Union World is an integrated service company with leading professional flocculent, sewage treatment related chemicals and sewage treatment equipments. We wholesale quality water treatment chemicals for the domestic, commercial and industrial sectors of the market place throughout Australia. Our specialized chemical products are widely used in paper-making, pottery, sewage treatment, metallurgy, printing and dyeing, pharmaceutical, mining, coal washing, leather processing, municipal, textile and other industries.
Due to our commitment to innovation, research and development activities, we are able to deliver significant advantage to our customers and partners. Our excellent services assure our customers to buy good value, high quality chemical products quickly and securely.
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Mineral processing can involve four general types of unit operation: comminution, sizing, concentration and dewatering. In all of these processes, the most important considerations are the economics of the processes and this is dictated by the grade and recovery of the final product. To do this, the mineralogy of the ore needs to be considered as this dictates the amount of liberation required and the processes that can occur. The smaller the particles processes, the greater the theoretical grade and recovery of the final product, but this however is difficult to do with fine particles as they prevent certain concentration processes from occurring.
The fourth unit operation-dewatering- is an important process in mineral processing. The purpose of dewatering is to remove water contained in particles. This is done for a number of reasons, specifically, to enable ore handling and concentrates to be transported easily, allow further processing to occur and to dispose of the gangue. The water removed from dewatering can be recycled through a mineral processing plant. The main processes that are used in dewatering is sedimentation, which operates by passing water into a large thickener or clarifier. In these devices, the particles settle out of the slurry under the effects of gravity or centripetal forces. To aid in the sedimentation process, floculants and coagulants are added to reduce the repulsive forces between the particles. This repulsive force is due to the double layer formed on the surface of the particles. The floculants work by binding multiple particles together while the coagulants work by reducing the thickness of the charged layer on the outside of the particle.