Archive for May, 2010

    Into the Castle Peak surrounded Dexing Copper Mine, Jiangxi Copper Corporation, a clear little river through the ten-mile mine, it seems a wonderful poem, like a pleasant song, turning to flow in the river of the Xintian copper-workers. This lively creek, had been attached to the Japanese as a scar on the bridge while stepping off tens of thousands of miners, residents hearts; It may also be a “heart stone”, so that the leadership of Jiangxi Copper Group, were always concerned about.

    The river is called big dock river, once flowing with a reddish-brown acidic water. For this reason, large dock River to be known as big “polluted” river. Large dock River is a tributary of Le-an River, one of the town official hat originated in Dexing City Sizhou mountain stream consistently mine alone, 14 kilometers long, the catchment area of 34 square kilometers. Over the years, brought together past and present mining operations or the old hole-hole of acidic mine water and domestic sewage into the post-Le-an River, leading to acidification of the downstream part of the river water, affecting the local people’s production and life.

    Tracing along the Grand River dock which, in the 290 pipeline at the end of tunnel, a narrow ditch Yi Gu Yin flow out from the depths of the mountain, with 10 meters away and down a vertical flow of springs than a sharp Yes. This large “dirty” river has more than 1,000 years history. Large “dirty” river three kilometers up the river dock is a major source of – the old hole-hole group. Since the Tang dynasty, first one in this piece discovered in a rich copper, sulfur minerals, and left a disused mine. The waste water is from where these mines since ancient times but now a steady flow of the ditch flow through to import large dock River flood tunnel, become a major Hollywood River water pollution is one of the culprits.

    The head of the Greater dock catchment area of 2. 06 million square meters, of which 1. 37 million square meters pool of water, have been on this river dyed dark brown with the inflow of sewage river dock. How can we bring this dark brown “harm group of water” from the clear water and kick out the base? Dexing copper ore mine director Jiang Boliang and other leaders on several occasions after the intense summer heat to the field investigation: “To clean up diversion measures could be taken to reduce the amount of copper acidic waste water” idea. This idea, which coincides with the idea of environmental protection experts.

    Introduced a good option is not easy to implement ever more difficult. Budget on the impressively displayed: sewage pipes more than 5000 meters, at an altitude of 170 meters, 140 meters, 110 meters respectively, stopped construction of three sewage dam, I wish the family farm waste rock, Yang TAOWU waste rock yards and the water around the Longshan waste rock to build a market ring flood discharge trench, these projects need to invest huge amounts of money. Jiangxi Copper Group, Party and government leaders Erhuameishui, from the limited funds allocated special funds: “As long as can sewage treatment is good, the money spent must be spent. ” Thus, in less than two years, the pipe rack up, Trash dam built, and large “dirty” river of water complete with large dock River parted ways, each of 3. 3 million tons of water down the waste rock fields around the flood discharge trench neatly into the big river pollution.

    As we all know, open-cast mining field stripping of ore and waste rock site stockpiling of waste rock containing pyrite by oxidation and leaching after the rain will produce acidic waste water containing heavy metal ions. In the acidity of the highest in the water competing PH value of 1. 9. If the use of traditional techniques into the sewage treatment station, difficult to say the least cost alarmingly high. Hardware is put into a one-time benefit from a hundred years, the sewage transformation is a long-term consumption, how can we reduce costs?

    Since mining operations for the acidic waste water, while the processing operations will generate a large number of alkaline waste water. Can the two directly in the waste and then? After testing, the experts launched a “large and medium pH and the” new program, according to the acidic water flows into a three-way, along with the pumps transported to the mountains concentrator tailings launder, and with the slot of the base directly in the tail of the pulp and response; the other way transferred to Sizhou concentrator with this plant and in the production of waste water; the remainder transported to the industrial wastewater treatment plant in progress and reaction with lime. Response after the neutral water is all the focus on the 4 # tailings, after settling back into the dressing then be used as a production process, and in this closed the channel repeated recycling. Apart from some natural phenomena such as water loss due to evaporation, the water reuse rate of 96%, and an annual cycle of water consumption amounts to more than 300 million tons, not only in the alkaline mineral processing without the outer row was also consumed over 6000 tons per day acidic water, acidic water efflux basically solved the phenomenon. At the same time, but also for the community to save a lot of water resources.

    Dexing copper mining area in the heap leaching copper works site, the 1000 aerial spraying out of the water column, such as a group of water-dragon play, and if the square musical fountains. This is the Jiangxi Copper Group “turning waste into treasure,” another classic – dumps leaching.

    In the mining process, technology, the researchers found that those cute and repulsive acidic water is also a rare treasure, it can break down waste rock in the copper metal. Jiangxi Copper Group, through brainstorming, scientific analysis and demonstration, has invested heavily built up a heap leaching plant, the acidic waste water reservoir tank with the pump hit a high, and then connect spray facilities, so that bacteria in acidic water spray These abandoned low-grade ore, the complete decomposition then returned to the acid reservoir. Heap leaching plant is under the water density, the higher the copper content of acidic water electrolysis. The implementation of this technology not only reduce pollution, but also recovery of copper from the acidic water, the amount of 1,500 tons, the output value created in each of 4 thousand million.

    As of 2004, the Jiangxi Copper Group invested a total of 220 million water pollution for large dock River comprehensive management project, the completion of various types of pollution control and comprehensive utilization of facilities, almost 40 sets of equipment. July 20, 2005, deputy director of Jiangxi Provincial People’s Congress penkun birth to check the environmental protection Dexing Copper research work, sincerely, said: “From Lean river environment, than in the past has been greatly improved, which fully shows that Jiangxi Copper Group’s environmental work is very fruitful, enterprises have a strong sense of social responsibility!