The reporter learned from the China Chlor-Alkali Industry Association on December 26th that the association has drafted the “Safe Access Conditions for the Caustic Soda Industry (Draft for Soliciting Opinions)†from the layout of production enterprises, production equipment and process requirements and safety facilities, and storage and transportation. Requirements, safety standardization requirements, responsibilities, supervision and management, etc., impose more stringent access to the caustic soda industry and are expected to be released next year. Insiders pointed out that this move will further enhance the competitiveness of leading companies and promote the industry reshuffle. The “Entry Conditions†stipulates that the new, modified, expanded, and relocated caustic soda projects must all adopt the ion membrane production process. The existing membrane caustic soda production device (except for the comprehensive utilization of resources) began on January 1, 2016, and the production safety After the license expires, it will not be replaced.
In addition, regarding the layout of production enterprises, the “Entry Conditions†stipulates that new-build caustic soda production enterprises must comply with “chlorine-alkali (caustic-alkali, polyvinyl chloride) industry access requirements†and should also be located in an industrial park or specialized area planned by the local government. Within the (aggregation zone) building, the site selection of the project shall meet the requirements of the “Sanitation Plant Protection Distance Standard for Chlor-alkali Plants (Electrolysis Alkali Production)†and comply with the overall local land use planning. Existing caustic soda production enterprises that are not located in industrial parks or specialized areas (agglomerations) planned by the local government must, in principle, plan or implement the land for relocation and construction projects by the end of 2015, and arrange for the implementation of withdrawal from the city.
The industry expects that the enhanced access of the caustic soda industry will further enhance the competitiveness of leading companies and promote industry reshuffle. From the comprehensive analysis of factors such as the decline in load, tight transportation, capital withdrawal, and export stabilization, the medium-term market for the caustic soda market is expected to gradually recover.
CBN abrasive is mainly used for steel parts, such as high speed steel, die steel, 45 steel, etc., can be made into electroplating CBN, resin CBN, sintered CBN. Can be made into grinding wheel, cutting pieces, grinding head. Abrasive sharp, high temperature resistance, good thermal stability, wear resistance. The hardness of CBN is higher than that of ordinary abrasives and the ability to maintain shape is one of the main characteristics of high performance abrasives. CBN is very resistant to pressure. CBN has good thermal conductivity and can achieve cold cutting during grinding.
strong wear resistance, long life
The grinding ratio of CBN wheel can reach 3500-5500, which is 100 times higher than that of ordinary corundum wheel and 3-5 times higher than that of diamond wheel.
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No too much powder dust.
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The grinding is sharp, the grinding force is small, the dressing cycle of CBN wheel is long, the dressing amount is less, and the replacement time is long. Long service cycle, high grinding ratio, can obtain better economy, good shape retention in use, do not need to change and trim grinding wheel often, save working hours, improve working conditions, is conducive to machining operation.
Cubic boron nitride is not suitable for grinding hard metals and non-metallic materials. At high grinding temperature, CBN will react with alkaline aqueous solution. CBN grinding wheel will decompose in alkaline solution at 300℃, and can decompose in trace amount in boiling water, which will destroy the crystal shape of grinding grains. Therefore, oily coolant should be used instead of water-based coolant during grinding.
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