In recent years, the scale of China's renewable non-ferrous metal industry has developed rapidly, and it has been ranked first in the world for many years.The output of renewable non-ferrous metals keeps increasing, the industrial status keeps improving, and the overall technical level has made great progress.Renewable metals are featured by green, recycling, energy saving and consumption reduction.With the development of ecological civilization and beautiful China, the development of renewable non-ferrous metal industry has been endowed with more responsibilities of The Times.

On July 26, be in suzhou renewable metal design and research institute opening ceremony, renewable non-ferrous metals experts and scholars on China's renewable non-ferrous metal technology present situation and development trend, the professional design agency power industry transformation and upgrading, aluminium scrap recycling industry present situation and the recovery technology development and optimization of secondary aluminum smelting equipment, made the report, and the industry hot topic has carried on the detailed analysis and prediction.

Technological innovation drives green development

At present, the technical equipment level and environmental protection management level of domestic renewable non-ferrous metal industry have been greatly improved thanks to the increasingly strict requirements of national environmental protection and the proposal of green development concept.Advanced technical equipment such as full automatic crushing and separation, melting of melting pool, heat storage combustion, flue gas secondary combustion and oxygen-enriched bottom blowing are widely used in the industry and have achieved positive results.The average energy consumption level of renewable copper is close to 250 kg of standard coal/ton, the average energy consumption level of renewable lead is close to 130 kg of standard coal/ton, and the average energy consumption level of advanced renewable aluminum enterprises can reach 80 kg of standard coal/ton. The results of energy saving and consumption reduction are remarkable.

Green and intelligent are the main directions of China's manufacturing transformation.The non-ferrous metal recycling enterprises are accelerating the modernization, automation and intellectualization of technical equipment, improving the scientific and fine level of sorting and processing, promoting the green development of the industry, and strengthening the research and application of green manufacturing complete sets of equipment for non-ferrous metal recycling.In the aspect of raw material pretreatment, there is great potential for development of complete equipment for sorting, removing miscellaneous and complex mixed waste metal scraps as well as complete equipment for cable treatment with stable and efficient technical performance.In terms of fire smelting equipment, green is mainly reflected in the smelting equipment of low-grade waste copper and the comprehensive recycling and utilization equipment of aluminum ash residue.Wet process is mainly reflected in the recycled lead, new energy battery and circuit board complete wet process equipment.

In terms of green manufacturing technology and intelligent control, regeneration metal branch of China nonferrous metals industry association deputy secretary-general opportunities said: "at present, the process design of renewable non-ferrous metal industry basically adopts the technology of the traditional ideas, the lack of creativity, only attach importance to basic metal recycling, ignoring the comprehensive recycling of rare metal.Intelligent key processes and intelligent optimization control of production process can be realized in the production of renewable non-ferrous metals. High temperature, danger, corrosivity and other jobs can be replaced by robots, which not only improves production efficiency, but also greatly improves safety.The renewable non-ferrous metal industry should pay more attention to the formation of green production mode, unswervingly follow the path of green and low-carbon development, build a green industrial system, and promote the construction of ecological civilization to a new level.

With the improvement of social consumption level and the enhancement of people's awareness of environmental protection, the demand for high-end and environmental protection products in the consumer sector has increased, which is an important opportunity for the development of renewable non-ferrous metal industry.The research and development of new materials and the manufacture of green products are becoming more and more important. New alloy materials and green environmental products will be given priority. In particular, there will be great market and promotion prospects for the research and development of such technical products as the recycling of cans, the production of green copper alloys by waste brass and new energy batteries.

Energy conservation is a systematic project for the renewable non-ferrous metal industry."The management of dioxins is an important topic of the smoke management technology in this industry, and it is also the top priority of the smoke management technology.The research, development and design of high-efficiency energy-saving and environmental protection technologies and equipment for the regeneration of non-ferrous metals of different varieties, raw materials and production scales should pay attention to the production process of energy saving, equipment manufacturing of energy saving and utilization of waste heat.Opportunities said.In addition, the problem of high operating cost of environmental protection equipment is widely concerned by the industry. The research and development of environmental protection complete sets of equipment with low operating cost is also a hot spot in the field of environmental protection in the future, and will be promoted and applied in large and medium-sized renewable non-ferrous metal enterprises.

Professional design helps with transformation and upgrading

Compared with the production of primary mineral metals, domestic production of copper and aluminum recycled metals is still relatively low, and there is a certain gap with developed countries.The regeneration non-ferrous metals enterprises in China are in a small scale, quantity and extensive management loose, is also facing backward technology and equipment task, innovation ability weak, low product added value and the shortage of the capacity building of environmental protection of enterprise common problems, and lack of scientific and comprehensive guidance, not professional, standardization of design research institutions can play a role to guide and improve the development of industry.

"Overall, in the stability of pretreatment equipment performance, production efficiency, processing quality, energy consumption, processing cost, environment protection, metal smelting equipment recovery, operating environment, green products and high value product development as well as specialized is engaged in the design of the regenerative metal technology development, planning, environmental protection equipment manufacturing organization and so on, renewable non-ferrous metal industry in China and the world advanced level there is still a gap."Opportunities said.

Renewable non-ferrous metal industry is an emerging industry in China, have already enacted aluminium and aluminium alloy waste materials and other raw material standard, the product of secondary lead and lead alloy ingot standard standard, the regeneration of copper, aluminum, lead, zinc industrial pollutants emission standards, environmental standards, energy consumption per unit product energy consumption limits "of the secondary lead standards and specifications for design of secondary copper smelter technology standards and specifications, such as in energy conservation and environmental protection, transformation and upgrading the industry achieved good results.The industrial standards, such as the specification for the license of renewable copper, aluminum, lead and zinc pollution discharge, and the specification for the process design of renewable aluminum processing plants, are being drafted and improved. However, it is far from enough for the growing renewable non-ferrous metal industry, and the overall technical standard system needs to be improved.

With the transformation of Chinese manufacturing from big to strong, the demand for low-end non-ferrous metal materials will gradually decline, and the demand for high-end materials will continue to increase. Sustainable development and green manufacturing are key strategic directions.This also puts forward higher requirements for the development of renewable non-ferrous metal industry.The establishment of a research institute for regenerative metal design is an urgent need to enhance industrial innovation capacity and speed up transformation and upgrading.Professional renewable metal design research institutions, should be studied with engineering design, materials and equipment, equipment manufacturing and other aspects of the comprehensive advantages of resources, focus on the policies of renewable non-ferrous metal industry research, project consulting, engineering design, technology research and development (including research and development of technology and equipment technology research and development) content, provide policy and industry and so on a macro level of consulting, project feasibility study, preliminary design, engineering design, engineering general contracting, subject and form a complete set of equipment, environmental disposal, improve the development of new technology and other technical services.It can not only provide comprehensive guidance and specific implementation plans, but also promote advanced technology and management mode, strengthen communication and cooperation within the industry, help enterprises to avoid detours, effectively solve problems encountered in the development process, and comprehensively improve the professional design level and technology research and development capacity of China's renewable metal industry.

The establishment of suzhou regenerative metal design research institute, the first domestic regenerative metal design research institute, fills this gap.Peng-hui li, director of the hospital craft room introduction: "the establishment of the suzhou renewable metal design and research institute to fundamentally guaranteed renewable non-ferrous metal construction technology, equipment, technical level and the level of pollution prevention, power of renewable non-ferrous metal industry standards formulated, tackling a problem technology and equipment, for the enterprise production equipment, process, pollution prevention, such as the provision of professional solutions as a whole.We will reduce the risks and costs of industrial transformation, achieve industrial transformation and upgrading as soon as possible, and promote green, clean, low-carbon and circular industrial development.

The prospect of recycling spent aluminum is available

In the context of the country's continuous restriction of electrolytic aluminum production capacity and bauxite mineral as non-renewable resources, the renewable aluminum industry as a representative of green and circular economy is being paid more and more attention.The energy needed to produce a tonne of recycled aluminum is only about 5 per cent of the raw material.At the same time, it can reduce carbon dioxide by 0.8 tons, remove surface soil by 0.6 tons, and extract ore by 6.1 tons.The pollutant discharged in the process of regenerated aluminum production is only equal to 10% of that produced in the whole process of primary aluminum production.

Renewable aluminum has become an integral part of the development of aluminum industry in the United States, Brazil and other countries due to low energy consumption, high recycling rate, strong regeneration and low environmental damage.In 2014, 22.9 billion cans were recycled in Brazil, with a recovery rate of 98.4%.The industry has created $230 million and thousands of jobs, saving electricity for 6.6 million people a year.

"Since 2004, China's aluminum products have been increasing rapidly year by year, especially the increase of profile and strip," said du kang, PhD.According to the statistics of the European aluminum association, the aluminum cycle for packaging is less than 2 years, that for automobile is 7~20 years, that for engineering products is 20~40 years and that for construction products is 15~50 years.Accordingly, our country will usher in automobile, traffic use aluminium, industry use aluminium recycling high tide."

In 2016, China produced 6.3 million tons of recycled aluminum, accounting for 16.5 percent of all aluminum output.China is the world's largest producer of recycled aluminum, but accounts for a relatively low total aluminum production.At present, most of the domestic aluminum recycling enterprises are still in the phase of scrap aluminum degradation, that is, the recycled consumer waste of deformed aluminum alloy is cast into the casting aluminum alloy with lower processing fee, which lacks the same level of recycling technology and the design concept of recycled aluminum alloy.Du kang predicted: "in the future, the technological process and equipment manufacturing of recycled aluminum will be more and more perfect and advanced, and the optimized design of recycled alloy components will be further developed.New boride removal and Mc-de-ironing technologies will be widely used in aluminum water removal.

How to effectively achieve rapid, accurate, low cost, continuous efficiently will be the aluminum material separation from waste aluminum materials, at the same time as possible to achieve different detailed classification of aluminum alloy material, improve the performance of the regeneration process of waste aluminum process to obtain chemical composition meet the requirements, have good organization form of high quality aluminium products, will be focus on the direction of the future.

Yu guangsheng, head of the technology development department of suzhou xinchang solar energy technology co., LTD., said: "" it is imperative to establish a complete recycling, transportation, treatment and utilization system for used goods.At present, there is no scientific recycling system in China, and the degree of resource enrichment is low.The separation and treatment of waste aluminum materials directly affects the quality of subsequent products, and is also the key to achieve the protection and utilization of waste aluminum materials.At present, dry method, wet method and mechanical grinding method are mainly used to remove the surface paint film at home and abroad.The process research and technology innovation of pretreatment should aim at "not producing new pollution, but not damaging inner aluminum alloy and improving the yield of aluminum alloy".

Li penghui thinks: "in 2020, China's renewable aluminum output is predicted to be 8.25 million tons, and the annual growth rate of renewable aluminum output is predicted to be 7%.China's renewable aluminum enterprises will still face numerous opportunities and challenges in the future. The industry will be eliminated and integrated at a faster pace. There will be no significant increase in the growth rate of renewable aluminum production.In the medium and long term, as an important part of the circular economy, the recycled aluminum industry has a lot of room for market development.