Bad impressions do not come out of thin air. The “11·13†Jilin Petrochemical double-benzene plant explosion that has just occurred polluted the Songhua River, causing Harbin City, which has a population of more than 3 million people, to stop water for 4 days. It can be said that the impact on society is huge. There were more than a year ago in the chlorine leakage and explosion accident in Tianyuan, Chongqing and the Huai'an liquid chlorine leakage accident occurred in Huai'an this year. All these accidents have resulted in casualties, environmental pollution and large-scale evacuation, which will make people never forget. However, in recent years, the chemical industry has made great contributions to the comprehensive utilization of 'three wastes' and pollution control. A batch of batches of already mature technology that can ensure clean production have emerged continuously, such as alkali slag treatment, sulfur dioxide treatment, refinery wastewater reuse technology, etc., even the chromium slag pollution that has always been recognized as a major environmental protection has Governance techniques. These are the real contributions of people in the chemical industry to the entire society. Although none of them received environmental awards, they are still green heroes.
Of course, we also have to admit that despite the efforts made by the chemical industry, environmental protection is still the biggest language of the chemical industry to the community. Indeed, there are still many chemical companies that have lax management, loosened their responsibilities, and even caused pollution accidents, causing harm to the surrounding people. Therefore, chemical companies must do a good job with a high degree of social responsibility and redouble their efforts to ensure the environmental protection and safety of chemical production.
Changing your image depends on your own efforts. I hope that chemical companies can put more energy into environmental governance and create excellent clean production performance. If one year's 'Green China Person of the Year' emerges from the chemical industry, it shows that the chemical industry has changed and the public's reputation has changed.
In the investment casting industry, steel castings are the most used castings in the manufacturing industry, and are widely used in equipment, agricultural machinery, machining, and automobile industries. Metal castings can produce parts with complex shapes, but there are also requirements for the design of the product structure. In the case of meeting the requirements of use, it should also try to comply with the casting process. For example, in the structural design, care should be taken not to have thin walls, which may easily lead to dissatisfaction with pouring or product deformation; for example, try not to have sharp corners, try to use radian transitions; and try not to appear small and deep blind holes, It will cause great trouble for foundry sand cleaning. Of course, there are many other structural problems. We will improve and optimize the product structure according to the customer's drawings without changing the customer's functional use, so as to maximize the product qualification rate and production efficiency. In some cases where the structure cannot be changed, we will also perform some follow-up processing after casting according to actual problems, so that the expected results can also be achieved.
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