Potash feldspar ore dressing equipment is a typical non-metallic ore beneficiation equipment. The general selection of potash feldspar equipment includes: jaw crusher, ball mill, classifier, magnetic separator, mixing tank, flotation machine, high gradient magnetic Equipment, etc. Henan Xingyang Mining Machinery Factory as a professional mineral processing equipment manufacturers more than 30 years, according to customer needs and actual conditions, can provide ore petrochemical inspection, beneficiation experiment, process design, complete equipment manufacturing, equipment installation and follow-up Equipment operations and other EPC work for the entire K-feldspar mineral processing project.
Feldspar is a silicate mineral of K, NA, Ca composed of silicon-oxygen Tetrahedra. Its main components are SiO2, Al2O3, K2O, Na2o, CaO, and MgO, which are important raw materials for manufacturing, and widely used in chemical, abrasive, glass fiber, electrode, Enamel and filler industries. The prevalence of top quality glass and ceramic products demands a growing supply of feldspar with high purity and low iron. Photo source: sandatlas.org
Whats the workflow of the feldspar stone processing plant? Generally speaking, the feldspar concentrate rich in potassium and sodium is recovered by the combined mineral separation methods of gravity separation, electric separation, magnetic separation and flotation to remove associated minerals such as quartz and mica.
The crushing and grinding of feldspar are not only to meet the grain size requirement of the final product, but also to meet the need of the impurity removal process. The coarse crushing of feldspar mostly adopts jaw crusher, and the particle size is about 10mm. There are many options for fine crushing and grinding machines of the feldspar processing plant, mainly roller crusher, impact crusher, sand making machine, hammer crusher, stone grinding, column mill, tower mill, Raymond mill, stirring mill, vibration mill, sanding mill, and airflow mill, etc. At present, feldspar grinding can be divided into dry grinding and wet grinding, wet type grinding is more efficient than dry type.
From the point of view of the application industry, the processing of feldspar raw materials in the glass industry mostly adopts a steel rod medium grinding machine, which has high grinding efficiency and uniform particle size, but the introduction of iron pollution leads to the low quality of feldspar products. The ceramic industry has higher requirements for feldspar raw materials, so stone roll grinding or ceramic ball grinding is often used, which has low grinding efficiency and high energy consumption, and can not realize high efficiency and continuous process.
On the basis of ensuring the high quality of feldspar products, how to realizing high efficiency grinding process and continuous production is an important subject in the research of feldspar beneficiation and purification.
The washing process is suitable for feldspar produced from weathered granite or feldspar placer, which mainly to remove impurities such as clay, fine mud and mica. On the one hand, it can reduce the content of Fe2O3 in feldspar ore, on the other hand, it can increase the content of potassium and sodium in feldspar ore. Common ore washing machines: Denver washer dryer, vibrating screen, log washer, mixing tank, and grinders.
Desliming is mainly used to remove the primary slime and the secondary slime produced by grinding, prevent a large amount of fine slime from affecting the separation effect of subsequent operations such as flotation and magnetic separation. Commonly used equipment desliming hopper, centrifuge concentrator, hydrocyclone, etc.
Due to the magnetic properties of iron minerals, mica and garnet in feldspar ore, it can be separated from feldspar mineral by the external magnetic field. In general, the magnetic properties of iron minerals and mica in feldspar are weak, only by using high-intensity magnetic separator can get a good result. The main magnetic separator equipment has a permanent magnetic roller type strong magnetic separator, permanent magnetic drum type medium strong magnetic separator, wet flat type strong magnetic separator and high gradient strong magnetic separator.
Flotation is an effective way to remove impurities in feldspar. On the one hand, the impurity elements such as iron and titanium can be removed from feldspar, the combination of chemical agents depends on the existing components of impurity; on the other hand, the feldspar can be separated out the quartz, thus increase the content of K, Na. At present, there are many studies on the separation of feldspar and quartz, as well as the selective separation of potassium feldspar and albite.
It is difficult to remove the iron-bearing minerals in ultrafine feldspar particles by traditional methods, but leaching can achieve better results. The feldspar leaching reagent is not only beneficial to the decomposition of feldspar, but also can effectively remove the interlayer iron minerals on the surface of feldspar. Biological leaching has the advantages of simple operation and low environmental pollution.
For some very difficult separating feldspar, of which iron content is high, some iron minerals are permeated in the feldspar cleavage, only single separation process does not meet the requirements of concentrate, the combination of multistage is introduced at the right moment.
(1) Magnetic-floating combined flow Most of the iron minerals were removed by magnetic separation, and then the fine iron minerals and iron-stained Potassium Feldspar were removed by flotation. Dry magnetic separation followed by flotation can get the best separation effect, but the dry magnetic separation need dehydration and drying process, the cost is higher, so wet magnetic separation followed by flotation process is more widely used. (2) Stripping-strong magnetic separation process combined flow If the feldspar ore is soft, easy crushing, put them into the grinding mill machine to peel off the iron material in the mica group minerals. The result shows that the stripping-strong magnetic separation process has a significant improvement, besides, its cost is lower than that of the magnetic flotation combined flow. JXSC focuses on help customers to solve mineral processing problems occurs in the feldspar mining plant, including provides mining machines, design mineral processing workflow, etc.
Small sodium potassium feldspar PTMS magnetic separator equipment is the characteristic of constant magnetic heavy industry products, small sodium potassium feldspar PTMS magnetic separator is a kind of from low grade potassium sodium potassium feldspar in albite machine, this machine is designed for choosing sodium potassium feldspar and design research and development, can promote the grade of low grade potassium sodium feldspar, sorting through the use of the machine, to sell sodium potassium feldspar grade standard can direct sales, it USES dry sodium potassium feldspar, sodium potassium feldspar multichannel choose pure operations, can be designed into a roller to four roller, the potassium sodium feldspar customers to use, to get around to choose potassium sodium feldspar customers.
Small potassium albinite PTMS magnetic separator equipment is the main equipment for high intensity magnetic separation of potassium albinite ore magnetic separation process, the equipment permanent magnet material as a magnetic source, open magnetic circuit design, so that manganese ore under the condition of high magnetic field strength, to achieve effective separation. Potassium sodium feldspar magnetic separation production line has the advantages of simple and easy operation, reasonable process, economic investment, high recovery rate, but the process is mainly for potassium sodium feldspar material of iron ore, therefore, it is not difficult to understand, magnetic separation is mainly used for sorting all kinds of iron ore or magnetic ore. PTMS magnetic separator is the use of ore and gangue magnetic difference between the separation of magnetic separation equipment, potassium sodium feldspar belongs to weak magnetic ore or co-generation ore, the need for processing equipment is high magnetic separator, this potassium sodium feldspar dry type PTMS magnetic separator has a high magnetic field intensity, large capacity, small power consumption, good sorting effect. Usually potassium sodium feldspar needs the processing process is crushing, magnetic separation, ball milling, magnetic separation (gravity separation), according to the customer's different requirements of equipment flow is also different.
PTMS production of small potassium sodium feldspar PTMS magnetic separator equipment, magnetic field intensity can reach more than 13500 gauss, the magnetic system is made of composite NdFeB, magnetic field is stable, the sorting effect of potassium sodium feldspar is good, the company to do beneficiation experiments, design reasonable beneficiation process.
A new permanent magnetic separator was introduced to treat the ores with the characteristics of weak magnetic iron minerals and in a fine size range. The new machine was applied to the iron removal from potash feldspar. The effects of the magnetic field intensity, pulp density and grinding fineness on the iron removal were investigated. The optimized operation parameters were achieved and listed as follows: the 0.074 mm content is 85%, the pulp density is 45% and the magnetic field strength is 2T. A close test of middles regrinding was also carried out to improve concentrate yield. The data show that the grade of TFe(total iron) in potash feldspar product decreased from 1.31% to 0.21% and the concentrate yield reached 85.32%. All the results indicated that the traditonal high-intensity electromagnetic separators can be betterly substituted by the new permanent magnetic separator. This study may provide the theoretical evidence for iron removal from potash feldspar.
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Funded by the National High-tech R&D Program of China(No.2007AA06Z123), the Hubei Provincial Key Laboratory of Pollutant Analysis and Recycling Project (KY 2010G 19) and the Independent Innovation Research Fund of Wuhan University of Technology (2010-YB-16)
Liu, Y., Peng, H. & Hu, M. Removing iron by magnetic separation from a potash feldspar ore. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 362366 (2013). https://doi.org/10.1007/s11595-013-0696-3