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the electrolytic aluminum industry is an important basic raw material industry in my country and a key area of ​​energy consumption and carbon dioxide emissions.special action plan for energy saving and carbon reduction in the electrolytic aluminum industrya series of goals have been proposed: by the end of 2025, the proportion of production capacity above the energy efficiency benchmark level in the electrolytic aluminum industry will reach 30%, and the proportion of renewable energy utilization in the industry will reach more than 25%. by implementing energy-saving and carbon-reduction transformation, the electrolytic aluminum industry will save about 2.5 million tons of standard coal and reduce carbon dioxide emissions by about 6.5 million tons from 2024 to 2025...

when a reporter from china development and reform newspaper participated in the "unlimited wind and solar power, green state power investment inner mongolia tour" event a few days ago, through the investigation of the huolin river circular economy demonstration project and the baiyinhua "coal-electricity-aluminum" circular economy industrial chain in huolin gol city and xilinhot city of inner mongolia autonomous region, it was found that in the first half of this year, the green electricity consumption of huolin river electrolytic aluminum reached 27.58%, and the proportion of clean energy electricity consumption of baiyinhua aluminum power company reached 30%, which has exceeded the national target requirements for the industry to be achieved by the end of 2025.the aluminum industry in the two places took the lead in becoming a "green industry" in the countryit will open up new paths for the industrialization and large-scale development of clean energy and the optimization and adjustment of high-energy-consuming industries, and it will have important demonstration significance for promoting the coordinated development of new energy industry and aluminum industry.

baiyinhua green power aluminum recycling industry project

in august, the scenery of holingol is intoxicating and full of vitality. among the mountains in the heart of the horqin grassland, 266 wind turbines stand proudly in the wind and more than 360,000 photovoltaic panels shine in the sun, continuously supplying green energy to the holing river circular economy local power grid.

the huolin river open-pit mine, one of the five largest open-pit coal mines in china, is the foundation of the huolin river circular economy, with coal reserves exceeding 13 billion tons. however, the inferior coal produced during the production process cannot be transported out due to its defects such as easy dispersion when exposed to water and easy breakage when exposed to hard objects. long-term storage will also cause spontaneous combustion, resulting in a large waste of resources and environmental pollution, and is regarded as "ecological garbage." to solve the problems caused by inferior coal, the best way to deal with it is to consume it on the spot, but at that time, the annual output of inferior coal in the huolin river coalfield reached nearly 10 million tons. what kind of downstream industry can consume such a huge amount of coal?

at the same time, the electrolytic aluminum industry in the horqin river region has begun to take shape and the technology has become quite mature, but the large-scale purchase of industrial electricity has caused the cost to remain high. in addition, the price of electrolytic aluminum has fluctuated greatly, and the development of the enterprise has fallen into a trough.

in 2010, the former china power investment corporation mengdong energy (the predecessor of state power investment corporation of inner mongolia) actively responded to the national policy of "developing and utilizing renewable resources". at the same time, in combination with the development trend of the country's power system reform, industrial policy adjustment, and energy structure change, relying on the company's original industrial layout in the mengdong region, it creatively proposed the strategic concept of building the huolin river circular economy. with this concept, the former china power investment corporation established a working group, officially launched the huolin river circular economy demonstration project, and began on-site surveys and research and demonstration of the feasibility of the project.

at that time, the domestic wind power and photovoltaic industries began to emerge. the randomness and instability of wind power also brought new challenges to the consumption of wind power and the safe and stable operation of the power grid. at the same time, energy-saving, efficient and environmentally friendly units could not be fully and effectively utilized, and the phenomenon of abandoning water, wind and light was prominent. with the issuance of the "several opinions of the state council on further promoting the sound and rapid development of inner mongolia's economy and society" in 2011, in order to innovatively implement the requirements of the document, the former china power investment mengdong energy focused on "good and fast development", that is, not only could it not destroy the ecological environment for its own rapid development and affect the normal life of local herdsmen, but also drive the local economy and restore the natural ecology through circular economy projects; it must not only create mountains of gold and silver, but also protect the green mountains and clear waters. therefore, when planning, the former china power investment mengdong energy not only took into account the synergy of "coal-electricity-aluminum", but also determined the development direction of building new energy and promoting green transformation, thus taking into account the two main lines of ecological protection and economic development, and achieving a win-win situation for enterprises and local governments.

according to"use coal to generate electricity, use electricity to smelt aluminum, use aluminum to generate electricity, and use electricity to promote coal production"in august 2012, the construction of the huolin river circular economy demonstration project started. two 350mw low-quality coal cogeneration units and 300mw wind turbines were newly built, and a local area network project and power monitoring center were built. in august 2014, the first three phases of the huolin river circular economy demonstration project, with a total capacity of 300,000 kilowatts of wind power projects, were fully connected to the grid for power generation. the huolin river circular economy entered the "wind-fire complementary" power generation period and officially took the first step in the green transformation. in october of the same year, with the two 350,000-kilowatt thermal power units put into operation, the huolin river circular economy demonstration project was fully completed and put into operation.

over the past ten years, while improving the safety and stability of the circular economy power supply, the horqin circular economy demonstration project has optimized the efficiency and power generation costs of fire, wind, light and storage systems through technological transformation, reducing coal consumption in power supply, and rationally allocating and applying energy storage, and has made every effort to promote the company's circular economy industry chain to have a strong competitive advantage in the region and even the country. at the same time, the carbon reduction effect is more prominent. as thermal power units promote low-carbon transformation through biomass blending and green ammonia blending, the level of clean and efficient utilization of coal will be further improved. in addition, the proportion of green electricity in the aluminum industry continues to increase, and the green and low-carbon transformation of the circular economy industry chain has become more significant.

so far, the state power investment corporation of inner mongolia has built an industrial cluster in the huolin river region, including 1.8 million kilowatts of thermal power generation capacity that consumes 9 million tons of low-quality lignite annually, 1.05 million kilowatts of new energy generation capacity, 860,000 tons of electrolytic aluminum production capacity, and supporting self-provided power grids and monitoring and command centers. every year, 3 billion kilowatt-hours of green electricity is delivered to the downstream internal electrolytic aluminum industry. in the first half of this year, the proportion of green electricity consumption in electrolytic aluminum in the huolin river region reached 27.58%.created the world's first "coal-new energy-electricity-aluminum" circular economy paradigm。

in view of the successful experience of the huolin river circular economy demonstration project, the state power investment corporation of inner mongolia has replicated the "coal-electricity-aluminum" circular economy industrial chain in the baiyinhua area of ​​xilin gol league, which has similar resource conditions, relying on the existing 35 million tons of coal production capacity. it plans to build an 800,000-ton high-precision aluminum plate and strip project in two phases, and to build 5×350,000-kilowatt self-contained thermal power units and line delivery projects to extend the "coal-electricity-aluminum" industrial chain and strengthen, optimize and expand the industrial cluster. at present, the baiyinhua aluminum power project and 2×350,000-kilowatt self-contained thermal power units have been put into operation. in june this year, the baiyinhua self-contained power plant obtained the construction indicators of the 300mw wind power project for renewable energy substitution projects and the 50mw wind power project for full self-generation and self-use. it is planned to start construction within the year and connect to the grid for power generation in june 2025. after all the projects are put into operation, the installed capacity of new energy will reach 655mw, accounting for 48.3% of the total installed capacity of electricity. it can transmit 1.895 billion kwh of clean energy annually, increasing the proportion of clean energy electricity consumption of baiyinhua aluminum and electricity company to more than 30%, and the comprehensive utilization rate to 99.89%.

from production workshops to coal transportation corridors, from wind and solar industries to aluminum industries, the state power investment corporation of inner mongolia is surging with the enthusiasm of developing new quality productive forces.

at the wind turbine site in holingol, a tower-climbing robot with a camera and a paint sprayer on its head and shaped like a small tank is climbing up the wall of the wind turbine. a technician from the power company's d plant told reporters that this robot performs routine annual inspections such as testing, cleaning, grinding, and repainting the welds on the outer wall of the wind turbine tower. "previously, such inspections were mainly carried out by manual high-altitude operations, which were dangerous, inefficient, and costly. the wind power intelligent tower-climbing robot uses anti-fall backup safety protection and avoids high-altitude operations, fundamentally eliminating the safety hazards of manual high-altitude operation and maintenance."

in the coal transportation corridor, there are many factors causing failures due to the harsh operating environment, high dust content, and the presence of flammable gases, making accidents very easy to occur. at present, the inspection method of coal transportation corridors by thermal power companies is mainly manual inspection, which has problems such as high labor intensity, unstable inspection results, and blind spots. in order to reduce the labor intensity of operating personnel, improve inspection efficiency, and enhance the safety of coal transportation system operation, the state power investment corporation of inner mongolia huolinhe mine mouth power generation company, based on the characteristics of the coal transportation system with many points and a long front, gave priority to the implementation of the rail-mounted robot automated inspection system on the coal transportation sections ii and iii trestles. the systemuse advanced technologies such as artificial intelligence, cloud computing, big data, industrial internet, and 5g applications, realize 24-hour management and control of the coal transportation corridor, conduct scientific analysis of various detected data, and provide guarantee for the smooth operation of the coal transportation system.

actively carry out unmanned mine construction at coal mine production sites.unmanned driving technology has been applied on a regular basisin the first half of the year, the two affiliated minmetals mines have realized all-weather marshaling operation of 122 5g+ unmanned driving equipment, and completed a total of 3 million tons of coal transportation and 2.04 million cubic meters of stripping transportation, with an operating efficiency of about 90% of manned operations. it is planned that the scale of unmanned driving equipment will exceed 200 by the end of 2024, ranking second in the country, and the coal and rock transportation volume will reach more than 20 million cubic meters, with an engineering operation capacity of 50 million cubic meters.

at the aluminum ingot casting production site of huomei hongjun aluminum power company, the country's first aluminum ingot casting automated production line is running in an orderly and stable manner. the slagging, ingot casting, stacking, packaging, weighing and other links are all operated by robots.fully automated productionin addition, the company has also implemented intelligent manufacturing projects such as intelligent and precise aluminum production in electrolysis and intelligent safety inspection and alarm systems, effectively improving the automation and intelligence level of equipment. the construction of intelligent manufacturing has achieved phased results, and ultimately realized mechanized replacement of people, automated reduction of people, and intelligent unmanned operation, improving labor productivity and safety levels.

slag removal robot

on august 19, 2023, the country's first hybrid energy storage project consisting of three forms, iron-chromium liquid flow, flywheel, and lithium battery, was put into operation at the power branch of the state power investment corporation's inner mongolia company. the project includes flywheel energy storage, liquid-cooled lithium battery energy storage, and iron-chromium liquid flow battery energy storage projects, each with a capacity of 1mw. among them, the 1mw iron-chromium liquid flow battery energy storage project uses the "ronghe no. 1" battery stack independently developed by the state power investment corporation. it is the world's first megawatt-level iron-chromium liquid flow battery energy storage project, and further explores the application and adaptability of different forms of energy storage in the huolin river circular economy demonstration project, providing reliable decision-making basis and empirical data for the next large-scale introduction of energy storage projects, promoting the improvement of green electricity consumption capacity, and ensuring the stable operation of local power grids.

at the beginning of this year, the company completed the flexibility transformation of two 300,000-kilowatt and two 350,000-kilowatt thermal power units, which have the ability to deeply adjust the peak load to 20% of the rated load without oil injection, further improving the peak adjustment amplitude, climbing ability and start-stop speed of thermal power units, and transforming thermal power installed capacity from a main power source to a guarantee power source, playing a basic guarantee role of "wide load and stable frequency" in promoting the local consumption of new energy. under extreme conditions, nearly one million kilowatts of power generation space can be given to new energy every hour, and the three-mode hybrid energy storage demonstration project can be used for joint peak adjustment, basically achieving full consumption of 1.05 million kilowatts of new energy in the system, and achieving "zero abandonment" of wind and light resources.

at present, the state power investment corporation of inner mongoliaresearch on key technologies of multi-energy complementarity of "source-grid-load-storage-use"as a topic, we are making every effort to create an upgraded version of the circular economy in huolin river. in the future, we will vigorously promote the new paradigm of "coal-new energy-electricity-aluminum" joint venture and direct supply of source, grid, load and storage, help optimize my country's industrial layout and promote regional coordinated development.

next, the state power investment corporation of inner mongolia will accelerate the promotion of the 350,000-ton green aluminum project in zahannur, tongliao and the supporting 650,000-kilowatt wind power project to build the first "green aluminum" production line in china.leading the low-carbon transformation and upgrading of the aluminum industry chain from "coal-fired aluminum" to "green-fired aluminum"it is planned that by 2025, when the project reaches full production, the annual production capacity of electrolytic aluminum will reach 1.21 million tons, and the proportion of green electricity in electrolytic aluminum production will reach 40%. by 2026, the installed capacity of new energy in the circular economy of huolin river will reach 1.7 million kilowatts, and the proportion of green electricity will be further increased to 50%, and a new power system with new energy as the main body will be fully constructed.

in recent years, state power investment corporation of inner mongolia"building a green mining benchmark in my country's high-altitude and cold regions"with the goal of green mine governance, the government has made every effort to carry out mine ecological restoration work. since 2018, a total of 1.805 billion yuan has been invested, and 83,300 mu of mine ecological restoration has been completed. a total of more than 85,000 mu of forage grass has been sown, more than 140,000 trees and more than 17.14 million shrubs have been planted. the obvious results of green mine governance have been well received by all sectors of society.

specifically, the state power investment corporation of inner mongoliamain practiceshave: in order to overcome the limitations of natural factors to the greatest extent, improve the level of scientific management, and ensure the effectiveness of management, we follow the design concept of "open channels and dark cellars to create sponge-type spoil dumps; external discharge and internal storage to build an ecological open-pit mine" to create a "self-sustaining, maintenance-free" natural ecosystem; adopt the technical route of "engineering measures as a supplement and biological measures as the main", use engineering measures to consolidate the shape and biological measures to consolidate the foundation, repair the vegetation system, and maintain ecological balance; implement the six major restoration and management projects of "soil covering and shaping, water supply system, soil and water conservation, soil improvement, vegetation reconstruction, and irrigation system"; establish the ecological restoration goal of "building an artificial ecological mining area integrating forests, grass, and mines", and explore some effective management measures to solve the problems of ecological restoration in high-altitude and cold areas, and achieve good results.

"based on the actual conditions of the northern high-altitude and grassland ecologically fragile areas, we selected 16 species of forage grasses, 7 species of trees, and 12 species of shrubs, and adopted a combination of permanent and temporary technical measures to rebuild a community structure that can naturally succeed, basically forming a 'self-sustaining, maintenance-free' near-natural ecosystem." the relevant person in charge of ecological restoration at the state power investment corporation's inner mongolia company told reporters.

through governance, major ecological indicators have achieved leapfrog improvementsfor example, the vegetation coverage of the ecological restoration area of ​​the wukuang daojie dump under the state power investment corporation of inner mongolia has increased from 65% to 90%, an increase of 25%; the intensity of soil erosion has decreased from 4,049 tons/hectare·year to 3,443 tons/hectare·year, a decrease of 14.64%; the value of ecosystem services has increased from 24.2 million yuan/year to 48.3 million yuan/year, an increase of 21.4 million yuan/year.(china development and reform pressphoto/text by reporter cheng hui）