Through optimization original material material alumina, and anode carbon block and fluoride of salt supply, reduced lithium, and iron, and silicon, impurities content, and for stable furnace created conditions; optimization electrolytic process technology, improved production operation, stable furnace; prevent aluminum liquid iron content increased; optimization out aluminum and cast system, strengthening aluminum products full process quality management, measures, success development Al99.90 high quality aluminum products. At present, its been Al99.90 primary aluminum output of 800 tons.