Low-cost deironing quality-improving beneficiation method for high-impurity-content feldspar quarry

Abstract

The invention discloses a low-cost deironing quality-improving beneficiation method for high-impurity-content feldspar quarry. Inferior fine magnetite concentrates of low-intensity magnetic separation operation are divided into four fractions through grading operation of three times, and the concentrates of the coarse fraction of grading operation of the first time are directly thrown out as tailings (3). Rough flotation, fine flotation and the high-intensity magnetic separation process are adopted on the concentrates of the rough fraction of grading operation of the second time. The concentrates of the fine fraction of grading operation of the second time are graded through grading of the third time, and rough flotation, fine flotation and the high-intensity magnetic separation process are adopted on the concentrates of the rough fraction of grading operation of the third time. High-intensity magnetic separation operation is directly carried out on the concentrates of the fine fraction of grading operation of the third time to obtain concentrates (3). The grading treatment process is adopted, and products of different qualities and purposes can be obtained according to different purposes. The particle size of products of all fractions after grading is concentrated, few flotation reagents are adopted, and the flotation cost is low. The productivity and ferric oxide recycling rate of grading flotation are high, and all flotation indexes are good. The deironing beneficiation process for feldspar is good in applicability, and can be used for grading various types of feldspar quarry.

Description

technical field [0001] The invention belongs to the technical field of non-metallic ore beneficiation, and in particular relates to a method for removing iron and beneficiating feldspar ore, and can also be used for removing iron and beneficiating, improving quality and reducing impurities of other non-metallic ores. Background technique [0002] At present, the beneficiation method used for feldspar iron removal at home and abroad is mainly magnetic separation, and its main process is to dry-grind and classify the raw ore and classify the 1-0.05 mm particle size samples using a strong magnetic separator at a magnetic field strength of 1. Magnetic separation at 5T can make Fe 2 o 3 Content dropped from 0.8% to below 0.2%. However, in actual production, due to the low efficiency of operation and classification, Fe in the obtained feldspar products 2 o 3 The content is generally between 0.2% and 0.3%, which affects the quality and application range of feldspar products. E...

AI Technical Summary

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 has the following disadvantages: (1) The amount of collector is too large, about 2-5 kg / ton, and the cost of the agent is too high; (2) The additive used is fuel oil, which is flammable Dangerous chemicals, inconvenient for storage and transportation; (3) The collector itself has color, which can easily pollute the feldspar concentrate and affect the whiteness of the concentrate

However, the "single reverse flotation iron removal process" also has the problems of large dosage of chemicals and high content of impurity iron in the concentrate, and the concentrate yield is low and the product has a single purpose

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