Study On The Preparation Of The High Quality Pre-baked Anode

The quality of pre-baked anode (also called carbon anode, anode carbon block, for short) will directly affect the current efficiency and energy consumption of aluminum electrolytic production. On the anode of the process, control and other aspects of the in-depth study is very important. In this paper, the gap between domestic anode technology and international advanced level is compared, and the production process of high quality pre baked anode is studied. By improving the ingredients, innovation and production formula and brown with molecular value guidance of pre-baked anode production recipe ingredients. At the same time, using the international advanced detection equipment auxiliary production, starting from the improvement of production technology, high-quality pre baked anode samples is successfully prepared, to meet the market demand.(1) In this thesis, abandon the current domestic pre baked anode production enterprises to adopt generally 6 mm maximum size formula, instead of the maximum size of 8mm production formula, the R & D of the sample resistance, compressive strength, volume density and CO2 reactivity of reached or better than YS/T 285-2012 quality requirements;(2) In this paper by experiment that used method for controlling powder Brown values to guide the production, brown value by 3000 up to 3600, get better physical properties of green plastic material and structure more uniform green, at the same time, green and pre-baked anode first-rate product rate has been significantly improved;(3) This paper points out that strict control of raw materials of microelement, can significantly improve its antioxidant properties, thereby remaining rate of original 65-75% increased to 9196% of developed anodic products air reactivity; CO2 reactivity from the original 83% increase to 93%;(4) According to the pre-baked anode manufacturing production process control requirements and the key production equipment for technological transformation, the adoption of new technology in automation and the realization of the production of some intelligent control system run reliable and simple operation, improve product quality and labor efficiency, reducing the labor intensity, work environment has been greatly improved.This paper uses large granular formulation and high brown fine powder ingredient value, was used to adjust the process parameters, paste temperature control to 170 plus or minus 2 DEG C, kneading time increased to 100 minutes, green vibration molding time increased to 120 seconds, of green quality significantly improved, the density by the 1.65g/cm3 the original to the high to 1.67g/cm3. After calcination of the resistivity of prebaked anode products 54 Mu Omega-m, air infiltration rate 1.5npm following, the main quality index reached the quality of pre-baked anode quality requirements.