Science and technology change life, can also change the mine.
A reporter from China Mining News recently came to Luoyang Luanchuan Molybdenum Industry Group Co., Ltd. (hereinafter referred to as Luoyang Molybdenum Industry) and saw that the mining operations in the huge Sandaozhuang open-pit mining area were carried out in an orderly manner. The intelligent production control system of metal open-pit mine easily realized the remote control of the whole process of mining, ore blending and transportation. A world-leading unmanned intelligent mine has emerged.
Ecological Restoration and Treatment of Shuishou Ditch Slag Discharge Field
In recent years, Luoyang molybdenum industry has polished the green brand, consolidated the green foundation, expanded the green connotation, and led the intelligent and green development of China's open-pit mining industry through the "green and intelligent" two-wheel drive.
Smart: Casting the future of mines
Intelligent mine construction is a global trend, national strategy, but also the needs of social livelihood and enterprise development. Using information technology to transform traditional industries is an important task for the adjustment of national economic structure and the transformation of economic growth mode, and it is also one of the core contents of green mine construction.
Into the Luoyang molybdenum industry, everywhere can see the shadow of intelligence. There are few people in the open-pit mining area, the vehicles in the mining area are unmanned, and the mineral processing workshop is unmanned. Even some more complicated processes such as mine perforation, shoveling, vehicle grouping, and mineral rock measurement have also realized unmanned operations.
"In recent years, Luoyang Molybdenum Industry has taken the construction of first-class green mines as its goal, the intelligent mining of mines as its direction, and the goal of achieving intrinsic safety, reducing costs and increasing efficiency, and improving the working environment. It has promoted the construction of intelligent mines in the intelligent production control system of open pit mines, the research and application of intelligent equipment for open pit mining, and the automation of the whole process of mineral processing, and is committed to building the world's leading unmanned intelligent mines." The company's deputy general manager Jing Shigun said.
Easy to know but difficult to do. For a long time, mines were labeled as low-tech and labor-intensive. In order to build an intelligent mine, the company starts with building a smart "brain" of the mine and builds an intelligent production control system for open-pit mines.
Sandaozhuang open-pit mine carries the ore supply tasks of 5 molybdenum concentrators and 3 tungsten concentrators. It is necessary to comprehensively consider multiple factors such as molybdenum grade, tungsten grade, copper grade, oxidation rate, lithology, etc., to achieve a balanced ore supply with extremely high difficulty. On the basis of the digital mining integration system for polymetallic open-pit mines in 2012, the company, together with Xi 'an University of Architecture and Technology, has built an intelligent production control system for polymetallic open-pit mines based on cloud platform by integrating three-dimensional geological model, intelligent ore blending, intelligent scheduling, intelligent metering and big data decision-making analysis with a series of cutting-edge technologies such as a new generation of Internet of Things, big data and artificial intelligence.
"The intelligent production control system is like the 'brain' of a mine, with the characteristics of intelligent perception, intelligent calculation, intelligent analysis and intelligent decision-making. After this system is put into operation, the ore distribution management, production scheduling, ore rock measurement and site management are more intelligent and scientific, greatly improving the efficiency and management level of mine production operations, and solving the problem of multi-objective and multi-factor balanced supply of mines." Well stone roll said.
In order to further solve the serious safety hazards in the goaf, the company also strengthened its "limbs" and strengthened the research and development and application of intelligent mining equipment in open-pit mines. In 2016, they cooperated with Henan yuexin intelligent machinery co., ltd. and gradually established a set of efficient, practical and safe open-pit intelligent mining equipment system according to the steps of remote control of production equipment operation → remote control operation → intelligent unmanned operation, realizing long-distance remote control operation from perforation, shoveling and truck transportation. Intelligent mining equipment operates efficiently, not only recovering 820000 tons of residual ore and increasing the output value by 0.164 billion yuan, but also changing the traditional manual driving mode and achieving the goal of intrinsic safety. The technology won the first prize of scientific and technological progress in China's non-ferrous metal industry.
Mine intelligence is never ending. Since 2018, the company has set a precedent in the field of intelligent mining, using the developed driverless system to modify the original equipment, and realized the successful trial operation of 15 pure electric intelligent unmanned mining trucks. In 2019, they will work together with Huawei, Yuexuan and other partners to take the lead in applying 5G technology to unmanned mines in the country. They will upgrade and transform the original intelligent mining equipment based on 5G network. Using the characteristics of ultra-high speed and ultra-low time delay of 5G network, they will completely solve the technical bottleneck of signal transmission in the special complex environment of mines, and the accuracy, stability and work efficiency of operations will be greatly improved, it realizes the ultra-remote precision control of drilling, shovel and loading based on 5G network and the intelligent formation operation of pure electric mining trucks. In June 2019, at the site of the Shanghai World Mobile Communications Conference, the company's operators used 5G technology to control the Sandaozhuang open-pit mining machine 1200 kilometers away to operate in real time. The operation delay was controlled within tens of milliseconds and the error was more than 10. Centimeters, caused a strong response in the industry.
The future of mining will be the perfect combination of smart and green. The company knows this. They also jointly implemented the project of "research and development and application of pure electric mining dump truck and energy recovery system" with Henan yuexin intelligent machinery co., ltd. the SY series pure electric mining truck developed uses the energy feedback down the mountain to compensate each other with the energy consumed up the mountain. When the vehicle is braking or coasting, the kinetic energy is converted into electrical energy and stored in the battery, which can not only extend the use time and cruising range of the vehicle, but also reduce mechanical wear and energy consumption. Compared with the same power diesel transport vehicles, the energy consumption of this type of vehicle is only 1/6 per ton kilometer, and the maintenance cost is only 1/2. After inspection and testing by the National Mining Machinery Quality Supervision and Testing Center, the vehicle has the significant advantages of environmental protection, energy saving, low cost, low investment, and easy promotion. On the basis of "zero emission", key technical indicators such as acceleration, climbing, and cruising range All are in the forefront of the industry, bringing a revolutionary storm to open-pit mining transportation equipment.
It is understood that the vehicle adopts pure electric and energy recovery system, which realizes the perfect combination of intelligent equipment and new energy transformation, and has become a green environmental protection intelligent mining equipment integrating pure electric drive, remote control intelligent remote control and unmanned driving. Industry experts said the move broke the technology monopoly of foreign mining equipment companies and opened a new journey for China to build green smart mines.
Science and Technology: Stimulate the Unlimited Potential of Resources
Waste is misplaced wealth. In recent years, relying on scientific and technological innovation, the company has strengthened the comprehensive and efficient utilization of associated resources and industrial wastes, and achieved good ecological and economic benefits. Especially in recent years, under the severe situation of the general recession in the main molybdenum industry, the company has achieved a good momentum of development through efficient and comprehensive utilization of associated resources.
In terms of resource development, they have developed and formed a collaborative technology for open-pit mining and empty area treatment in view of the extremely complex empty area group in the Sandaozhuang mining area, and carried out a demonstration project for empty area treatment and recycling of residual ore. In the past five years, they have treated a total of 1.39 million cubic meters of residual ore in the empty area, realizing the recovery of residual ore and safe and continuous mining of open-pit ore.
To science and technology to comprehensive benefits, relying on science and technology to create an ecological economy, Luoyang molybdenum industry has been pursuing the goal. After more than 20 years of exploration and technical research, they have made a series of major achievements in the comprehensive utilization of resources, realized the industrialization and high efficiency of the comprehensive utilization of molybdenum associated tungsten resources, filled the domestic gap in the beneficiation of low-grade scheelite, reached the international leading level, and won the "second prize of national scientific and technological progress award", "the nomination Award of the fourth China Industrial Award" and "the first prize of science and technology of China nonferrous metal industry". The "copper sulfide activation and flotation recovery process for ultra-low grade copper" developed by them has realized the recovery, utilization and industrialization of extremely low grade associated copper (copper grade 0.01, only 1/10 of the comprehensive evaluation index). In 2018, 5451 tons of copper concentrate with a comprehensive recovery grade of 20% was recovered from molybdenum selection tailings. They developed a "leaching purification, exchange adsorption, desorption, evaporation crystallization" molybdenum concentrate roasting tail gas rhenium comprehensive recovery process to achieve rhenium resources comprehensive recovery industrialization.
"Our low-grade scheelite, very low-grade copper, and roasted tail gas rhenium comprehensive recovery technologies are all selected in the sixth batch of'Mineral Resources Conservation and Comprehensive Utilization Advanced and Applicable Technology Promotion Catalog', which is useful for the promotion and application of technologies and the improvement of market competitiveness. Reference and demonstration significance." Jing Shikun said that the comprehensive utilization of co-associated resources is now an important profit growth point for the company, and the company has also been rated as one of the 40 resource comprehensive utilization demonstration bases of the former Ministry of Land and Resources and an advanced mining enterprise for the rational development and utilization of mineral resources in the country.
For smelting tail gas, the company is also thinking of turning harm into profit and recycling. In the aspect of molybdenum smelting tail gas treatment, they respectively adopted the co-developed "rotary tube kiln roasting molybdenum concentrate low sulfur flue gas unstable state acid making process" and the imported WSA wet gas acid making process of Denmark's TOPSOE company to implement comprehensive treatment and recycling of tail gas sulfur dioxide, with an annual output of 35849 tons of industrial sulfuric acid and an annual reduction of 23411 tons of sulfur dioxide emissions. At the same time, they have also carried out a comprehensive recovery and transformation project of very low grade iron, which will realize large-scale recovery of very low grade iron after the project is put into operation. In terms of fluorite recovery, they have jointly carried out scientific research with a number of scientific research institutions, and now they have made positive progress.
Green: Dress up the beautiful home of the mining area
The company attaches great importance to environmental protection and ecological restoration, adheres to the harmonious coexistence of man and nature, the win-win situation of ecological protection and enterprise benefits, and the coordinated development of resource development and environment. Combined with the mining practice of Sedaozhuang molybdenum mine, the company carries out ecological restoration and governance in accordance with the principles of mining, restoration and governance.
At the end of 2005, after long-term discharge, Shuishougou slag discharge site formed an "artificial plain" with an area of 200000 square meters ". In January 2006, Luoyang Molybdenum Industry invested more than 700 million yuan according to the environmental protection idea of "protecting the ecological environment and creating beautiful mountains and rivers" and the standard of building a mine park. It dispatched more than 1000 excavators, forklifts and other equipment to level the slag discharge site. In combination with the local climatic conditions, it planted more than 30000 species of cedar, juniper, red tung and other 10 species suitable for growing in alpine mountainous areas. In order to ensure its survival rate, they adopted measures such as regular watering and plastic film covering and moisturizing. Now, a beautiful garden landscape has been formed here, in which red flowers and green leaves complement each other, trees and shrubs set off each other, and simple and elegant pavilions are decorated. It not only created a precedent for vegetation restoration in the mining industry in western Henan, but also played a role in promoting the construction of harmonious mines, and added new highlights to Luanchuan's tourism.
In order to make the soil and water conservation and vegetation restoration meet the requirements of reasonable layout, sustainable utilization and obvious effect, they draw lessons from the greening experience of Shuishougou slag field, specially invite scientific research institutions to conduct special research on the slag discharge field and slope that have reached the service life, and according to the proportion of soil and stone in each area, three kinds of vines, three kinds of woody plants and seven kinds of herbaceous plants, including native, cold-resistant and drought-resistant Kudzu, Robinia pseudoacacia, Lonicera japonica and Medicago sativa, were selected respectively to afforest the waste residue dump which reached the service life. In terms of vegetation restoration, management and protection, they adhere to the principle of combining contracting responsibility with ensuring the survival rate, clarify tasks, and assign responsibilities to people to ensure that one piece is restored and one piece is alive. As of the end of 2019, the cumulative vegetation restoration area of Sandaozhuang Molybdenum Mine in the dump, final slope, fixed industrial site, etc. reached 1.91 million square meters, effectively protecting the living environment of animals and plants, avoiding soil erosion, achieving the purpose of ecological restoration, and promoting harmony between man and nature, the ecological restoration management mode of "functional engineering construction-slag discharge-solidified slag field remediation covering soil-vegetation restoration-slag discharge service expiration-comprehensive closed remediation covering soil-comprehensive vegetation restoration" has been formed.
"After years of comprehensive management and ecological restoration, the current Sandaozhuang mining area is basically ready for a mine park. According to the long-term plan, the mining area will eventually form a modern industrial tourism area with rippling blue waves, abundant water and grass, flying birds, blooming flowers and trees, becoming a new classic in Luanchuan." Well stone roll said. □
Website Editor: Gong Li
