limestone with calcium carbide and producing cement clinker , in the calcium carbide slag the ferrosilicon particles have a direct impact on the output of the cement raw mill and the loss of the grinding body. The reduction of the ferrosilicon content can achieve better economic benefits and save a lot of energy and resources for the society