Innovative anode casting technology helps companies improve quality and efficiency

Since the beginning of this year, Jiugang Dongxing Aluminum Co., Ltd. has actively implemented the group company's "expanding deposits and creating growth" work plan to promote the transformation and application of scientific research results as an entry point to further reduce production costs. At present, the company's high-carbon, low-silicon, and low-phosphorus technology research results have been further transformed and applied in the Jiayuguan anode assembly area, exploring the way out of anode casting with low cost and high efficiency.

Since the successful development of high-carbon, low-silicon and low-phosphorus technology in 2018, anode casting has been in a state of high-cost production due to the relatively high purchase price of new materials. Faced with the pressure of production and operation of enterprises, with limited space for cost reduction in other processes in aluminum production, in the second half of last year, technicians in the anode assembly area performed technical optimization. Although the production cost was reduced, the core technology of phosphorus pig iron was used. The specific composition is unstable, resulting in unstable pressure release rate of anode assembly iron ring equipment, which affects the stability of electrolytic aluminum production indicators to a certain extent.

At the beginning of this year, Dongxing Aluminum Industry Co., Ltd. set the goal of reducing anode assembly production costs by 20% compared with last year. In April, the group company issued the "Extend storage and innovation" work plan, clarifying that anode assembly production costs need to be further reduced by 20%. In this way, the anode assembly production cost needs to be reduced by 40% compared with last year. Faced with this important task, the anode assembly operation area decided to continue to increase the transformation and application of technology research and development results, with low phosphate technology as the starting point, and low-cost new material testing as a breakthrough, to completely solve the problem of unstable production at low cost .

In the exploration of low-phosphorus technology, the technicians after many experiments and researches, the carbon, silicon, manganese, phosphorus, sulfur and other elements in the phosphorus pig iron are reasonably proportioned, and it is found that when the carbon equivalent value is constant at about 4.27, the cast iron Various indexes such as fluidity and finished anode conductivity are the best. In order to achieve the optimal index, the technical staff put forward a more stringent goal, reducing the phosphorus element composition index, which is difficult to overcome, to 0.3%~0.6%. The successful control of the phosphorus index means that the carbon equivalent value can reach the ideal state of smelting, which plays a key role in the temperature of the molten iron. Every 100°C decrease in the temperature of the molten iron means that the treatment time of the molten iron in the intermediate frequency furnace can be reduced by 5 to 8 minutes, thereby effectively reducing the production cost.

On this basis, the technicians also broke the monopoly of new material technology for phosphorus pig iron low-phosphate technology, and through large-scale tests, on the basis of realizing 100% recycling of phosphorus pig iron waste, the waste cathode square steel, scrap steel claw and other scrap steel replaced high Carbon pig iron supplements the iron loss in the smelting of phosphorus pig iron and reduces the purchase of pig iron and phosphorus iron by more than 90%. After several months of production and application tests, the iron ring pressure release rate of the equipment has reached more than 98%, which has ensured the stable operation of the electrolytic cell production and the effective increase in production capacity, which has made Dongxing Aluminum Co., Ltd. achieve its goal of "expanding, creating and increasing". Actively contribute. "The low-phosphorus anode casting technology improves the quality of anode casting, can effectively reduce the power consumption of electrolytic aluminum, and the company has accelerated the pace of improving quality and efficiency." Dongxing Aluminum Company Jiayuguan Anode Assembly No. 1 Operation Area Party Branch Secretary and Operation Changcheng Yushan introduced Say.