Recently, the new zirconium oxychloride production process developed by Zibo Guangtong Chemical Co., Ltd. was evaluated by the China Petroleum and Chemical Industry Association as "the core technology has independent intellectual property rights, and product technology fills domestic gaps". Through new processes and equipment, Guangtong Chemical has achieved the discharge and comprehensive utilization of the "three wastes" in the production process. Consumption per ton of zirconium oxychloride products has been reduced by about 5%, and production labor has been reduced by about 38%. Technology upgrade.
Compared with the traditional zirconium oxychloride production process, Guangtong Company changed the original process of recovering unmelted sand after the silica gel was formed. The unmelted sand was recovered in the initial stage of acidification, and a jacketed dual-channel device was made to make Unmelted sand recovery increased from 10% to 95%. The new process greatly simplifies the separation operation. The core process adopts a number of key equipments such as fully-automatic pull-plate diaphragm filter press, centrifugal extraction machine, fully-automatic top-suspended centrifuge, and crystal automatic control device. The new process also uses a fully automatic continuous concentration device, which uses negative pressure instead of positive pressure to realize multi-stage recycling of vaporization heat, and changes intermittent production to continuous production, which improves work efficiency. At the same time as product quality is improved, per ton of oxychlorination The sodium hydroxide, hydrochloric acid and steam consumed by zirconium were all significantly reduced, and the total recovery rate of zirconia was increased from 93% to more than 96%.
Recycling the waste silicon slag discharged in the production of zirconium oxychloride is a major innovation of the new process. Wastewater and waste slag generated during the production of zirconium oxychloride are complicated in post-treatment. Guangtong Company adopted the self-developed dissolution technology to convert waste water slag into a by-product, which improved the economic benefits of the device while solving environmental problems. The new process adopts the three-stage absorption method of two-stage water absorption and one-stage alkali absorption for the volatilized gas in the production process to achieve complete absorption of HCl gas; in the treatment of external drainage, Guangtong Company adopted electrodialysis for the first time in the industry. RO MVR technology realizes the extraction of high-quality industrial salt by-products and the recycling of waste water, and the entire system of high brine treatment process adopts DCS remote control.
The production process of zirconium oxychloride has always faced the challenge of coping with environmental pollution. China is also the world's largest producer, consumer and exporter of zirconium oxychloride, so the development of new processes is first of all conducive to environmental protection. Secondly, zirconium oxychloride is a raw material for preparing dozens of zirconium compounds such as zirconia, zirconium carbonate, zirconium sulfate, and zirconium nitrate. The new process is of great value and significance for increasing the added value of the zirconium-based industry chain.