Improvement of wear-resistant materials used in dense-medium separator in Linxi coal preparation plant

The pipes of dense-medium separator and walls of some collecting boxes always be worn out in Linxi coal preparation plant.To resolve these problems,adopt KMTBCr26 high chromium cast iron wear-resistant pipes and Al2O3 ceramic-lined composite pipes.Analyse the technical parameters and performance of these two pipes.The results show that,the abrasive resistance of the latter is better than that of the former,while the welding property is poorer,its link rely on flanged links,that leads to large amount of maintenance.So adopt the former at last.Replace the worn-out part of aerating agitation device,the pipes of underflow in gangue picking process,manganese steel lining of clean coal collecting box as well as various of damageable pipes with the KMTBCr26 high chromium cast iron,these measures prolong the service life of equipments,decrease the maintenance and cost,increase the clean coal yield,investigate the economic benefits with annualized cost estimates method,the method helps to save cost 19012 yuan per year.