The PVC production in China mainly uses the calcium carbide process today.Producing one ton of calcium carbide generates 1.1 tons of carbide slag.Using carbide slag to produce cement is the most matured and most eco-nomical method in utilization of carbide slag.It can reduce natural limestone resources needed in the cement production,cut down The PVC production in China mainly uses the calcium carbide process today. Producing one ton of calcium carbide generates 1.1 tons of carbide slag. Using carbide slag to produce cement is the most matured and most eco-nomical method in utilization of carbide slag. reduce natural limestone resources needed in the cement production, cut down