A kind of purification method of aphanitic graphite flotation concentrate

Abstract

The invention discloses a method for purifying aphanitic graphite flotation concentrate. The method includes steps of (1), removing reagents by means of ultra-fine grinding; (2), carrying out two-section heating rinsing and concentrating on the aphanitic graphite flotation concentrate; (3), soaking the aphanitic graphite flotation concentrate in acid at the constant temperatures of 90 DEG C for 1 hour; (4), removing impurities by means of reverse flotation. The method has the advantages that the aphanitic graphite flotation concentrate with the carbon (C) content of 85-90% is used as a raw material and is treated by the aid of processes for 'removing the reagents by means of ultra-fine grinding, carrying out the two-section heating rinsing and concentrating, soaking the aphanitic graphite flotation concentrate at the constant temperatures of 90 DEG C for 1 hour and removing the impurities by means of reverse flotation' for characteristics of small particle sizes of graphite crystals in the aphanitic graphite flotation concentrate, stable properties at the normal temperatures, good inherent flotability, the residual flotation reagents on the surfaces of minerals and the like, and accordingly high-purity graphite concentrate with the carbon (C) content higher than 99% can be obtained.

Description

technical field [0001] The invention belongs to the field of mineral processing of graphite ore, and in particular relates to a method for purifying aphanitic graphite flotation concentrate. Background technique [0002] High-purity graphite has the advantages of high strength, good thermal shock resistance, high temperature resistance, oxidation resistance, small resistivity, corrosion resistance, and easy precision machining. It is an ideal inorganic non-metallic material. At present, the raw materials for obtaining high-purity graphite at home and abroad are mainly large flake graphite ore. Graphite purification is to take effective means to remove impurities. The purification methods of large flake graphite ore include chemical purification and physical purification. Chemical purification includes: alkali acid method, hydrofluoric acid method, chlorination roasting method; physical method purification includes: High temperature method (also known as thermal method). Ho...

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Problems solved by technology

However, due to the characteristics of fine graphite crystals and high impurity content, the effect obtained by the above purification method is not ideal. Therefore, in actual production, it can only be used as a low-end battery filling material, and its true value cannot be reflected.