1. Project Introduction<o:p></o:p>

This project belongs to the field of consumer goods and civil engineering technology. Obtaining raw materials for road engineering and disposing of domestic waste are two major problems facing the construction and development of cities around the world. Waste incineration is currently the main reduction method adopted by countries around the world, but it also brings about the disposal of residues; the construction of road projects consumes a large amount of materials, and the acquisition of natural materials will cause huge damage to the environment. With the goal of sustainable development and in line with the principle of "waste-free city", the research team comprehensively considers the demand for solid waste resource disposal and road construction consumables, and focuses on slag beneficiation technology for the treatment and resource utilization of domestic waste incinerator slag. Focus on improving the quality of mining metals, road material characteristics and environmental characteristics of the processing and application of slag aggregates and their products, etc., and form the following innovative content:<o:p></o:p>

For the first time, a complete set of interrelated technical systems for the resource utilization of domestic waste incinerator slag has been established, from slag and sorting material treatment to road material application, which fully recovers the metal resources and mineral material resources in the slag and ensures the use of slag aggregates. Scientific, environmentally friendly and efficient utilization in road engineering has achieved effective connection between large-scale slag disposal and bulk road building materials.<o:p></o:p>

For the first time, slag was used as the target ore source to study the integrated application of typical ore separation technologies. A domestic non-ferrous metal separation technology based on the eddy current mechanism was developed, the viscous characteristics of the wet slag discharged from the incineration plant were studied, and a material separation technology based on air jet was proposed, which broke through domestic breakthroughs.5 mmSeparation of non-ferrous metals with minimum particle size, and the minimum separation particle size can reach2 mm, recovery rate from50%Increase the following to80%above. For the first time, recycled aluminum technology was applied to upgrade the quality of mineral processing aluminum waste, achieving high purity.97%For the above aluminum ingot products, it is proposed for the first time to apply ore separation scrap iron to the manufacture of iron sulfate products, and optimize relevant manufacturing process parameters; it is proposed to separate copper and aluminum based on the dense medium "dry process" represented by silica sand. technology.<o:p></o:p>

A complete set of technology for using slag aggregate as road materials was developed for the first time. The composition materials, performance characteristics and influencing factors of slag aggregate have been mastered, and the key control indicators and technical requirements for slag aggregate as road materials have been standardized. The mechanism and scope of application of slag aggregate in treating soft soil subgrade were discovered, the mechanism of slag aggregate in semi-rigid base mixture and asphalt mixture was revealed, and the material characteristics of slag wet precipitation sediment used as asphalt mixture fillers were clarified. A design method for stabilizing slag mixture and slag asphalt mixture with inorganic binders was established. It was the first to use slag aggregate in road subgrade and base layer in China, and passed long-term road performance evaluation. The technical reliability of slag aggregate as road materials was verified.<o:p></o:p>

The environmental impact of slag treatment was systematically studied for the first time. The environmental characteristics of rainwater runoff from slag piles are revealed, the environmental behaviors of process water and sedimentation tank sediment in the slag wet production process are analyzed, the impact of slag wet processing on the quality of soil and surface water around the site is clarified, and the mechanism of dust generation in the slag dry production process is discovered, and relevant treatment and disposal measures are proposed.<o:p></o:p>

After more than ten years of research, the project team established a new project in China for the first time.300tons/Tiantian's domestic waste incineration slag dry treatment production line; published academic monograph1Department, publishing research papers15Chapter (among themSCI、EIretrieval13Article); Obtained authorized invention patent3Item, utility model patent2Item; editor-in-chief of national standards1Ministry, Shanghai City Engineering Construction Standards1Ministry, Group Standards1Ministry. The research results have filled the domestic technological gap. Slag aggregate is used in many projects such as the Pudong Airport North Corridor, with good application results, realizing the resource treatment and application of domestic waste incinerator slag, and has significant economic, environmental and social benefits.<o:p></o:p>

2. Cooperation content<o:p></o:p>

(1) Brief introduction of the main relevant technologies involved<o:p></o:p>

(1) Domestic waste separation technology, ferrous metal separation technology based on magnetic separation, non-ferrous metal separation technology based on self-developed particle separators and eddy current separation, and a complete set of domestic waste incinerator slag dry method separation technology production line.<o:p></o:p>

(2) Road use technology of domestic waste incinerator slag, recycled aggregate of domestic waste incinerator slag, and a complete set of technical achievements for subgrade filling, base and surface layers.<o:p></o:p>

(3) Domestic waste incinerator slag sorting and metal recycling technology, including the purification of metallic aluminum, the purification of metallic iron, and recycled product technology.<o:p></o:p>

The research results have formed the national standard "Domestic Waste Incinerator Slag Aggregate"(GB/T 25032-2010), Shanghai City Engineering Construction Standard "Technical Regulations for the Application of Slag Aggregate from Domestic Waste Incinerators in Road Engineering"(DG/TJ 08-2245-2017), monograph "Theory and Practice of Resource Utilization of Domestic Waste Incinerator Slag".<o:p></o:p>

(2) Proposed cooperation areas and partners<o:p></o:p>

Domestic waste incinerator slag generation and application units in the Yangtze River Delta region.<o:p></o:p>

(3) Proposed cooperation model<o:p></o:p>

Talk face-to-face.<o:p></o:p>

3. Cooperation cases<o:p></o:p>

It cooperated with Shanghai Pudong New District Xingsheng Roadbed Materials Co., Ltd. to establish a special domestic waste resource treatment industrial base.<o:p></o:p>