Calcium zinc compound stabilizer Calcium zinc composite stabilizer is a widely used additive in plastic processing, which can improve the stability and weather resistance of plastics, while also enhancing the mechanical properties of plastics. The research and application of calcium zinc composite stabilizers have brought huge development opportunities to the plastic industry. Calcium zinc composite stabilizer, as a green and environmentally friendly additive, does not contain harmful substances and is harmless to human health and the environment. Compared to traditional lead salt stabilizers, calcium zinc composite stabilizers do not release harmful volatile organic compounds during use and do not cause pollution to air and soil. This makes the calcium zinc composite stabilizer the preferred additive in the plastic industry. Calcium Zinc Compound Stabilizer,Calcium Zinc Composite Stabilizer,Calcium Zinc Pvc Compound Stabilizer,Nontoxic Complex Pvc Heat Stabilizer Hebei Xiongfa New materials Technology Development Co.,LTD , https://www.xiongfa-tech.com
Copper molybdenum tailings paste dry heap discharge technology
First, the technical name
Copper- molybdenum ore tailings paste dry heap discharge technology
Second, the scope of application
Mine dressing enterprise
Third, technical content
(1) Basic principles
The tailings are concentrated to form a paste, and the paste pipes are transported at multiple points for discharge and dry storage. It can make the ore dressing plant use the ore dressing wastewater efficiently, which has far-reaching significance for mine production and energy saving in high and cold drought and water shortage areas.
(2) Key technologies
The scientific combination of tailings settlement environment, tailings fluid mechanics analysis, tailings concentration equipment structure and flocculant addition, paste transportation and multi-point discharge.
(three) process
The mixed flotation tailings are fed into the Φ40m deep cone thickener in the tailings workshop through the pipeline, and the flocculant is added to carry out the flocculation and sedimentation of the tailings. The paste of the deep cone bottom flow is fed into the diaphragm pump by the feeding pump, and then the diaphragm pump is used. Pumped into the tailings dam for paste discharge. The deep cone overflow water, that is, the ore dressing wastewater, is directly returned to the high level pool for recycling.
Fourth, the main technical indicators
The tailings bottom stream concentration is 66-68%.
V. Technical status and typical examples
Technical status: The application of paste discharge technology for more than 2 years, through the in-depth study of the deep cone thickening mechanism, the safety and environmentally friendly industrial production of high-cold high-latitude tailings paste storage, to make full use of paste emission to improve the use of mineral processing Wastewater resources, improve the intrinsic safety objectives of tailings storage, and mature technology.
Typical user (instance):
Typical case 1 has been implemented: Wushan Phase I Project
Project construction scale and construction conditions
Construction scale
Wushan Phase I project, processing capacity of 30000t / d
Construction conditions
Construction of large-scale modern mining enterprises in arid and high latitude arid areas
Main renovation content and equipment
Main renovation content
Through the settlement and slurry fluid mechanics analysis, the structure of deep cone thickener and the addition of flocculant are improved to improve the settlement effect of tailings and the utilization rate of wastewater.
Major equipment
Φ40m deep cone thickener, reciprocating piston diaphragm pump DGMB450/8
Investment and efficiency
Investment amount
2.8 billion
Building period
1.5 years
Resource efficiency
Revitalize the low-grade copper ore body (0.24% grade copper, 0.017% of associated molybdenum) and the amount of ore is 228,116,800 tons.
Economic benefit
Annual profit of 630 million
Payback period
6.7 years
Typical case 2 has been implemented: Wushan Phase II Construction Project
Project construction scale and construction conditions
Construction scale
Wushan Phase II Construction Project, processing capacity 35000t/d
Construction conditions
Construction of large-scale modern mining enterprises in arid and high latitude arid areas
Main renovation content and equipment
Main renovation content
The use of the world's largest deep cone thickener and domestic independent intellectual property diaphragm pump to improve the tailings settlement effect and wastewater utilization.
Major equipment
Φ43m high pressure deep cone thickener, reciprocating piston diaphragm pump DGMB630/6
Investment and efficiency
Investment amount
3.5 billion
Building period
1 year
Resource efficiency
Revitalize the low-grade copper ore body (0.24% grade copper, 0.017% of associated molybdenum) and the amount of ore is 228,116,800 tons.
Economic benefit
Annual profit of 670 million
Payback period
5.9 years
Promotion measures and recommendations
The new production process of tailings paste discharge wastewater will be widely promoted in China. Because it is very beneficial to the protection of the environment and the safety of the tailings pond, it will inevitably be promoted rapidly in China. However, this process is still very imperfect, and there are still many problems in adopting this process. In order to speed up the promotion of this process, it is recommended to set up a research and promotion center for paste tailings storage, and organize research on the following topics. To study the structure, localization and serialization of large-scale deep-cone paste thickeners; to study the penetration law of different types of paste tailings and its influence on groundwater system; to study the water-bearing regularity and mechanical properties of paste tailings at different depths And the impact of shock liquefaction on the safety of the tailings pond.
6. Promotion prospects and savings and comprehensive utilization potential
According to the test report of the deep cone thickening and tailings paste transportation of Wushan tailings conducted by three foreign companies, when the tailings concentration is below 72%, the yield stress of the tailings is within 100pa, indicating the concentration of the deep cone thickener. It is entirely possible to reach more than 72%. The mine has decided to use the equipment of another manufacturer to change the structure of the deep cone thickener in the second phase of the Wushan project, and strive to increase the tailings discharge concentration. The second phase will be put into operation in 2012. According to the semi-industrial test that has been carried out, when the discharge concentration reaches 75%, the yield stress of the slurry is 160 Pa. In the production operation, on the basis of ensuring the quality of the overflow water, appropriately reducing the amount of flocculant is beneficial to increase the concentration of the ore, and further improve the utilization rate of the wastewater to 85-91%.
Wushan is located in a region with severe water shortage and extreme cold. After comparison of multiple schemes, it can only be directly returned to the utilization scheme by using tailings paste discharge wastewater. It is the key to the construction and production of Wushan copper-molybdenum mine. Therefore, its economic benefits can only be evaluated by the economic benefits of the entire project. The project was put into production in September 2009, and reached the design production capacity in the same year. In 2010, the total production value was about 1.8 billion yuan, and the total profit and tax was about 1 billion yuan. In 2011, the total production value was about 1.9 billion yuan, and the total profit and tax was about 1.04 billion. Yuan, the economic benefits are very significant.
The rapid rise of China's economy, the construction of various types of mineral processing plants has sprung up. Wastewater utilization is linked to the construction of the concentrator. Therefore, the direct recycling of tailings paste discharge wastewater will be a revolutionary change for the traditional beneficiation wastewater treatment process. This new paste discharge process will certainly be widely promoted in China. The social benefits it brings are considerable. The tailings paste discharge wastewater reuse process can be promoted except for rainy areas. The most desirable place is a region with arid climate, flat terrain and relatively desolate conditions. In this place, it is not even possible to build a tailings dam. Can save a lot of investment. This condition is found in many parts of Inner Mongolia, Xinjiang and Northwest China.