| 摘要 |
PURPOSE:To improve corrosion resistance by blending a coarse aggregate with a well-known casting material in relation to a method for producing the coarse aggregate to be blended with the casting material. CONSTITUTION:The aforementioned method for production is constructed from a mixing step for blending, e.g. readily oxidizable metallic powder such as aluminum powder, metallic silicon powder or aluminum-magnesium alloy powder in an amount of 1-5wt.% together with 2-5wt.% thermosetting resin as a binder in a refractory raw material composed of 75-95wt.% magnesia clinker powder and 5-25wt.% carbon raw material and providing a body, a forming step for forming the aforementioned body into a prescribed shape and a heat-treating step for heating the formed compact at 150-300 deg.C temperature for a prescribed time. |
