Some time ago, the relevant media revealed that Yunnan Luliang Chemical Industry Co., Ltd. illegally dumped chromium slag contamination incidents and was very shocked in related industries. Wang Peilin, deputy secretary-general of the China Inorganic Salt Industry Association, said in an interview on September 19 that he will urge the relevant companies to strengthen management and self-discipline on the basis of clarifying the status of chromium salts enterprises, promote the treatment of chromium slag pollution through scientific and technological innovation, and undertake society. responsibility.
It is understood that at the end of August, the China Inorganic Salt Industry Association urgently convened an emergency working meeting of the manager of the chrome industry plant manager. Petrochemical Department of National Development and Reform Commission, Industry Development Department of China Petroleum and Chemical Industry Federation, and Ministry of Quality and Safety Environmental Protection and China Inorganic Salt Industry Association attended the meeting. There are currently 14 chromium salt (red sodium) production companies in China, and 13 corporate managers are present.
At the meeting, Xu Jiangen, chairman of Yunnan Luliang Chemical Industry Co., Ltd., made a profound review of the company's chromium residue contamination incident and said that he would learn lessons and make serious corrections. The enterprises reported the disposal of chromium residue left over from history and the disposal of chromium residue produced during the year. The delegates agreed that strengthening the management of the company should not stop on the face and mouth. It should be implemented in the daily work, strictly follow rules and regulations, standardize the operation procedures, strengthen supervision and management, and staff training posts. Qualifications and production processes must not be relaxed and slack. What is more important is that enterprises must strengthen self-discipline, self-discipline, and take social responsibility. The meeting put forward requirements for companies that have not completed the task of resolving the remaining chromium slag, and must complete the task of governance within the time limit; require the company to accept the supervision of the media and the public and do its job well.
According to the information provided by China Inorganic Salt Industry Association, China's chromium salt industry has a production capacity of 330,000 tons/year and an annual output of 272,800 tons. There are 14 start-up companies throughout the year, mainly in the central and western regions of China. In recent years, chromium salt production companies have had many problems left over from history due to corporate restructuring, mergers, and other issues. In order to support chromium salt companies to solve difficult problems and achieve healthy development, relevant state departments have allocated special funds to support them. Many companies have also raised funds for the harmless treatment and comprehensive utilization of chromium residues. The relevant departments, research institutes and chromium salt manufacturers of Chinese Academy of Sciences For many years, it has been committed to the development of technology for harmless treatment and comprehensive utilization of chromium slag. Since its establishment in 2003, the China Inorganic Salt Industry Association has held several special meetings, inviting domestic and foreign experts to introduce the world’s advanced production of chromium salts, and guiding enterprises to solve the problem of chromium slag pollution in the production process, harmless to chromium residues. Processing and comprehensive utilization.
According to experts, currently the world's most advanced production technology for chromium salt production mainly adopts calcium-free roasting method. Dolomite and limestone are eliminated from the batching, which reduces the discharge of chromium-containing waste slag, makes the disposal of waste slag easier, and reduces processing. cost. In order to reduce the environmental pollution caused by the production of chromium salts, the production of chromium salts in the United States, Japan, Russia, and other countries has grown toward the direction of concentration and large-scale development, which is conducive to environmental governance and will help improve the economic efficiency and market competitiveness of enterprises. The domestic chromium salt industry should draw lessons from their successful experience.
It is understood that domestic companies have done a lot of work in the development and promotion of new technologies, new processes, and new equipment for chromium salts. The self-developed 10,000-ton calcium-free roasting device has been operating in balance for four consecutive years, and the introduction of calcium-free roasting technology equipment has been operating normally. The 10000-ton potassium sub-molten salt liquid-phase oxidation apparatus with independent intellectual property rights has achieved the desired technical and economic indicators. The chrome iron powder alkali oxidation method developed by Tianjin Pesson Company produces chromite salt co-production iron oxide process 3000 tons/year Pilot plant passed the scientific and technological appraisal of the petrochemical association, and the pneumatic fluidized tower type developed by Chongqing Changyuan Company Continuous pressurised liquid-phase oxidation of 5,000 tons of sodium chromate/year pilot plant passed the petrochemical federation pilot test technology appraisal. In addition, an oxygen-enriched roasting process developed by Sichuan Jinyang Jianhua Group to produce sodium chromate and a carbon dioxide carbonation process to replace the sulfuric acid acidification process to produce sodium dichromate 1000 tons/year pilot plant passed the appraisal of Sichuan Science and Technology Department in 2010.
The Inorganic Salt Association recommends that related companies strengthen research management and self-discipline while accelerating scientific research investment, actively develop harmless chromium residue treatment and comprehensive utilization technologies, and carry out harmless treatment and comprehensive utilization of the remaining chromium residue in strict accordance with relevant state regulations. . Strict implementation of the "Crodide production and construction management permit", in accordance with national development planning requirements, the use of advanced, clean production technology, promote recycling economy and sustainable development model. Develop series of products to achieve deep processing, reduce material consumption and energy consumption, and finally form an industrial chain and a series of large-scale production bases.
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