1·The technological processes of raw ore direct acid-leaching, raw ore salt roasting-water leching or acid leaching and raw ore salt roasting-acid pelletizing curing-acid leaching, etc.
原矿加盐焙烧水浸或酸浸；原矿加盐焙烧一拌酸制粒熟化酸浸等工艺过程。