In　order　to　increase　the　durability　of　MgO－C　brick　in　LD－Optimizing　Refining　Process （ORP） furnace，MgO－C　brick was　improved　in　resistance　against　corrosion　and　oxidation　abrasion　which　were　supposed　to　cause　damages． 　Purification　of　both　magnesia　clinker　and　graphite　tumed　out　to　greatly　enhance　the　corrosion　resistance　of　MgO－C brick． 　Furthermore，resistance　against　oxidation　abrasion　was　increased　by　the　addition　of　SiC　or　spinel　or　both　of　them． 　Corrosion　resistance　was　also　increased　when　both　SiC　and　spinel　were　used． 　MgO－C　brick　with　both　SiC　and　spinel　was　developed　for　ORP－furnace． 　ln　service，the　MgO－C　brick　with　improved　oxidation　abrasion　resistance　showed　greater　performance　result　than　those　with　corrosion　resistance，whne　the　MgO－C　brick　with　both　SiC　and　spinel　was　three　times　as　durable　as　conventional　MgO－C　brick．

View full abstract