CALCINATION OF PHOSPHATE IN IMPINGING STREAMS .2. PHOSPHATES WITH HIGH ORGANIC-MATTER AND WITH PULVERIZED COAL

Calcination of a high organic matter phosphate and a phosphate contain ing pulverized coal up to 10 wt % was performed successfully in an imp inging stream calciner. The results re-established previous conclusion s that the present calciner is a useful device. A simplified model has been developed for exploring the effect of various operating paramete rs on the concentration of phosphate particles at the impingement plan e of the streams. It also assisted us in explaining the effect of the phosphate flow rate on the efficiency of calcination. It was establish ed that the calcination rate of phosphate is governed by the internal resistance of the particle to the heat transfer, which was consistent with previous results.