tailings dry row process
Tailings dry row is a new tailings disposal technology emerging in recent years in China. It refers to the tailings pulp discharged by the beneficiation process after multi-level concentration, and then processed by high-efficiency dehydration equipment such as dehydrated vibrating screen to form small water content , Easy to precipitation and solidification of the use of site storage of slag, slag can be transported to a fixed location for dry storage.
Through the concentrated dewatering process, the ore stem row is prepared into the material with the moisture content of 10% ± 2 by weight and transported to the tailing pond and the row of the tailings through the beneficiation process to extract the valuable matter in the ore. A process used to stockpile or recycle.
The main process is as follows: concentration equipment + dewatering equipment + conveying equipment; the selection and transportation of process equipment are determined by the material properties, specific gravity, particle size distribution, processing capacity and so on, as well as on-site geographical conditions.
Its main significance lies in alleviating the pressure of the tailings reservoir, reducing the hidden dangers of tailings pond, increasing tailings re-use means, access to green environment-friendly mining system.
At present the main problem: the shortcomings of tailings dry row process mostly lies in the tailings of fine-grained material dehydration difficulties, especially in the choice of dry heap of iron ore and gold, the size of the gold ore production due to the need for more granular size distribution tends to be small, Most of the iron ore due to open-pit mining which more soil composition, as a result of fine-grained material caused by dehydration difficulties, many tailings into the cyclone, and then into the shaker, into the dense machine, thick machine bottom flow back to vibration Sieve, so that although the thickener of the handling capacity and operating load decreased, but it caused the dense machine thick process cumbersome, fine-grained material infinite loop and the gradual increase in the number of dense machine characteristics due to fine-grained material (- 200/80% or more can cause this problem) dense effect itself is not good, so the long sedimentation process, the bottom flow concentration of less than the target requirements, the same use of dense pools and sedimentation tanks and the thickener of the same results, Explore a pair of technology, first of all we have to embark on the road, the problem is so obvious that can not face the front, the results can be imagined. 1 The above process is only the right technology in the actual problem 2 cumbersome and embark on the wrong process everywhere 3 we explore not only tailings dry process, there are other related process areas need attention (stockpiling, and then The use of environmental protection, etc.) 4 fine-grained materials processing, through the process to gradually reduce rather than increase, which requires the choice of process and understanding of the process equipment and process equipment selection.