Zhaoyuan: the "golden" waste tailings "turned gorgeous"

Zhaoyuan is the largest mining city, known as the "China gold capital" reputation. But the gold mining in a "gold" at the same time, there exist a lot of tailings. The traditional tailings discharge is accumulated in the special tailings reservoir, which not only occupies a large amount of land, but also brings great pressure to the ecological environment protection. In the exploration of intensive land use, Zhaoyuan gradually tried to adopt the method of "eating" tailings, which also allows the original waste to start "transfiguration" resources, easing the pressure of land use and environmental protection. Save the backfill of Hexi Gold Mine 9 acres of land occupied West Canzhuang Gold Deposit is located in the town of Zhaoyuan City, in recent years in the tailings backfilling aspect account really many. "Our tailings automatic filling system cost 1 million 200 thousand yuan, and then additional investment of 1 million 800 thousand yuan of special funds, using new material cementation instead of ordinary cement cementation new process." In March 20th, Hexi gold mines, production minister Zhang Peimin said. Zhaoyuan is a large mining city, the city has 77 types of mining rights, 38 concentrator, the actual processing capacity of more than 1000 tons per year. The waste after mineral processing is "tailings", and the traditional treatment method of mine production enterprises is to expropriate land, build tailings pond and discharge tailings to the surface. What is the tailings backfill, through technical processing to the mine tailings re buried in the. "Tailings backfilling, early investment does increase a lot of cost to the enterprise, but careful comparison, still more cost-effective than emissions to tailings."." Hexi Gold Mine deputy general manager Wang Laijun said. Because the tailings storage site requires far away from residential areas, the existing two tailings dam of Hexi gold mine is 4 kilometers away from the production area. Previously, in order to discharge tailings to the reservoir, Hexi Gold Mine specially installed the corresponding length of the transmission device, and equipped with high-voltage power supply will be uninterrupted for 24 hours. "Actually these are small, the biggest pressure surface emission model from land acquisition and environmental impact assessment." Wang Laijun said. Two Hexi Gold Mine Tailings occupies a total area of more than 300 acres, but has been used for 40 years. According to the annual output of about 100000 cubic meters of tailings, if it has been discharged to the tailings reservoir, the existing storage capacity to meet the demand is somewhat difficult, only land acquisition of new tailings. The tailings are usually in the area of mu, now land costs continue to rise, the area overhead certainly so big a lot. Even if the enterprise can also sign to the ground, it is difficult to pass through the environmental review. We roughly estimate, now a new 100 acres of tailings, the cost at least 10 million yuan." Wang Laijun said. In accordance with the current processing technology of Hexi gold mine, the proportion of tailings surface discharge and backfill underground is about 1:4, which is equivalent to 9 mu of land occupation per year. "Eat" for the idea, the tailings into new building materials production and raw materials of Jiehe gold deposit in Xinzhuang Town of Hexi gold mine not far, in comparison, treatment of Jiehe gold deposit relatively one more step. In the adjacent side of gold, Jinhui new building materials company production workshop has been like a raging fire. "Compared with traditional building materials, our foam concrete block function is similar, but light quality, good insulation, very popular with the market, now the production capacity reached 150 thousand cubic meters per year."." Liu Guitang, general manager of the company said. Surprisingly, the 150 thousand cubic meters of new building materials, the production of raw materials are gold mine tailings tailings. Compared with the Hexi gold mine, the production scale of Jiehe gold deposit is relatively small, but the gold annual production capacity has reached more than million. Due to the supporting of tailings is also small, along with the production capability, storage capacity is also increasing pressure. Another point is that the traditional tailings pond is bare surface, windy in spring, often appear dust phenomenon, which will be responsible for the environmental protection department." General manager Xu Shunli said Jiehe gold deposit. First, adopt the backfill technology of Jiehe gold deposit, but the researchers gradually discovered using new. Tailings after crushing processing, the component can be used as building materials processing, and scientific research institutions after university cooperation demonstration, Jiehe gold deposit decided to embark on the production line, set up in the same group of building materials company. "Our new building materials, annual production of 150 thousand cubic meters, which means that the new year can" eat tailings ", and also from the original surface Kuzhongla raw materials were digested tailings." Liu Guitang said. However, the industry in Zhaoyuan as the innovation way of Jiehe gold deposit is not too much. The statistical data of Zhaoyuan City Land Resources Bureau, the city's more than 80% production enterprises is the gold mine tailings filling mining method, the city each year for mine tailings filling volume reached 6 million 400 thousand tons, accounting for 70% of the total tailings to 80%, down conversion, the annual savings accounts for more than 240 acres of land. The reclamation of Jiang Jia Cun, Zhaoyuan city mayor tailings corn index a year in about 500 acres, more than 240 acres of land can save tailings backfill. Seems a lot, but compared with the Jiuqu Jiang Village, is a "snack". Last year, the tailings in this village is a great news for mine Temple House grow corn. Jiuqu Jiang Fu village is located in the town of Zhaoyuan City, the gold mine is rich in resources, cultivated land resources are relatively tight. In the past the village more than 200 acres of land is divided into more than 300 blocks, known as the biggest piece of 13 acres. Last year grow corn "reservoir area reached more than 140 mu. I heard such a large village, many elderly people are specially came to see. This is only a small part of the Jiuqu Jiang Village tailings land reclamation planning, land planning total built area reached 3000 acres