Barite ore processing plant Nigeria
Due to the brittleness of barite, we could crush the ores easily through simple crushing process. Therefore, we often use coarse jaw crusher to crush the raw materials in the crushing process. The process features easy operation, reliability, cost saving and high efficiency. We adopt round vibrating screen to screen the crushed materials. The simple-structured screen features easy operation and low maintenance cost, which is suitable for the screening of barite. After the crusher crushes big bulks of barite into small pieces, the screen will divide the materials into four grades, namely 30-50, 8-30, 0-8 and 50mm. Bulk materials larger than 50mm will be returned into the crusher for further crushing while 30-50mm sized materials will go to the hand picking process. We could pick out the coarse barite particles with a simple speed variable hand sorting belt machine.
Barite processing and grinding plant
After several crushing processes, we could get fine raw materials at micron level. After burned for 2.5 hours in the roaster, the raw materials will become clinkers. Then, we clean the alkaline materials off the clinkers in the water, add diluted acid into the chamber and pulp the mixture. Then, adding sulfuric acid and aluminum powder (acid solvent and bleach) into the reactor, stiring the mixture for 2.5 hours at boiling temperature. After the process, we get bleaching materials. After cleaning off the soluble mineral salts, we get the finished products through the filter pressing and drying(170℃) processes. Bleaching and ultrafine grinding are the most important steps of the process. In the bleaching step, we roast the materials to dispose of carbon and wash the materials in acid liquid (in order to get rid of colored element impurities). Therefore, it is crucial for us to strictly control the roasting time and temperature, acid concentration, bleaching time, the added amount and times of reducing agents. We use high-efficient grinder in the ultrafine grinding process with proper parameters.
Barite separation plant
We often adopt gravity concentration to separate barite. In the process, we obtain the fine barite through washing, crushing, screening, jigging or other gravity concentration processes. As the jig can handle a wide range of sizes, we could separate 0-30mm sized particles with the jig alone.
We could separate barite manually based on the differences between barite and associated minerals in terms of color and density. In accordance with the differences between barite and associated minerals in terms of color and density, we could get ores with over 88% grade with gravity concentration, a process that includes washing, desliming, screening, jigging and tabling. The process is mostly used in processing residual ore deposit. And based on the differences between barite and associated minerals in terms of physical and chemical properties on their surfaces, we could adopt flotation to separate barite. This process is mostly used in processing sedimentary ore deposit and hydrothermal barite associated with sulphide and fluorite. According to the differences between barite and iron oxide minerals in terms of magnetism, we could dispose of iron oxide mineral impurities through magnetic separation.
Barite washing plant
We need to get rid of mud with hydro cyclone before the concentration of barite in order to get a better result. If the barites need to be crushed loosely with relatively weak scrubbing power, we could adopt the cylinder wash screen to wash the ores. The screening cylinder consists of steel plate with punching holes and woven mesh. Inside the cylinder, there is a high pressure water pipe. Driven by the screening cylinder, the barites will be crushed loosely as they roll and crush each other. Fine particles and slurry smaller than the mesh holes are discharged into the splicing funnel while the coarse particles will be discharged through the end of the cylinder.
The spiral grader, particularly the low weir spiral grader (the overflow weir below the lower bearing has strong stirring force) could be used as ore washer. The machine could process products mixed with slime discharged from other ore washer and sort out the slime. However, as the machine is weak in loose crushing, it is not efficient when processing minerals with much slime.
Barite concentration plant
The dehydrating and drying are the subsequent processing of various ore powder materials. The process aims at adjust the water proportion of the product to ensure that the product meets the industrial demand, simplify storage and transportation, and recover the water that have been used in the separation process. As the jig belongs to wet separator, the fine ores and tailings often contain a large proportion of water. Therefore, we need to dehydrate the materials for two purposes. One is to reduce the water in the fine ores, and the other is to dispose the extra water in the ores and return them into the recycling pool to minimize water consumption of the recycling water system. In the production process, we usually adopt the centrifugal dehydrator. Compared with other dehydrators, the centrifugal dehydrator features fewer investment, higher productivity, better dehydration performance, lower power consumption and smaller space.
Barite is the most commonly found ore in the barium category, which is often used in the production of barium compounds, the ingredient of which is barium sulphate. Barite is a very important non-metallic mineral raw material. And it can be found in many industries, such as the weighting agent for drilling mud, the pigments of lithopone, barite in the packing industry, and the mineralizer in the cement industry.
Barite deposits can be divided into the layered type deposit, vein type deposit, transformed vein type deposit and accumulation type deposits. Barite mining includes open-pit mining and underground mining with the former being the most popular method. In open-pit mining, we usually quarry barites at residual talus deposits and outcrops and shallow depth ore deposits. In underground mining, we usually quarry barites through the shrinkage method, filling method and stage caving method. The mining equipment used in underground mining consists of ore trucks, inclined shaft hoist, local exhaust ventilation fan and underground support. Machines used in open-pit mining include loaders and dump trucks.
After the barites are fine crushed, 30-50mm sized particles will be sent to the manual separation process, 8-30mm sized particles will go to the jig for jigging, and 0-8mm sized particles will be sent to the ladder jig for screening. Following the screening process, the fine ores and tailings will be dehydrated. Then, the water recovered will be recycled, the tailing will be transferred to the tailing storage, and the fine ores will be stored separately based on their grade.
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