(1) first and then floating the floating mica containing iron minerals feldspar last floating. First adjust the pH of the slurry to 3 to 4 with sulfuric acid, float the mica with an amine collector , then adjust the pH of the slurry to 4 to 5 with hydrochloric acid, float the iron-containing mineral with sulfonated petroleum as a collector, and finally use fluorine. The hydrogen acid is adjusted to a pH of 2 to 3, and an amine is used as a collector to float the feldspar. Quartz is produced in the form of tailings.
(2) In the order of floating iron minerals, mica, and feldspar. The order of collectors used is sulfonated petroleum-amine-amine.
(3) The floating feldspar is first floated with iron minerals, and the tailings are quartz concentrates. It is suitable for quartz sand with low mica content.
(4) Only iron minerals are floated, and the tailings obtained are quartz concentrates. Use tall oil as a collector and adjust the pH to 8-9 with sodium carbonate. After flotation of iron-containing minerals, the tailings are quartz. In the case where there is no mica and feldspar in the ore, or if the ore contains less feldspar and there is no need to separate it, it is advantageous to use this simple process.
(5) When the quartz sand contains more feldspar, adjust the pH of the slurry to 7-8 with fatty acid as the collector, float the iron-containing mineral, add hydrofluoric acid and amine flotation feldspar, and finally in the slurry. When the pH is 7-8, the amine is used as a collector to float quartz.
(6) Adjust the pH of the slurry to 7-8, use the sulfonated petroleum to carry out the flotation of the iron mineral, and then float the quartz with the amine when the pulp pH is 7-8. This scheme is suitable for the case where there is no feldspar in the raw material, or the content is small and there is no need to separate it.
(7) Amine is used as a collector, mixed with flotation quartz and feldspar, mixed with concentrate and hydrofluoric acid and amine flotation feldspar, and tailings are quartz concentrate (Figure VII).
(8) After the floating iron mineral is mixed with feldspar and quartz, it is suitable for quartz sand with high iron content.
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