Beneficiation process for quality improvement and iron removal of feldspar ores

The invention discloses a beneficiation process for quality improvement and iron removal of feldspar ores. By adopting the technical scheme, the beneficiation process comprises the steps of first adopting a low-intensity magnetic separation process to perform the iron removal so as to obtain rough feldspar concentrates, wherein the low-intensity magnetic separation intensity is 120-200KA/M; performing reverse flotation on the rough feldspar concentrates at the 46%-52% pulp density to achieve further quality improvement and the iron removal, wherein the reverse flotation step includes one-time rough flotation and fine flotation for one-three times, a reverse flotation collecting agent is sulfonated grease, modified fatty acid, high-carbon mixed alcohol or a mixture of the sulfonated grease, the modified fatty acid and the high-carbon mixed alcohol, the using amount of a rough flotation collecting agent is 600-1000g/t, and the using amount of the fine flotation collecting agent is 1/4-1/8 of the using amount of the rough flotation collecting agent. The beneficiation process for the quality improvement and the iron removal of the feldspar ores has the advantages that the process is simple, the feldspar concentrate production rate is high, the Fe2O3 content in the concentrates is low, and the operation efficiency is high, and is especially suitable for the iron removal of the feldspar ores which are low in potassium-sodium content and high in iron removal and weathered severely, and a high-quality feldspar concentrate product with lower than 0.15% of Fe2O3 content can be produced.