LIME REFRACTORIES WITH LIMESTONE AND SYNTHETIC CALCIUM HYDROXIDE ADDITIONS

The effects of fine, natural limestone and synthetic calcium hydroxide additions on the sintering and microstructure of two natural, dead-bu rned limes were investigated. Density increases were achieved and micr ostructural changes were observed. The high reactivities of the decomp osition products of the carbonates and hydroxides enhanced the sinteri ng processes to yield refractory bodies with densities in excess of 90 % of theoretical. Microstructurally, the additions promoted grain grow th and simultaneously modified the porosity of these high-density refr actory bodies.