Characteristics:
Feldspar is a kind of alkali metal or alkaline earth metal, such as potassium, sodium, calcium, and barium aluminum silicate minerals. The main component is silicon dioxide, aluminum oxide, potassium hydroxide, sodium oxide, calcium oxide. The Mohs hardness is 6.0-6.5 and relative density is 2.55-2.75g/cm3. Pure feldspar in nature rarely exists.
Use of finished product:
As the industrial raw materials, feldspar mostly is used in the ceramic industry, accounting for 30%. The rest for other sectors of chemicals, abrasives, glass fiber, welding, etc.; mill, feldspar powder reaches the job fine degree range, use is also different.
1, the glass flux
Feldspar is one of the main ingredients in the glass mixture. Feldspar contains aluminum oxide. Iron content is low, not only reducing the melting temperature but also increasing the alkali content in order to reduce the amount of alkali. In addition, feldspar melted into glass process is relatively slow crystallization ability. It can prevent the precipitation of crystals in the process of glass formation and destruction of products. Feldspar can also be used to adjust the viscosity of the glass.
2. The ceramic body ingredients
Before the firing, feldspar plays the role of barren raw materials, reducing the drying shrinkage and deformation of the green body to improve the drying performance. As a flux to reduce the firing temperature, it prompts quartz and kaolin melting and the diffusion of the liquid phase penetration and accelerates the formation of mullite. In addition, the formation of the feldspar glass can improve the light transmittance of the green body.
3, the ceramic glaze
The ceramic glaze is mainly composed of feldspar, quartz and clay materials. The proportion of feldspar can be up to 10-35%.
4. Enamel raw materials
Feldspar and other raw materials dope dubbed the enamel. The incorporation of the feldspar is usually 20-30%.
Prospects for development:
Long stone has a high melting point, high melt viscosity, and melt under high temperature to fulfill the formation of glassy material characteristics of transparency. Alkali feldspar glass melting temperature can be reduced to save soda ash. It is the production of various ceramic the main raw material of enamel, electrical porcelain blank and glaze. In recent years, with the development of colored glass bulbs and high pressure electrical porcelain industry, and ceramics for daily use growing gentrification, high purity and low iron alkali feldspar, increasing demand for limited resources. High quality alkali feldspar was in short supply trend. Most of the ore will be required in addition to iron in order to meet the quality requirements of the industrial production. Beneficiation of feldspar in addition to iron technology is being enterprises attach great importance.
Configuration program:
1, the pegmatite output quality alkali feldspar
Hand-picked - broken - grading - finished product, the process used in the wheel mill grinding efficiency and low processing capacity, fewer and fewer high-quality feldspar price, because the process is not iron removal process products cannot meet the ceramics, colored glass bulb factory requirements, backward production technology, low quality, and economic decline.
2, decomposed granite, alkali feldspar
Broken - grinding - grading - flotation (in addition to iron, mica, quartz) - pressure filtration - drying - finished product, this process the production of alkali feldspar ceramics and colored glass bulb plant product quality to meet the requirements, but because dressing the high cost of pollution to the environment, do not recommend using this technology.
3, alkali feldspar in the aplite
Broken - grinding - screening - magnetic separation - pressure filtration - drying - finished this process using wet production to achieve the quality requirements of high-grade ceramics and colored glass bulb, complex process, need to pressure filtration, drying equipment, production The cost is too high, not recommended.
4, the optimal process
Hammer crusher - Pendulum grinding - magnetic separation - finished product, the dry production process, the choice of tilting the milling machine to make the process simplification, cost of production is much lower, Pendulum Grinder mixed mechanical iron subsequent magnetic separation to remove; This process into small, high efficiency, low energy consumption, operating time, production, created the greatest direct benefits for customers.
Specific process configuration should be based on the specific analysis of the actual situation of the customer site. Welcome to visit and experience Kefid's star service!
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