Potash feldspar selecting method

Abstract

The invention discloses a potash feldspar selecting method, and relates to the technical field of potash feldspar processing. The method includes the steps of cleaning raw ore and conducting screen, breaking, ore grinding, floatation and dewatering. Floatation includes primary floatation and secondary floatation. In the primary floatation, ore sand is adjusted into 25-35% ore slurry, the pH is adjusted to be 3-5, 8-11% sesbania extracts are added to be stirred, 4-9% of coconut extracts are added to be stirred until foam is formed, and the foam is scraped away. In the secondary floatation, oresand is adjusted into 35-45% ore slurry, the pH is adjusted to be 1-2, 3-5% reagents are added to be stirred until foam is formed, the foam is scraped away, and dewatering is conducted. The reagents comprise flos sophorae extracts, eucalyptus leaf extracts, tea leaf extracts and N-dodecyl diquaternary ammonium salt. By means of the method, iron impurities and biotite in feldspar are effectively removed, high-whiteness potash feldspar powder can be produced, the applied floatation reagents are friendly to the environment and free of toxin and pollution, and the whiteness of the obtained potashfeldspar powder reaches 61% or above and is better than that in a traditional method.

Description

【Technical field】 [0001] The invention relates to the technical field of potassium feldspar processing, in particular to a method for selecting potassium feldspar. 【Background technique】 [0002] Potassium feldspar is a kind of feldspar, which is a common feldspar mineral and is a potassium aluminum silicate. Potassium feldspar is generally a glassy crystal, and it is one of the main raw materials for making glass and ceramics. In recent years, with the rapid development of my country's ceramic industry and glass industry, the demand for high-purity potassium feldspar continues to increase. Iron minerals, titanium oxides, mica, and quartz are the main impurities in potassium feldspar. Mica is mainly biotite, iron lepidolite, and green mica, which affect the whiteness, dielectric properties, and chemical stability of ceramics. [0003] At present, the iron removal methods of feldspar are mainly magnetic separation, acid leaching and flotation, but magnetic separation has hi...

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Problems solved by technology

[0003] At present, the iron removal methods of feldspar are mainly magnetic separation, acid leaching and flotation, but magnetic separation has high requirements on equipment, and the discharge from acid leaching and flotation is highly toxic and pollutes the environment seriously. New Process Research", Tang Kai et al., "Contemporary Chemical Industry", 2008, 37(5): 456-458, the research suggests that soaking in sulfuric acid at 90°C can remove most of the iron impurities, and at the same time, potassium oleate, twelve Potassium alkylbenzene sulfonate, AES and AOS are used as flotation reagents for continuous treatment, which can remove iron, but a large amount of acid liquid and flotation reagents will harm the environment

[0004] The content of mica in mineral rocks is low, but it has a great influence on the whiteness and quality of feldspar ore, and mica is a silicate mineral with layered structure, acid and alkali resistance, stable chemical properties, and difficult to be removed

At present, mica removal methods are mainly as follows: under certain conditions, mineral dressing agents are used to capture mica and separate it from feldspar. Commonly used floating agents are chemical agents such as surfactants and ionic collectors. Most of the agents are Toxic substance, large amount of use and discharge will pollute the environment

For example, Chinese patent 201710843849.9 discloses a production and preparation method of potassium feldspar powder. Impurities are removed through a series of physical methods such as raw ore cleaning, screening, crushing, grinding, magnetic separation and dehydration to obtain potassium with less iron and high whiteness. Feldspar, but failed to remove mica, and the purity is not high; such as the literature "Research on the Whitening of Mica in Feldspar Mine", Pan Dawei et al., "Chinese Ceramics", 2015 (1): 54-57, the research believes that the mass ratio is adopted The mixture of dodecylamine and octadecylamine of 2:1 is used as a flotation agent to remove mica in feldspar ore, but dodecylamine is a toxic agent, and a large amount of use and discharge will pollute the environment. Therefore, the application is based on The above-mentioned published documents improve the preparation and impurity removal methods of potassium feldspar

In addition, the content of biotite in potassium feldspar in Hezhou area of ​​Guangxi is very high, which seriously affects the whiteness of feldspar, and there is no special method for removing biotite in the prior art. This application aims to find out the characteristics of potassium feldspar mica in Hezhou area. An environmentally friendly and powerful biotite removal method to improve the quality of potassium feldspar products in this area

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