METHOD OF MANUFACTURE OF STONE-CAST PRODUCTS Russian patent published in 1994 - IPC

FIELD: production of building materials. SUBSTANCE: in the method of manufacture of stone-cast products by preparation of melt and casting of it in moulds in the initial stage the melt is prepared from a semiconductor element placed between electrodes, and ash heated to 450 to 550 C is delivered to the melt place by several flows until the preset space of the furnace is filled with fused ash, then ash is delivered at a rate providing the presence of the ash solid phase in the melt at casting in moulds up to 25 to 30 percent by mass. The semiconductor element consists of ash - 25 to 30 percent by mass, clay - 45 to 60 percent by mass, iron or graphite - 10 to 60 percent by mass. EFFECT: facilitated procedure. 1 tbl