Smelting ladle and method for improving use efficiency thereof

A smelting ladle, comprising:

• a housing, a permanent layer, a circulating working layer, and a consumable working layer;
• the permanent layer comprising an inner permanent layer and an outer permanent layer;
• wherein:
• the permanent layer is masoned on an inner wall of the housing, the circulating working layer is casted on the inner wall of the permanent layer, and the consumable working layer is masoned on an inner wall of the circulating working layer;
• the permanent layer is formed by the inner permanent layer contacting with the circulating working layer and the outer permanent layer contacting with the housing;
• the inner permanent layer is masoned by a first heat insulating blocks;
• and
• the outer permanent layer is masoned by alternate arrangement of the first heat insulating blocks and a second heat insulating blocks.

A smelting ladle, comprising:

• a housing, a permanent layer, a circulating working layer, and a consumable working layer;
• wherein:
• the permanent layer is masoned on an inner wall of the housing, the circulating working layer is casted on the inner wall of the permanent layer, and the consumable working layer is masoned on an inner wall of the circulating working layer;
• a castable of the circulating working layer comprises:
• between 55 and 70 parts by weight of a sintered microporous corundum aggregate, between 5 and 10 parts by weight of a magnesia-alumina spinel aggregate, between 10 and 25 parts of a fine powder, between 2 and 8 parts by weight of a micro powder, between 3 and 8 parts by weight of a binder, between 0.1 and 0.5 part by weight of a detonation suppressor, between 0.05 and 2 parts by weight of a water reducing agent, and between 0.01 and 0.1 part by weight of a foaming agent;
• the fine powder comprises a component A and a component B;
• the component A is one selected from a fused white corundum and a sintered tubular corundum, and the component B is one selected from a magnesia-alumina spinel and a magnesia;
• and
• the micro powder is a mixture of a SiO2 fine powder and an active α-Al2O3 fine powder or a mixture of the SiO2 fine powder and a sintered tubular corundum fine powder.