Method of separating feldspar and quartz from granite materials

Abstract

The invention relates to a method of separating feldspar and quartz from granite materials, and belongs to the technical field of separation and mineral beneficiation. The method comprises the steps of an ore breakage working procedure, an ore grinding working procedure, a screening working procedure, a photoelectric color sorting working procedure, a powder milling working procedure and a magnetic separation working procedure. The feldspar, the quartz and magnetic materials in granite are thoroughly separated by use of the physical technology, no any waste gas or waste water or other substances which pollute the environment are generated in the process of operation, and the damage caused by the floatation technology in the prior art to the environment is effectively avoided. In addition,the feldspar which is separated and purified by use of the method and the quartz which is separated and purified by use of the method can be applied to the ceramic industry instead of natural feldsparand natural quartz, the source of raw materials in the method is sufficient, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of separation and beneficiation, and in particular relates to a method for separating feldspar and quartz from granite rock. Background technique [0002] Potassium albite feldspar, due to its low melting point between 1100-1300°C, has good chemical stability, and has a melting effect when co-melted with quartz and silicate, and reacts to form low-melting glass substances, which can reduce the firing temperature of ceramic products , to promote the sintering of ceramic products. Before sintering, feldspar acts as a barren raw material in the blank, improving the hydrophobicity of the blank, shortening the drying time of the blank, and reducing the drying shrinkage and deformation of the blank. In the ceramic glaze, after the feldspar glass melt is cooled after melting, the glass substance of the glaze is formed, which increases the transparency of the glaze and improves the gloss and performance of the glaze...

AI Technical Summary

Problems solved by technology

[0003] Different types of granite are mainly feldspar and quartz mineral rocks. Thousands of granite stone processing enterprises in China will produce a large amount of waste and mined blocks during the mining and processing process. The tailings and blocks are Existence, causing serious pollution to the environment, although the chemical composition of these granite wastes is mainly potassium, albite, quartz, black mica, but due to the K in the granite waste 2 O, Na 2 O grade is low, and the harmful component Fe 2 o 3 、TiO 2 Therefore, it cannot be directly used in ceramic glazes and blanks instead of feldspar, and a small amount of granite ore with good quality can only be added to low-end ceramic blanks, making a large amount of granite waste unreasonable. processing, resulting in a waste of resources

At present, the existing domestic granite separation feldspar and quartz purification technology is mainly flotation process, but there are a large number of harmful chemicals and harmful substances in the flotation process, causing great harm to the environment, and from the separation results From the point of view, the grades of K and Na have been improved by 1-2 percentage points, and the effect of separation and purification cannot be achieved at all. Therefore, there is an urgent need for a method that can improve the grades of K and Na and is environmentally friendly. Feldspar and Quartz Method

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