Pre-treatment technology of high-iron stone coal slaking leach liquor

The invention discloses a pre-treatment technology of high-iron stone coal slaking leach liquor. Due to the fact that a concentrated acid curing method has a plurality of remarkable advantages on the aspect of extraction of stone coal ores which are difficult to process, however, when the slaking leach liquor is subjected to pretreatment before extraction, certain technical problems still exist in the high-iron leach liquor which contains much ferric iron, when iron powder is used for reducing the ferric iron, the pH is prone to being excessively high, and the sediment loss of certain vanadium is caused easily, and meanwhile it is difficult to treat iron slag; to solve the problems, the pre-treatment technology includes the following steps that firstly, the pH value of a solution is adjusted with alkali; then iron powder is added for reduction, then phosphate is added for deep purification, finally, an obtained solution is subjected to liquid-solid separation, and liquid obtained after pretreatment and treate