1. Instruction Lha series ammonia synthesis catalyst has high activity, steady performance and long service life with high resistance of thermal and poison than other items. It is mainly used in ammonia synthesis industry, making ammonia by reaction of hydrogen and nitrogen, also it can be used in metallurgy and electronic industry. 6.2 chemical component This catalyst is mainly consisting of feo, al2o3, k2o, cao. Feo, wt% 68~70 Appearance Irregular particle with metallic luster and magnetism Available size 1.5~3, 3.3~4.7, 4.7~6.7, 6.7~9.4, 8~12 Bulk density, kg/l2.2~2.8 Porosity, %46 Pore volume, ml/g.13 Specific area, m2/g13 6.3 operating condition Temperature: 360~510 Initial hot spot temperature: 450~470 Pressure: 15~32 mpa Space velocity: 10000~30000 h-.