Date: Apr. 15, 2021
To solve the problem of roughing the raw ore mined from the mine and discarding a large number of tailings in the mine, the kaolin sand washing production line designed by LZZG not only solves the problems of goaf filling, storage, and transportation of raw ore in the beneficiation plant, but also realizes With the functions of material classification, washing, tailwater purification, solid waste dry discharge, etc., the materials can be effectively classified, sieved, cleaned and dewatered, and can also save resources and reduce water consumption.
Kaolin is a non-metallic mineral, a kind of clay and clay rock dominated by kaolinite clay minerals. Kaolin has a wide range of uses. It is mainly used in papermaking, ceramics, and refractory materials, followed by coatings, rubber fillers, enamel glazes, and white cement raw materials, and a small amount is used in plastics, grinding wheels, soaps, pesticides, medicine, chemicals, building materials, national defense, etc. Industrial sector. For soft kaolin and sandy kaolin, the wet beneficiation process is generally used.
Slurrying: Add water and dispersant to the raw ore according to the set concentration requirements, and then slurp it in a mixer or a masher. The purpose of pulping is to disperse kaolin and separate it from sandy minerals and plant impurities to prepare a slurry of suitable concentration for the next process.
In addition to coarse sand: the impurity particles such as quartz, feldspar, and mica in the kaolin ore are coarser, generally larger than 325 mesh, while the kaolin has a finer particle size, mainly concentrated in -2μm. The spiral classifier can remove most of the quartz and feldspar grit.
Sand washing and fine sand recovery: The sand washing and recovery integrated machine washes the coarse sand, and removes the kaolin fine sand (fine quartz, feldspar, and other impurities) through the hydrocyclone sorting operation of the integrated machine. Generally, different diameters are used The hydrocyclone performs multiple sorting.
Dewatering screening: The dewatering screen dewaters, classifies, de-intermediates, and de-slims the materials. The grading screen classifies materials.
Magnetic separation: To obtain high-quality or high-quality kaolin, strong magnetic separation or high gradient magnetic separation, chemical bleaching, and even flotation and selective flocculation are required. The dyeing mineral impurities in kaolin, such as limonite, hematite, siderite, pyrite, anatase, rutile, etc., all have weak magnetic properties, so the kaolin after sand removal can be further used with a strong magnetic separator or a high gradient The magnetic separator performs magnetic separation.
Filtration and concentration: The suspended solids in the slurry treated by the separator are discharged into the sewage tank, and then the tailwater is pumped from the sewage tank into the thickening tank for the mud-water separation operation. The concentrated mud is pumped into the plate and the frame filter press through the bottom of the filter tank to achieve a dry pile. Ensure that the product moisture is below 32-35%, save energy and improve the working environment. After pressure filtration, the clean water enters the clean water pool to realize the recycling of clean water.
1. The entire production line can be customized and process design according to customer needs.
2. LZZG kaolin sand washing production line has a high degree of automation, low operating cost, large output, low pollution, and easy maintenance. The finished materials were produced to meet the national construction sand standard, with uniform particle size, good grain shape, and reasonable gradation.
3. The entire kaolin sand washing production line can realize material washing, magnetic separation and screening, tailwater purification, solid waste dry discharge, and tailwater can achieve zero discharge.
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