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When the inspector carried out | Cili Ni-Mo ore slag pollution mussel has so far formed a yellow "waterfall"?

  • Mosten
  • 10 Apr

If the slag is not properly treated, it will bring serious negative effects to the local soil safety and water quality safety. On August 1, the seventh environmental supervision team of Hunan Province went to Dongxi Township Nickel-Molybdenum Mine, Cili County, to conduct on-the-spot inspection of slag treatment. Nickel molybdenum slag pollution yellow "waterfall" inspection group along the winding mountain road along the way, the mountains on both sides of the lush, in sharp contrast to the road side of a yellow "waterfall" into the eye. The rocks behind the waterfall are yellow rust, with a leachate collecting pond next to it, but no leachate has flowed into the pool, the connected pipelines have also been washed away by flash floods, and untreated leachate flows wantonly down the cliff. Stay straight down the low-lying side into another nickel-molybdenum dregs yard below the road. This waterfall is due to the formation of leachate from the accumulation of nickel-molybdenum slag. The leachate contains sulfur and phosphorus and is strongly acidic. The pH value of the leachate is between 3 and 4 by PH test paper in the field. The slag at the bottom of the road has been buried green, but a waste water treatment facility under the slag has not been used. The inspection team came to another yard not far away, and the slag had been filled with green and drainage channels had been built, but no leachate collection network had been found. Led by the locals, the inspection team came to the operating Baizhu Yu sewage treatment station at the Cili nickel-molybdenum mine, where a small amount of waste water flowed into the wastewater collection tank, and sludge was loaded on the sludge truck to be transported to the garbage treatment station. Plant personnel said that because the waste water can not meet the water requirements, the equipment can only open, stop and stop. The inspection team examined recent operating records and found traces of suspected modification of the records. The leachate flowed into the ditch and the water inspection team of local residents came to an abandoned mine. The mine had been filled with water from the mine hole. As the water gushing with flowing silt, the water was turbid yellow, and the pipes connected to the wastewater treatment station had been blocked. Surrounding residents say that in the event of heavy rain, the water gushing from the mine overflows onto the road and into ditches and rice fields, with yellow traces of running water on the road. The inspection team visited the village of Da Hu and Baizhuyu where the masses complained, and found that the massesundefined complaints were basically true. Due to the imperfect construction of the collection network of leachate, many places of leachate directly flowed into the ditch. Yellow and white leachate can be seen everywhere in the ditch of Baizhuyu Village and mixed with the original ditch water into the downstream. As a result of mining, once clear the bottom of the stream has no longer been used, ditch water has been completely unable to use, villagers drinking water has to go farther to the mountains, spend a thousand yuan to build pipes, water into the home. Nickel molybdenum slag treatment has a long way to go in order to deal with these slag, the local government also think of a lot of methods. As a concentrated area of nickel-molybdenum ore mining and separation, about 1.8 million cubic meters of historical waste residue in Cili County has not been safely disposed of, resulting in a large amount of acid-containing and nickel-containing leachate, which flowed into the downstream gully with the water from the mine cave, resulting in the water quality of the Jiantan cross-section exceeding the standard. In 2012, the Cili government carried out large-scale governance, and at present, all nickel-molybdenum mining and processing enterprises have ceased production. Since 2014, the county party committee and county government has invested about 100 million funds to treat nickel-molybdenum ore slag, and it is expected to build five phases of heavy metal treatment projects. At present, phase 1, 2 project has passed provincial acceptance, phase 3, 4 is applying for acceptance, ready to carry out phase 5 management project. The environmental quality of the whole region has been improved to a certain extent, and the serious water quality of Jiantan cross-section has also been alleviated, but the task of continuing treatment is still very arduous, the fund gap is large, and the management technology and the follow-up operation and management need to be further improved.

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