Crucible

Crucible

Product Description

Silicon carbide graphite crucibles, composed of silicon carbide and graphite, are characterized by low porosity, high density, and uniform texture. They possess excellent thermal conductivity and chemical corrosion resistance, making them indispensable tools in high-temperature applications. They are widely used for melting and refining metals such as gold, silver, copper, aluminum, lead, zinc, zinc oxide, high-purity aluminum, and other alloys.

Silicon carbide graphite crucibles are made by sintering graphite as the base material with varying proportions of silicon carbide particles. The silicon carbide content can be customized to meet specific customer requirements regarding smelting conditions, furnace type, and raw materials.

Product Category: Natural Graphite Material

Raw Material: Graphite + Silicon Carbide

Packaging: Standard Wooden Frame Box

Factory Visit: On-site factory inspection available

Specifications: Multiple specifications in stock, customization supported

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Basic Info
Core Highlights
FAQ
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Customer Reviews

Basic Info

Serial Number	Model	OD	Height	ID	BD
1	80	330	410	265	230
2	100	350	440	282	240
3	110	330	380	260	205
4	200	420	500	350	230
5	201	430	500	350	230
6	350	430	570	365	230
7	351	430	670	360	230
8	300	450	500	360	230
9	330	450	450	380	230
10	350	470	650	390	320
11	360	530	530	460	300
12	370	530	570	460	300
13	400	530	750	446	330
14	450	520	600	440	260
15	453	520	660	450	310
16	460	565	600	500	310
17	463	570	620	500	310
18	500	520	650	450	360
19	501	520	700	460	310
20	505	520	780	460	310
21	511	550	660	460	320
22	650	550	800	480	330
23	700	600	500	550	295
24	760	615	620	550	295
25	765	615	640	540	330
26	790	640	650	550	330
27	791	645	650	550	315
28	801	610	675	525	330
29	802	610	700	525	330
30	803	610	800	535	330
31	810	620	830	540	330
32	820	700	520	597	280
33	910	710	600	610	300
34	980	715	660	610	300
35	1000	715	700	610	300
36	1050	715	720	620	300
37	1200	715	740	620	300
38	1300	715	800	640	440
39	1400	745	550	715	440
40	1510	740	900	640	360
41	1550	775	750	680	330
42	1560	775	750	684	320
43	1650	775	810	685	440
44	1800	780	900	690	440
45	1801	790	910	685	400
46	1950	830	750	735	440
47	2000	875	800	775	440
48	2001	870	680	765	440
49	2095	830	900	745	440
50	2096	880	750	780	440
51	2250	880	880	780	440
52	2300	880	1000	790	440
53	2700	900	1150	800	440
54	3000	1030	830	920	500
55	3500	1035	950	925	500
56	4000	1035	1050	925	500
57	4500	1040	1200	927	500
58	5000	1040	1320	930	500

Core Highlights

1. Advanced Technology: Utilizes isostatic pressing, resulting in excellent isotropy, high density and strength, uniform compactness, and a defect-free finish.

2. Complete Product Range: Offers diverse solutions for different customers, employing the most suitable varieties to meet various needs and extend service life.

3. Long Lifespan: 2-5 times longer than ordinary clay-graphite crucibles.

4. Corrosion Resistance: Advanced formula and high-quality materials effectively resist chemical corrosion.

5. Fast Thermal Conductivity: Employs high thermal conductivity materials, resulting in a dense structure after isostatic pressing, low apparent porosity, and rapid thermal conductivity.

6. High Temperature Resistance: The crucible's operating temperature range is 400-1600℃, with selectable ranges.

7. Energy Saving: Fast thermal conductivity reduces energy consumption and waste emissions.

8. Low Pollution: High-purity inorganic non-metallic materials are used, preventing the introduction of harmful impurities during metal melting.

9. Oxidation Resistance: Advanced formula and the use of imported antioxidant materials enhance the crucible's oxidation resistance.

10. Stable and reliable quality: The main raw materials are all from well-known foreign brands, and all materials have undergone strict inspection; each process in the production process has undergone strict inspection before it can enter the next process.

The crucible can be customized to meet the following customer requirements:

1. Provide a positioning hole for positioning; diameter 100mm, depth 12mm.

2. A pouring nozzle must be installed at the top of the crucible.

3. Add a temperature measuring hole.

4. Drill holes on the bottom or side according to the provided drawings.

FAQ

Q: Slow Heat Conduction

A: 1. Not preheating according to the standard procedure.
2. Slag influences heat conduction.
3. The crucible has reached its service life.
Q: Crucibe corrosion

A: 1. Adding flux before metal is molten or excessive use of flux.
2. Certain fluxes contain corrosion substances.
3. Fuel containing corrosive substance.
4. Abnormal high-temperature operation may result in glaze layer smelting resembling corrosion.
Q: Top problems

A: 1. Repeatedly top impacted on top area cause oxidation.
2.Slags accumulated arround the top area or between the top area and the furnace cover.
3.Small gape between the top and the furnace cover. 4. Low temperature on top area.
5. Contacting with some matels with lager heat exchanging coefficients.
6. Excentral installation cause not enough space between the top and furnace.
Q: Excessive oxidation

A: 1. Flame in furnace against the bottom of the crucible directly.
2. Low temperature in the top area. 3.Overheated working temperature.
4. Hoisting or moving improperly damages glaze layer.
5. The emergent drain hole is open.
Q: Explosion

A: 1.Heating rapidly while the crucible has damped during transportation or storage.
2. Over rapid heating-up during preheating procedure.
3. The added materials are not completely dried.
Q: Middle or bottom craks

A: 1.Impacted during transportation or installation.
2. Crucible should be placed in the middle of the furnace stack smoothly and stably.
3. An improper graphite stand is used.
4. The existence of great thermal difference in the furnace.
5.Matel ingots in the crucible filled horizontally or diagonally.Metal materials overfilled.
6. Leftover slag or molten matal in the crucible.

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