The general process flow of the technology is that after comprehensive pretreatment of the integrated waste water, the integrated wastewater is integrated into the comprehensive tank for further treatment. After the precipitant is added, the clear water is raised to the membrane recovery system, and 85% of the water is separated and used for production. 15% concentrated water is treated with special chemical methods. The technology can not only reuse the heavy metal chromium in the plating tank, but also return the water resources to the rinsing tank, which has the dual effects of economic benefits and environmental protection.
According to incomplete statistics, there are about 15,000 chemical electroplating plants in China, and 400 million tons of waste water and other pollutants containing heavy metals will be discharged each year. Membrane recovery technology, as an emerging processing technology, overcomes the disadvantages of traditional chemical methods such as high cost and easy waste of resources and secondary pollution. The self-developed electroplating wastewater recycling technology organically combines existing chemical methods, membrane separation technology, vacuum evaporation, and biochemical methods, increasing the metal ion recovery rate from 95% to 99%, and the water recovery rate. From the original 80% to 85%, the concentration of metal ions increased from 100 times to 300 times.
At present, Xiamen Weishibang Company has built 4 sets of electroplating wastewater membrane recycling and recycling systems for Luda Xiamen Industry Co., Ltd., which not only recovers metallic nickel ions, but also reuses water resources, and clean water treated by membrane treatment devices. The water quality is exactly the same or even better than tap water. Luda Company can save 20,000 tons of water each year, recover 5 tons of nickel, and save 200,000 yuan in chemical treatment costs. At present, Xiamen Weishibang Membrane Co., Ltd. has nearly 500 sets of water treatment system engineering equipment and is operating normally in factories of electronics, medicine, electroplating and other industries, and has received favorable comments from customers.
According to the classification of forging process, closed die forging and open die forging are commonly used. Closed die forging generally keeps the gap between the upper die and the lower die during the forging process, and the material is formed in the closed die cavity around it. Generally, no flash is generated. A small amount of excess material will form longitudinal flying spurs, and the flying spurs can be removed in subsequent steps. Closed die forging improves the dimensional accuracy and surface quality of the product, reduces flash, and improves the utilization of materials.
SCZY mainly produces hot forging products, both closed die forging and open die forging are produced, which can depend on the requirements of the product. Whether it is closed die forging or open die forging, we will fully consider it during mold development to reduce the occurrence of defective products in the production process. Our own internal mold manufacturing, forging production and subsequent secondary CNC machining can cooperate with each other, which can better ensure product quality and production delivery.
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