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In 2021, the output of bulk industrial solid waste exceeded that of 2014 and reached a peak. Influenced by such factors as the introduction of environmental protection policies, slowing economic growth, accelerating the transformation of old and new production capacity, deepening adjustment of industrial structure, and intensifying source reduction, the value reached its lowest level in 2018, and has shown a steady upward trend since 2019. In 2021, the output of bulk industrial solid waste is about 4.038 billion tons, an increase of 251 million tons compared with 2020, with a year-on-year increase of 6.6%. Tailings lead the way, reaching 9.6%, coal gangue, fly ash, red mud and industrial by-product gypsum increase slightly, and metallurgical slag drops slightly. About 3.2 billion tons of construction waste is produced.

2021 all types of bulk solid waste

Production, utilization (tons) and utilization (%)

In 2021, the comprehensive utilization of solid waste in bulk industries reached 232,800 tons, an increase of 8% year on year, and the comprehensive utilization rate of 57.65%, an increase of 0.74 percentage points, among which the comprehensive utilization rate of solid waste such as coal gangue, fly ash and tailings topped the list. From the perspective of application field, the main use of bulk industrial solid waste is still used as building materials in the downstream construction market, in addition to the rapid development of mine filling.

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However, in the present comprehensive utilization way, the capital value of bulk industrial solid waste has obviously not received due attention. Comprehensive utilization of industrial solid waste can effectively replace the primary mineral resources and reduce the excessive development of mineral resources. However, the degree of research, analysis and investment in the field is low in our country, and the substitution value of industrial solid waste for mineral resources is far underestimated! Such as tailings, waste rock, construction waste, coal gangue and so on instead of sand aggregate; Steel slag is used as asphalt concrete aggregate instead of basalt, the added value of comprehensive utilization is low.

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Construction waste is the solid waste generated in the process of building construction, reconstruction, expansion or demolition. According to the different sources of construction waste, it can be divided into construction waste, demolition construction waste, decorative waste. It is estimated that the total stock of construction waste in China exceeds 20 billion tons, accounting for at least one third of the total amount of municipal solid waste, which is the largest and most concentrated solid waste discharged by a single variety in Chinese cities.

How to reasonably and high-quality construction "waste" into "raw materials", "construction waste treatment professional demand generation", "where to come from, back to where to go", "waste treatment" further change the "production capacity" and other issues, caused in-depth research by relevant professionals.

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At present, after sorting, eliminating or crushing, most of the waste in construction waste can be reused as renewable resources. The recycled aggregate of construction waste can replace sand and be used as intermediate products for the preparation of masonry mortar, plastering mortar, concrete cushion blocks, paving bricks, lattice bricks and other terminal building materials, which is the main way for the utilization of construction waste resources.

Winsun is 3D printing "ink" technology can transform all kinds of solid waste into cementing materials instead of cement. Various types of solid waste are researched and disposed into as many as 156 kinds of 3D printing digital new materials, whose performance can be increased from conventional C30 to C150, which can meet the performance requirements of various application scenarios. This technology provides innovative ideas for high value-added comprehensive utilization of solid waste in industrial, construction and other fields.

First of all, solid waste will be transformed into "ink" materials for 3D printing of buildings. Then, relying on the 3D printing digital mobile factory of Winsun Architecture, buildings and Yingheng stone building materials will be printed locally and used in urban renewal, agriculture and rural areas, new infrastructure and other fields, such as 3D printing nucleic acid testing house, urban landscape sketch, cultural tourism and art structures, sound barrier and other municipal facilities. The added value of solid waste increases exponentially!

Building 3D printing digital technology can not only "eat dry and extract all" industrial solid waste, construction waste and mine tailings, and transform solid waste into trillions of output value of the construction industry, but also enable the digitalization of local iron and steel, mining plants and construction industries. At the same time, it can also achieve the goal of energy conservation, carbon reduction, resource regeneration and environmental improvement. To achieve the goal of two mountains and two carbon, promote the transformation of full digital architecture contribution.