Application of rental dross in phosphatic coldly hardening mixtures for making of forms lost wax process

Basic technological properties of experimental phosphatic are investigational mixtures on the basis of quartz sand and rental dross for making of forms lost wax process. Influencing of maintenance of dross and phosphoric is certain acids on technological properties of mixtures. Technology of cold of coverage is developed quartz sand by powder of oxides of iron, and also experimental composition increasing is got adhesion of molding material to the waxen model. It is set that experimental composition abbreviates production inputs and duration of technological process of making of forms casting. The offered technological process provides the increase of stability to appearance of cracks at thecal forms, diminishing of time of drying and cycle of treatments by a high temperature of shells.