| 摘要 |
PROBLEM TO BE SOLVED: To efficiently manufacture suppressing manufacturing costs by reducing thermal energy costs and roasting facility maintaining costs in a manufacturing process of nickel oxide powder by high temperature roasting. SOLUTION: In the heating furnace 1 for roasting, electric heating type side face heaters 3 and an electric heating type bottom face heater 4 in an opposing state are detachably attached in a divided state on three faces, both side face parts and a bottom face part, of a cylindrical type tumbling furnace 2, a rod like electric heater, preferably a rod like electric heater made by Shirikonitto Inc. is used as a heat source of the bottom face heater 4, and the bottom heater 4 is operated by fixed load during operation and load control is carried out in the side heaters 3 to supply thermal energy to an object (the nickel oxide powder) to be roasted in the tumbling furnace 2, and to roast the object (the nickel oxide powder) to be roasted. COPYRIGHT: (C)2007,JPO&INPIT
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