Analyze the process and main use of the feldspar beneficiation method

The feldspar is also known as potassium feldspar. The crystal is plate-shaped or short-column. In the rock, it is often incomplete columnar particles. Meat red, light yellow, light yellow-white, glass or pearl luster, translucent. Hardness 6, there are two groups. The cleavage is straight (the name is the name of the feldspar), and the proportion is 2.56--2.58.

Process analysis of feldspar beneficiation method

The method of mineral processing of feldspar varies according to the type of deposit. With the increasing reduction of rich ore, most of the feldspar deposits in foreign countries have to undergo qualified processing to obtain qualified products, and they are developing in the direction of diversified management and comprehensive utilization of resources. As mentioned earlier, feldspar is either recycled as a by-product of the deposit, or is used to make full use of other minerals while mining feldspar.

Pegmatite feldspar beneficiation

Generally, the feldspar grade of the pegmatite-type feldspar deposit is high and the mineral composition is relatively simple. Its dressing, in addition to hand-selected, generally after crushing, grinding successive crushing operations, then go to high intensity magnetic separation of iron oxide and other impurities. Strong magnetic selection is dry and wet, depending on the conditions and mineral characteristics. The magnetic field strength required for the two magnetic separation methods is generally 1200 A/m or more. Below this value, the sorting effect is not good. At present, the removal of iron impurities in this type of feldspar mineral is the main means of strong magnetic separation.

Electrostatic sorting can also achieve the purpose of sorting and removing iron, but it is rarely used because of its high power consumption and high cost. Baigangyan feldspar beneficiation This feldspar mineral has uniform mineralization and stable quality. Mineral composition: Potassium feldspar and albite account for about 50-60%, and gangue minerals are mainly quartz , mica and iron-bearing minerals. Such deposits are generally subjected to flotation to obtain feldspar concentrates. The general flotation process is: the raw ore is crushed to about 20mm by coarse crushing and medium crushing, and after mixing, wet grinding to -20 mesh in a closed loop operation consisting of a rod mill and a trommel, and then using a cyclone and The spiral classifier removes - 200 mesh grade fine-grained clay impurities. Feed -20+200 mesh grade materials to the flotation operation.

Flotation is divided into three phases: the first phase: mica is obtained by flotation with a cationic collector in an acidic medium. The flotation machine uses an acid-resistant wooden inflatable flotation machine to control the liquid level. The mica was purified by flotation and wet sieved with a sieve of 80 mesh. More than 80 mesh wet mica is sold to the mica processing plant. The second stage: the anion flotation agent in the acidic medium removes the iron-containing minerals, mainly garnet , and also uses a flotation machine. The third stage: feldspar is floated from the quartz with an anionic flotation agent in a hydrogen argon acid medium.

The feldspar product is dehydrated by a filter, dried by a rotary dryer, and then sold as a finished product. Most of the feldspar products are sold to glass factories, and a small number of feldspar products are further processed and sold to ceramic factories. The above flotation process is often modified based on changes in the nature of the ore. If the mica content in the grinding product is extremely small, it can pass the first stage flotation and directly enter the second stage iron removal flotation. If the grinding product after the first stage and the second stage flotation operation, the iron content and the quartz content can meet the requirements of some glass factories, the third stage feldspar and the flotation separation used can be omitted, so that the product is long. The formation of the stone silica sand mixture is used directly as a glass batch. The main purpose

The syenite is an important rock-forming mineral of granite rocks and some metamorphic rocks, and is easily weathered into kaolin . The feldspar is an important raw material for the ceramics and glass industry.

The plagioclase-like series of plagioclase is a mixture of isomorphs composed of albite and anorthite. According to the ratio of the two components, the feldspar can be roughly divided into: acidic plagioclase- - Calcium feldspar component content 0 - 30% neutral plagioclase - calcium feldspar component content of 30% - 70% basic plagioclase - calcium feldspar component content of 70% - - 100% fine columnar or plate crystal, fine and parallel double crystal grains can be seen on the crystal face or cleavage surface; in the rock, it is mostly plate-like, fine columnar particles. White to gray, or light blue, light green, shiny glass, translucent. Hardness 6 - 6.5, two groups of cleavage oblique (about 86 degrees, plagioclase hence the name) specific gravity 2.60 - 2.76. Albite in plagioclase is the raw material of ceramics and glass industry.

The feldspar, plagioclase and various varieties thereof are collectively referred to as feldspar minerals. In addition to being a raw material for the glass industry (about 50-60% of the total amount), feldspar minerals account for 30% of the ceramic industry, and the rest are used in other industries such as chemicals, abrasives, glass fibers, and welding electrodes.

(1) Glass flux: Feldspar is one of the main components of glass mixtures. High feldspar containing Al2O3, low iron content, and the fusible than aluminum oxide, not only a low melting temperature and broad melting range, is mainly used to increase the alumina content in the glass batch to reduce the temperature of the molten glass production and increasing alkali content To reduce the amount of alkali. In addition, the process of turning the feldspar into glass after being melted is relatively slow, and the crystallization ability is small, and it is possible to prevent crystals from being precipitated during the formation of the glass to damage the product. Feldspar can also be used to adjust the viscosity of the glass. Potassium feldspar or albite is generally used for various glass mixtures.

(2) Ceramic green body batching: Before the firing, the feldspar can act as a raw material, reduce the drying shrinkage and deformation of the green body, improve the drying performance and shorten the drying time. At the time of firing, it can be used as a flux to lower the firing temperature, promote the melting of quartz and kaolin, and diffuse and permeate in the liquid phase to accelerate the formation of mullite. The feldspar glass body formed in the molten state is filled between the mullite crystal grains of the green body to make the green body dense and reduce voids, thereby improving mechanical strength and dielectric properties. In addition, the formation of feldspar glass can also improve the light transmittance of the green body. The amount of feldspar incorporated in the ceramic body varies with the raw materials and product requirements.

(3) Ceramic glaze: Ceramic glaze is mainly composed of feldspar, quartz and clay raw materials, and the feldspar content can reach 10-35%. In the ceramic industry (blanks and glazes) potassium feldspar is mainly used.

(4) Enamel raw materials: mainly mixed with feldspar and other mineral raw materials. The amount of feldspar is usually 20-30%.

(5) Abrasive: In the production of grinding wheel, feldspar is commonly used as a ceramic cement component, and its content is 28-45%.

(6) Others: Potassium feldspar can be used as a raw material for extracting potassium fertilizer.

It is applied to cotton yarn, woolen yarn, acrylic yarn and other blended yarns.