Energy saving and environmental protection in spring steel wire production
Spring steel wire production in the surface treatment, mainly to remove wire or semi-finished steel wire surface oxidation, and increase the coating, in order to facilitate the latter process of drawing lubricant brought in, common surface treatment for the large pool pickling, phosphating and other processes, the process due to the coil as a whole coil processing, large pool open, pickling and phosphating and other processes need to be heated, resulting in the surface treatment of neither energy-saving, nor environmentally friendly, but also the quality control of products Much inconvenience, its transformation space is huge, at present there are the following kinds of surface treatment process can be borrowed and applied:
(1) mechanical shelling + online continuous chemical pickling or ultrasonic cleaning + boron coating online treatment, the process technology is mature, in the steel cord, cutting steel wire, bead steel wire and high-pressure hose steel wire and other products mature application, with high production efficiency, stable product quality, less acid, relative energy saving;
(2) shot blasting + electrolytic phosphating, also occasionally applied to the surface treatment requirements of spring steel wire, is also a better production process, high-speed iron shot on the wire surface quality improvement, improve the spring life is very beneficial;
(3) mechanical shelling + sand belt treatment + online coating peng, but the sand belt cost is relatively high, but more environmentally friendly;
(4) tunnel-type closed pickling system, the system is also the whole coil surface treatment, but the level of automation is high, coil in the closed tunnel kiln inside the pool step-by-step cleaning, acid utilization rate is high, but the investment is large, an annual output of 100,000 tons of production line, the investment is as high as 6 million yuan.
Key words:
spring steel wire
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