how to build a crucible furnace

{"cid":"91222446","title":"Coaxial Conductive Design Acuum Arc Remelting Furnace VAR \/ RVAR New Helium Cooling System For Crucible","imgUrl":"https:\/\/img.chinax.com\/nimg\/5b\/61\/3be4c554c5c4ba5c2bfbb4892d68-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"AE","Minimum Order Quantity":"1","Delivery Time":"30-90work days","Place of Origin":"China"}}

{"cid":"91222822","title":"Automatic Electrical Heating System Dryer for Induction Furnace Sintering","imgUrl":"https:\/\/img.chinax.com\/nimg\/ce\/01\/f74b19202c1ef761b1f527e274df-200x200-1.jpg","attrs":{"Minimum Order Quantity":"1","Model NO.":"Electrical Heating System Dryer","High Performance and Longer Furnace Life":"20% More","Energy Saving and Cost Reducing":"10% Less","Trademark":"HXS","Specification":"Quality check per lot","Origin":"China","HS Code":"3816000000"}}

{"cid":"91224502","title":"High Temperature Resistant Asbestos Insulation Melting Furnace with Graphite Crucible and Quartz Cover for Jewelry Smelting","imgUrl":"https:\/\/img.chinax.com\/nimg\/91\/4a\/cbe728d7c1e58d4ea72cc2248b7c-200x200-1.jpg","attrs":{"Temperature Error":"\u00b10.5% FS","Gross Weight":"12kg(1\/2\/3KG); 21kg(5KG)","External Dimension":"38.5\u00d738.6\u00d744cm(1\/2\/3KG); 41\u00d741\u00d751cm(5KG)","Melting Capacity":"1KG \/ 2KG \/ 3KG \/ 5KG","Working Environment":"0-50\u2103, 30-85% RH","Rated Power":"1750W(1\/2KG); 2050W(3KG); 2800W(5KG)","Net Weight":"10.5kg(1\/2\/3KG); 18.5kg(5KG)","Applicable Metal":"Gold, silver, copper and other precious metals","Model":"M.MF.001 \/ M.MF.002 \/ M.MF.003 \/ M.MF.005","Main Material":"High temperature resistant asbestos insulation, metal housing, graphite crucible, quartz cover","Power Supply":"110V 50\/60Hz 14A \/ 220V 50\/60Hz 7A"}}