Beneficiation process for quality improvement and iron removal of feldspar ores

Abstract

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.

Description

technical field [0001] The invention relates to a process for iron removal and separation of feldspar, in particular to a process for iron removal and separation of feldspar with high iron content, which is suitable for iron removal and separation of feldspar, especially for low potassium and sodium content and high iron content , Severely weathered feldspar mines are separated by iron removal to produce low-iron and high-quality feldspar concentrates. Background technique [0002] At present, magnetic separation or flotation is generally used in the separation methods for feldspar iron removal at home and abroad. The main process of magnetic separation is to dry-grind the raw ore and use strong magnetic separation for the 1-0.05mm particle size after classification. Machine, magnetic separation under the condition of magnetic field strength ≥ 1.5T, can make Fe 2 o 3 The content dropped from 0.8% to about 0.2%. However, in actual production, due to low operating effic...

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Problems solved by technology

Although this process can also remove Fe in feldspar 2 o 3 The content is reduced to less than 0.2%, but it mainly has the following disadvantages: (1) The amount of collector used in flotation is large, the amount is 2-5 kg / ton, and the cost of flotation agents is high; (2) The auxiliary agent used is Fuel oil is a flammable chemical dangerous product, which is not convenient for storage and transportation; (3) In this process, due to the large amount of collector used, and the color of the collector itself, the feldspar concentrate is polluted, affecting the feldspar The whiteness of concentrate; (4) The concentration of flotation operation is 30% to 35% commonly used; (5) In this process, strong magnetic separation is used, and the investment of the strong magnetic machine used is large, and the concentrate is separated by strong magnetic separation Low concentration (<10%), requiring large-area concentration equipment

But so far, there is no precedent for flotation of feldspar ore with a high pulp concentration of about 50%. method of mine

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