published date: 11-14-2018
In recent years, the sewage sludge production of China’s urban sewage treatment plants has increased rapidly with economic development and population increase. Due to the large volume of sludge and high water content, the sludge volume can reach tens of times the volume of solids contained in it. The nature is very unstable and extremely perishable, which is not conducive to transportation and disposal. Therefore, as a waste with huge environmental pollution hazards, how to properly dispose of sludge has become an environmental issue of public concern.
Sludge conditioning is the key to sludge treatment and treatment. It overcomes the electrical repulsion and hydration, improves the physical and chemical properties of the sludge, reduces the affinity with water, enhances the cohesive force, and increases the particle size to improve the dewatering performance of the sludge. Improve the dewatering effect, reduce sludge capacity, reduce transportation costs and subsequent disposal costs. In view of this, the present invention uses gold tailings as a raw material to prepare a high-efficiency sludge flocculation and dehydration conditioning agent.
The dry tailings discharge system is a new generation of tailings processing equipment developed by LZZG on the basis of tailings dewatering equipment. Its main role is to promote the reuse of tailings, such as mine tailings waste rock, coal gangue, limestone, fly ash, red mud, smelting slag, and other industrial solid waste resources, comprehensive reuse of tailings resources Convert to a new product.
The gold tailings are wastes discharged after the gold ore has been finely extracted from the gold concentrate powder. It is a yellow powder with a small particle size and a relatively uniform particle size distribution. It contains more SiO2, CaO and a certain amount of F%03. , A1203, MgO, have higher surface energy and potential reactivity. Gold ore has a very low gold content, and how much ore is discharged from the production company.
The China Gold System has discharged more than M5 million tons of tailings per year. At present, the comprehensive utilization rate of tailings is very low, and it is still treated by the storage method. It not only occupies a large amount of land but also causes environmental pollution around the tailings pond. It also requires a large amount of capital for the construction and maintenance of the tailings pond. Therefore, for gold tailings. Comprehensive utilization has become an important issue in the comprehensive utilization of gold mine resources and the protection of the ecological environment.
The content of each element in the gold tailings is related to the type of ore. The quartz ore-based tailings SiO2W mass fraction can reach 60% 90%; the original ore is calcite and limestone-based tailings, the mass fraction of CaO can reach 10 30%; the ore is kaolin-based tailings, Al2O3 The quality score can reach more than 20%.
Therefore, the composition of the tailings produced by different ore mines is also different. The elements such as Si, Al and Ca are the main components of the composite inorganic polymer sludge dehydrating agent. Therefore, research on the preparation of sludge dehydrating agent for gold tailings of different ore mines to maximize the resource disposal of tailings It is a new direction for future research of tailings treatment.
1. Useful minerals in gold, silver, copper, tin, lead and zinc, molybdenum, iron ore, precious metals, non-ferrous metals, ferrous metals and non-metallic tailings, waste rock, coal gangue, red mud and fly ash. The valence element is extracted and recycled.
2. Mine waste rock, tailings, coal gangue, red mud landfill, filling treatment, sand washing.
3, tailings industrial solid waste comprehensive utilization project application new technology development, new product formula design; production quality standards are qualified; applicable to building panels, hollow bricks, concrete, highway construction, highway construction, subway construction, railway construction, Real estate construction and many other areas.