Mineral processing and deep purification method for quartz sand

The invention discloses a mineral processing and deep purification method for quartz sand. The method comprises the following steps of (a) during the scrubbing of the quartz sand in an acid-digestion scrubbing machine, adding a sulfuric acid solution with the weight concentration of 15-60% for acid digestion, wherein the weight ratio of the quartz sand to the sulfuric acid solution is 25-65%, the temperature for acid digestion is 50-135 DEG C, the time for acid digestion is 20-90 minutes, and sulfuric acid can quickly react with iron-bearing minerals in the quartz sand through the organic combination of the mechanical scrubbing and acid digestion of the quartz sand; and (b) after acid digestion, separating the quartz sand from filtrate through filtrating, wherein the filtrate can be recycled, and products with Fe2O3 content meeting requirements are obtained after the quartz sand is cleaned. The method has the beneficial effects that aims which can not be achieved by the conventional mineral processing methods