Purifying technology of potassium feldspar sand powder

Abstract

The invention discloses a purifying technology of potassium feldspar sand powder, and belongs to the field of deep processing of potassium feldspar. The purifying technology comprises the following steps: (S1) adding potassium feldspar sand powder into water, and uniformly mixing to obtain slurry; sequentially adding the following agents into the slurry for purification: adding water glass and stirring for 10-20min while keeping the temperature at 70-90 DEG C; adding nitrilotriacetic acid and stirring for 5-10min while keeping the temperature at 60-80 DEG C; adding sodium benzoate and carboxymethylcellulose sodium and stirring for 5-10min while keeping the temperature at 60-80 DEG C; adding octylamine and sodium dodecyl benzene sulfonate and stirring for 10-30min while keeping the temperature at 50-60 DEG C; (S2) filtering, fetching the filter residue, and washing the filter residue with water, wherein the mass ratio of the filter residue to the water is 1 to (3 to 5); filtering and drying to obtain the purified potassium feldspar sand powder. The purifying technology disclosed by the invention can effectively reduce the iron content of the potassium feldspar sand powder while removing other impurities so as to enhance the whiteness and improve the quality of the potassium feldspar sand powder.

Description

technical field [0001] The invention belongs to the technical field of deep processing of potassium feldspar, and in particular relates to a purification process of potassium feldspar sand powder. Background technique [0002] Potassium feldspar is a potassium-containing framework silicate, which has the characteristics of low melting point, long melting interval, high melt viscosity, etc. It is widely used in ceramic blanks, ceramic glazes, glass, electric porcelain, abrasive materials, etc.; Stone raw materials have accounted for more than 50% of the entire raw material formula of ceramic products such as ceramic glazes, polished tiles, and sanitary porcelain, and their quality directly affects the quality grades of ceramic and glass products. In recent years, with the rapid development of new architectural glass, architectural ceramics and daily-use ceramics industry and the urgent requirements of environmental protection, the grade and iron content of potassium feldspar ...

AI Technical Summary

Problems solved by technology

Magnetic separation has a better effect of removing iron, and the iron content can be reduced to a lower level, but other impurities such as manganese, calcium, magnesium, etc. are difficult to remove, and the effect of whitening cannot be achieved; flotation has a better effect of removing impurities, The iron content can be reduced to less than 0.2%, but there are still other impurities that cannot be removed, and the whiteness needs to be improved

There are also pickling methods to purify potassium feldspar. Generally, sulfuric acid pickling is used. This method has a good impurity removal effect and a certain whitening effect, but the iron content must be reduced to below 0.24%. High concentration of sulfuric acid is required to increase the whiteness to above 80, and the general concentration should reach above 40%. Not only the utilization rate of sulfuric acid is low, but also a large amount of waste acid will be produced, resulting in high cost of impurity removal and great impact on the environment

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