Vacuum induction melting furnaces专利检索-陶瓷砖建筑材料建筑材料专利检索查询-专利查询网

Vacuum induction melting furnaces

阅读：988发布：2023-09-26

专利汇可以提供Vacuum induction melting furnaces专利检索，专利查询，专利分析的服务。并且Vacuum induction furnaces comprising a crucible having a lining layer of bricks of sintered fusible lime, and surrounded by an insulated inductive heating coil present a problem of preventing metal break-out during use. This problem is overcome according to the invention by the provision of a crucible comprising three layers, namely progressing inwardly a heat-insulating ceramic layer, a rammed oxide layer and the said lining layer, the thickness of the said layers being selected so that in use the rammed oxide layer sinters in a zone adjacent the lining layer, the unsintered zone thus taking up movement due to contraction and expansion effects of the crucible in use.，下面是Vacuum induction melting furnaces专利的具体信息内容。

权利要求

1. A vacuum induction melting furnace comprising a. a crucible having a lining layer of bricks of sintered fusible lime, b. an insulated inductive heating coil surrounding the said crucible, c. a heat-insulating ceramic layer interposed between the said heating coil and the said crucible adapted to provide a barrier against metal break-out, and d. a rammed oxide layer interposed between the said heatinsulating ceramic layer and the said crucible lining, the said oxide layer being a layer of metal oxide which does not form a relatively low-melting point eutectic with lime, the thicknesses of the said heat-insulating ceramic layer, the said rammed oxide layer and the said lining layer being selected so that in operation the said rammed layer becomes sintered in a zone adjacent the said lining layer while a zone adjacent the said heat-insulating ceramic layer remains unsintered to permit slidable relative movement as the said lining layer expands and contracts in use.

2. A furnace according to claim 1, wherein the said heat-insulating ceramic layer comprises a mass of plastics ceramic material.

3. A furnace according to claim 1, wherein the said heat-insulating layer comprises a wall of fused oxide bricks.

4. A furnace according to claim 1, wherein a web of spun glass fibers is provided between the said heat-insulating ceramic layer and the said rammed oxide layer.

5. A furnace according to claim 1, wherein the bottom of the crucible thereof comprises an outer layer of oxide ceramic refractory bricks supporting a layer of fused lime.

6. A furnace according to claim 5, wherein the said layer of fused lime is a rammed layer.

7. A furnace according to claim 5, wherein the said layer of fused lime is a brick layer.

8. A vacuum induction melting furnace comprising a. a crucible having a lining layer of bricks of sintered fusible lime, b. an insulated inductive heating coil surrounding the said crucible, c. a heat-insulating ceramic layer interposed between the said heating coil and the said crucible adapted to provide a barrier against metal break-out, d. a rammed oxide layer interposed between the said heat-insulating ceramic layer and the said crucible lining, the said oxide layer being a layer of metal oxide which does not form a relatively low-melting point eutectic with lime, and e. a web of spun-glass fibers interposed between the said heat-insulating ceramic layer and the said rammed oxide layer, the thIcknesses of the said heat-insulating ceramic layer, the said rammed oxide layer and the said lining layer being selected so that in operation the said rammed layer becomes sintered in a zone adjacent the said lining layer, while a zone adjacent the said heat-insulating ceramic layer remains unsintered to permit slidable relative movement in combination with the said web of spun-glass fibers as the said lining layer expands and contracts in use.

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