Vertical mill(VM)is one of the most effective pulverizer for various materials in many sectors. In cement manufacturing sector, in coal-fired power station and in steel-making industries, these VMs are most widely used in Japan. The parts in grinding zone of VM are rebuilt by hardfacing or replaced with new ones at certain period of time. To realize less-emission of CO2 gas, ecological cement which we call Eco-cement has started to be used and bio-mass fuel has also used in the field of paper

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... d pulp manufacturing for bio-mass boiler in Japan. In pulverizing new material such as waste, wood chip, RPF and others, VM is apt to become more worn-out due to abrasion than before. Welding Alloys Japan has been making rebuilding these VMs for more than1 0years and newly-developed technique by WA Japan is explained herein about Smart welding , In-situ rebuilding and the effect by these technologies.