located in Handan City, Hebei Province, construction waste is transformed into colorful ecological environmental protection bricks after about 30 minutes of crushing, screening, batching, pressing and maintenance.
"This is a new project put into operation by the company, with an annual disposal of about 2 million tons of construction waste.". Ecological bricks are widely used in water conservancy, transportation, urban renewal and other fields, and the current market demand is strong. Tian Haikui, chairman of Xinfeng Company, said that in recent years, through continuous technological innovation, the company has promoted the harmless disposal and comprehensive utilization of construction waste, domestic waste and other wastes, and has found a unique way of circular economy. In 2023, the company achieved an output value of 5.6 billion yuan and a profit of 400 million yuan, an increase of 5.6% and 3.1% respectively over the previous year.
Exploring resource utilization
into the raw material greenhouse of Xinfeng Company's industrial solid waste disposal plant, the large reclaimer waved its "arm" and sent the steel slag into the silo continuously. The steel slag is changed into steel slag powder through the processes of crushing, grinding and the like by a grinding machine, and the steel slag powder becomes a raw material required by the low-carbon cementing material.
"The biggest contributor to the production line of this industrial solid waste comprehensive utilization project is the steel slag vertical mill with a diameter of 6.3 meters, which integrates crushing, grinding, drying and powder selection, and can realize the large-scale disposal of steel slag and slag.". By adjusting the equipment parameters, the required grinding fineness can be obtained. Li Junwei, deputy general manager of Xinfeng Company, introduced. Handan,
where Xinfeng Company is located, is an industrial city. Every year, in the process of steel and coal production, a large number of steel slag, slag, fly ash, coal gangue and other wastes are produced. How to make good use of these wastes and make them play a greater role? Xinfeng Company has set up a technology research and development center, and cooperated with scientific research institutions to explore different kinds of waste treatment methods in one experiment after another, to build a high-efficiency waste resource recycling platform, and gradually build a perfect circular economy chain.
From the completion of the first new dry process cement clinker production line in 2006 to the commissioning of the ecological brick production line made of urban construction waste in 2023, Xinfeng Company has continuously expanded its industrial chain and completed nine circular economy projects. Among them, the company's technicians have worked hard to tackle key problems in production practice, using industrial solid wastes such as steel slag powder and fly ash as the main raw materials, and independently developed a new type of building material, low-carbon cementitious material, by optimizing the proportion and exerting the synergistic utilization effect of multiple solid wastes. "This new material can replace cement for concrete production and has a wide range of applications, becoming a new growth point for the company." Li Junwei said.
Aiming at the needs of urban renewal and new rural construction, Xinfeng Company has broken away from the traditional utilization modes of steel slag, slag and fly ash, increased technological innovation, and developed high value-added solid waste resource utilization products. For example, on the basis of producing recycled aggregate, recycled sand, recycled micro-powder and other materials by crushing and screening construction waste, the company extends the industrial chain to produce green building materials such as recycled bricks, blocks and imitation stones. According to market demand, the company subdivides them into more than ten kinds of recycled bricks, such as blind road bricks, slope protection bricks, hollow bricks, floor tiles and roadside stones, and the utilization rate of construction waste resources reaches 100%. In February
this year, Xinfeng Company invested in the construction of "steel slag, tailings, coal gangue preparation of environmental protection ecological wall and floor tiles project". "The project uses advanced equipment and advanced dry ceramic production technology, using steel slag, tailings, coal gangue and other raw materials, can produce permeable bricks, roadside stones, paving stones, landscape bricks and other products.". Compared with traditional ceramic products, the cost is reduced by 20% to 30%, and the annual output value is expected to reach 15 billion yuan. Li Junwei said.
At present, Xinfeng Company has formed an annual capacity of absorbing 15 million tons of various industrial solid wastes such as smelting waste and iron tailings from iron and steel enterprises, fly ash from power plants, slag, desulfurization gypsum, etc. At the same time, it disposes of 2 million tons of construction waste annually, and can produce more than 8 million square meters of ecological bricks. It has found a new way in the deep development and utilization of waste. In the factory area
of Xinfeng Company, there are sanitation trucks shuttling among them from time to time. "Through scientific and technological innovation, we dispose of domestic waste harmlessly and turn it into production resources." Guo Jianqiang, deputy general manager of Xinfeng Company, told reporters.
Domestic waste disposal has been a difficult problem for urban and rural environmental protection and development. How to turn domestic waste into treasure? In the absence of experience to draw lessons from, Xinfeng Company has formed technical alliances with Tsinghua University, Chengdu Institute of Industrial Design of Building Materials and other institutions of higher learning and scientific research institutes to jointly tackle key problems.
Through repeated tests and technical deduction, Xinfeng Company invested about 250 million yuan to build an integrated disposal project of urban and rural domestic waste. "After the domestic waste entering the plant is screened in the pretreatment center, the oversize is used as the fuel for cement production, and the undersize replaces part of the raw materials for cement clinker production and enters the cement rotary kiln for high temperature harmless disposal." Wang Long, a process engineer at the technical center of Xinfeng Company, said that the incineration temperature of the domestic waste disposal device was high, and the combustion temperature in the cement kiln was as high as 1400 to 1800 C. The harmful components in the waste were completely incinerated by high temperature, and most of the volatile heavy metal elements were solidified in the cement clinker without forming ash and fly ash. Realize pollution-free and zero-waste garbage disposal.
Xinfeng Company constantly summarizes in practice, combines the garbage collection, storage and transportation system with the emerging treatment technology, and opens up the whole chain of domestic garbage from recycling to treatment. At present, the company's daily disposal capacity of domestic waste is more than 1000 tons.
"Not only construction waste and domestic waste, but also hazardous waste and medical waste have been disposed of harmlessly." Guo Jianqiang said, "The company disposes of more than 100000 tons of hazardous wastes annually."
In recent years, aiming at the frontier of scientific research, Xinfeng Company has actively developed advanced production equipment and production technology, made new breakthroughs in harmless disposal and comprehensive utilization of resources, and obtained 69 new technology patents and invention patents, relying on the mode of government-industry-university-research and integration, and in close cooperation with many scientific research institutes. "These innovative achievements have been applied to make efficient use of waste, which not only promotes the development of enterprises, but also beautifies the environment.". The company was awarded the title of "Green Factory" by the Ministry of Industry and Information Technology. Guo Jianqiang said. While
promoting digital operation
in the continuous extension of the industrial chain, Xinfeng Company actively plans and promotes information construction and digital operation. The company promotes the full integration of production methods, products, services and industries, promotes the digitalization of material procurement, human resources, business analysis, information security and administrative office, and realizes the full scene of online business. In terms of
production, Xinfeng Company has built an intelligent environmental protection system, invested 140 million yuan to implement SCR (Selective Catalytic Reduction Technology) flue gas denitrification project, and realized the recycling of waste heat, dust, pressure and gas under the digital control of the whole process. In terms of
management, Xinfeng Company has invested nearly 100 million yuan to build an intelligent management platform, which realizes digital visual management and control from raw materials entering the factory to finished products leaving the factory. Steel, the chief supervisor of digital operation of Xinfeng Company, told reporters that with the development and growth of the company, the total amount of materials and shipments per day is about 1000 vehicles. Previously, the whole process took 50 minutes at the fastest, because all the links involved in the driver's delivery of goods, such as queuing into the factory, checking certificates, issuing weighing bills and invoices, required manual operation. Therefore, trucks often queue up, sometimes even 5 kilometers away, which not only affects road traffic conditions, but also brings potential safety hazards. "Now, through the intelligent management platform, drivers only need to download APP with their mobile phones, make appointments, receive orders, queue up, enter the factory, weigh, etc. According to the process, they can basically achieve immediate unloading, immediate loading, and the whole time of entering and leaving the factory does not exceed 20 minutes, which greatly improves the efficiency." Guan Gang said. In terms of
service, Xinfeng Company has built the industrial platform of Qingfeng Mall to realize the seamless digital connection of the whole scene of transaction, logistics, procurement and freight services. Through online transaction, online customer relationship management and online marketing process management, the operational efficiency and revenue of customers are improved. In the future, the company's online trading platform and logistics platform will carry more diversified service scenarios, and jointly explore the construction of industrial digital ecology through in-depth cooperation with upstream and downstream partners.
"In order to achieve long-term development, the company needs to pursue the unity of economic and social benefits and the organic combination of short-term and social benefits by optimizing the mode and deepening management." Tian Haikui said that through the construction of circular economy industrial park, waste can be effectively utilized, which will always be the company's development goal.
