First, the urgency and inevitability of China's industrial development to achieve circular economy

(A) disorderly competition antimony market, indiscriminate digging serious, national resources suffered huge losses

Antimony resources our country has unique conditions, coupled with the characteristics of antimony metal easily extracted, driven by market interests, the rapid increase in antimony smelters home to small-scale, low-level redundant construction way. The number of defective products manufacturers has grown from 14 in 1985 to nearly 400 now. There are many manufacturers and small scale. In 2001, there were only 13 actual output of more than 3,000 tons, accounting for only 3% of the manufacturers. Among them, Tin Mines Xingxing Industry Co., Ltd. is the first in the world, with the output of defective products reaching 22,157 tons, accounting for 42% of the national product output.

(2) Existing smelting technologies still have serious environmental problems

95% of China's smelting and smelting is fire smelting. In 2001, the products produced from the brittle sulphur lead bismuth ore accounted for 50% of the country's total output. However, the brittle bismuth bismuth ore was treated by the existing fire method, and the recovery rate of base metals was low, only 75%, and the comprehensive recycling was poor. The product grade is low, and there are two major environmental problems. 1 The low concentration (less than 3%) of sulfur dioxide is emitted to the atmosphere; 2 The arsenic slag is stored for disposal, and there are major safety hazards to environmental water pollution. At the same time, because most of the smelting refineries have a production scale of less than 1,000 tons/year, the comprehensive environmental management work has become more complicated and difficult.

Second, tin mines to carry out circular economy practice attempts

With the increasing awareness of environmental protection, China has paid more and more attention to environmental protection issues from the central government to the local government. The state has formulated more and more strict and operability of policy measures, so that smelting and smelting faces serious challenges of environmental protection, and the environmental awareness and sense of crisis of smelting enterprises are also increasing. Tin Mine Mine Star Industry Co., Ltd. is the world's largest manufacturer of defective products. Its production technology, economic and technical indicators, product output, specifications and product quality are at the international leading level or international advanced level. We will continue to study the treatment methods for a large amount of waste slag and waste gas generated during the smelting process, and find ways to solve the comprehensive utilization of solid waste resources.

(1) Carrying out comprehensive recycling of arsenic and alkali slag

In the process of smelting bismuth and zinc , a large amount of waste slag and waste gas are generated. For a long time, in smelting, the arsenic after arsenic oxidation is discharged as waste, which is called “arsenic slag”. After secondary treatment, it contains 4-10% of arsenic. Each 10,000 tons of refined sputum will produce 800 to 1000 tons of arsenic slag. Arsenic, commonly known as "arbitrage cream", is a drama drug, and it is necessary to build a special slag bank for proper storage. At present, the national arsenic slag storage has reached 50,000 tons, and will generate 0.5 to 10,000 tons per year.

Since the 1960s, Tin Mines Xingye Industry Co., Ltd. has been conducting research on the comprehensive recycling of arsenic and alkali slag. The research cost is nearly 10 million yuan. By 2003, it was obtained from rough refining and arsenic removal to arsenic slag treatment. A major breakthrough. After being approved by the relevant state departments, it has established a production line that processes 3,000 tons of arsenic slag per year. Even if the arsenic, antimony and alkali in the arsenic slag are comprehensively recycled, the environmental pollution of the arsenic slag can be solved.

The project started construction in July 2004 and was trial-produced in May 2005. In November 2005, the comprehensive recovery and treatment of arsenic and alkali slag was approved by the National Development and Reform Commission, the State Environmental Protection Administration and the China Nonferrous Metals Industry Association. It was officially put into operation in October 2006. The annual comprehensive utilization of arsenic slag can reach 1200 tons. The annual recovery of 185 tons of arsenic slag and 163 tons of metal bismuth not only digested the newly produced arsenic slag in the tin mine, but also processed the original accumulation. 600 tons of arsenic slag. In the process of treating arsenic slag, the amount of base metal recovered can be recovered 350 tons per year, at the current market price of 8 million yuan. The arsenate produced by evaporation and concentration can be used as a clarifying agent for glass enterprises, and the alkali-containing mother liquor is used in chemical industry. The factory recycles and rapidly removes arsenic and selenium removal agent for arsenic removal operation, no secondary pollution, and makes the best use of it, without waste. It has the characteristics of large investment, obvious environmental benefits and outstanding demonstration significance of circular economy. The implementation of these projects not only reduces environmental pollution, but also increases the company's annual benefits by more than 20 million yuan.

(II) Actively utilizing “three wastes” to save energy and reduce emissions

Strontium smelting produces a large amount of low-concentration sulphur dioxide, which is costly to process and technically difficult. The tin mine has invested more than 2 million yuan and adopts the cyclone tower wet desulfurization and dedusting technology. The treated sulfur dioxide emissions are lower than the national standard. The recovered material, calcium sulphate, is used as raw material in the company's subsidiary cement plant to completely solve the problem. A problem that plagued the company.

Company chemical plant boilers, boiler over the past year with 16,000 tons of coal, spending more than 500 million. The zinc plant produces 40,000 tons of refined zinc per year. At the same time, it has to produce more than 40,000 tons of vertical tank slag. It used to sell slag to others at a price of several tens of yuan per ton. The company invested more than 10 million yuan to renovate the coal-fired boilers in the chemical plant, recycle the carbon heating energy from the vertical slag of the zinc plant, and replace the coal with slag. The secondary slag can be used as a raw material for cement industry raw materials and downstream enterprises to further extract valuable metals such as zinc. The project was completed in August 2007 and will increase the company's annual profit by 3 million yuan.

During the coking process of zinc smelting, the temperature of coke-exhaust gas has reached more than 800 degrees. Since the zinc plant was put into production, it has been emptied. The company put into operation more than 14 million yuan and built a power station with an installed capacity of 3,000 kW. The annual power generation capacity is 2.36 million. In kWh, power generation began in May 2007, reducing the original process power consumption by 700,000 kWh and saving 100,000 tons of water, which can completely eliminate the sewage discharge from the cooling tower and increase the benefit by 7.3 million yuan.

Third, the development of China's industrial and industrial circular economy countermeasures

(1) Vigorously promote the clean production of industrial waste

1 To strengthen the awareness of cleaner production. It is necessary to correctly understand the role of cleaner production in the sustainable development of China's sputum industry, correctly understand the relationship between cleaner production and the economic benefits of enterprises, and make enterprises consciously and cleanly produce policies; 2 to strengthen the development and application of new smelting technologies. It is necessary to strengthen technological transformation, so that arsenic, antimony and alkali in arsenic slag can be comprehensively recycled and solved, and the environmental pollution of arsenic and alkali slag should be solved; 3 clean production legislation should be improved, and corresponding development regulations or regulations for smelting industry should be established. To create conditions for the healthy development of China's smelting and refining industry. At present, it is necessary to formulate a law that promotes the development of circular economy with the overall nature and the nature of the basic law, namely the Circular Economy Promotion Law, which clarifies the rights and obligations of governments at all levels and their management departments to develop circular economy, and clarifies the whole society. The way and direction of developing a circular economy, using the government's "tangible hand" and the "invisible hand" of the market mechanism, regulate the development of circular economy from the national development strategy, planning and decision-making levels.

(2) Establishing a circular industrial industrial park

There are many intersections and connections between people's lives and other industries in terms of products, resource supply, and pollutant treatment. With the advancement of contemporary science and technology, especially the multi-disciplinary comprehensive characteristics have been developed in the long run, this industry has mutual Coordinated development and the construction of an industrial ecological park have become an inevitable trend of development. The 锑 ring-type industrial eco-industrial park is based on the smelting and refining plant as the core enterprise, and other related industries are the upstream and downstream supporting industries of the industrial chain network, designing the cyclical metabolic processes of materials, energy, water, wastewater, solid waste, etc., from a regional perspective. Resources and energy, rational layout, to ensure the intensive use of materials, energy and resources in the region. It is necessary to actively use administrative means to promote the construction of industrial parks, strengthen planning, strengthen supervision, maintain fairness, strive for quotas, and create an environment. For related enterprises entering the industrial park, support should be given from the aspects of taxation, financing, and technological progress.

(3) Increase investment in scientific research and pay attention to the application research of cockroaches

Vigorously develop the circular economy, we must strengthen the research on the low-energy, high-recovery, non-polluting and low-cost process methods for mining, selection and smelting, especially the selection and smelting technology of complex antimony ore. It is necessary to strengthen the comprehensive recovery research of waste gas, waste residue and waste water, such as the recovery of sulfur in waste gas, the comprehensive recycling of arsenic alkali residue, and the research of blast furnace slag glass ceramics.

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