| 摘要 |
<p>The lining is of burnt basic bricks except for that part exposed to slag attack which is monolithic and formed of fused magnesite-chrome ore grains together with up to 10% magnesite, up to 10% chrome oxide and a binder, the total magnesite content, apart from binders, being less than 75%. Up to 0.2% boric acid may be present. The fused grain has a magnesite:chrome ore ratio of 30:70 to 70:30. Pref. binders are alkali or alkaline earth sulphates, carbonates, nitrates, chromates or chlorides.</p> |
