Large Graphite Crucible

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Graphite crucibles are containers used for melting and casting non-ferrous and non-iron metals such as gold, silver, aluminum, and brass. Their excellent thermal conductivity, high-temperature resistance, low thermal expansion, and strong resistance to thermal shock during rapid heating and cooling make graphite crucibles an ideal tool for metal casting. They can withstand corrosion from acidic and alkaline solutions and offer outstanding chemical stability.

As a graphite crucible manufacturer, AGRM provides customized solutions tailored to each customer’s specific requirements. Our strict quality control ensures that all custom-designed crucibles meet industry standards. In addition to crucibles, we also produce a wide range of other graphite products, including graphite electrodes, graphite blocks, graphite sheets, graphite felt, and more.

Operating Temperature	200℃ ~ 2500℃
Machinable Diameter Range	300 mm – 800 mm (custom sizes available)
Bulk Density	> 1.75 g/cm³
Compressive Strength	25 MPa
Ash Content	≤ 0.1%
Available Shapes	Conical, cylindrical, irregular, and customized shapes; lids optional
Compatible Furnace Types	Gas generator furnace, gas furnace, coke furnace, oil furnace, resistance furnace, induction furnace, fuel furnace, biomass pellet furnace, etc.
Application Range	Melting gold, silver, copper, aluminum, lead, zinc, and other non-ferrous metals; medium-carbon steel; various rare-metal alloys
Raw Materials	Graphite (natural or synthetic): excellent high-temperature resistance, thermal conductivity, and chemical stability; synthetic graphite offers high purity for precision melting (e.g., semiconductor, monocrystalline silicon). Silicon Carbide (SiC): added to enhance hardness and corrosion resistance; suitable for melting metals like copper and aluminum.
Types	High-purity Graphite Crucible: nearly pure graphite (with minimal additives); ideal for high-temperature and high-stability applications like rare-earth and semiconductor industries. SiC-Graphite Crucible: graphite mixed with silicon carbide for enhanced wear resistance; suitable for long-term continuous melting.

Custom Designs Based on Your Requirements

Whether you need a smaller crucible for intricate jewelry casting or a larger one for industrial-scale operations, our customer service team enables you to specify the exact size and capacity required.

We offer a range of specialized coatings and surface treatments to enhance the performance and service life of graphite crucibles. From protective coatings that resist chemical reactions to coatings that prevent metal adhesion, we can customize the surface characteristics of the crucible according to your specific application.

Graphite crucibles can be manufactured using different grades of graphite, each with its own characteristics. We can help you choose the right graphite material based on your application. Whether you require high-purity graphite for sensitive laboratory use or durable graphite composites for demanding industrial processes, our expertise ensures you select the most suitable material.

Specification

Size Chart
Top outer diameter（mm）	Height（mm）	Base outer diameter（mm）
72	82	46
88	108	60
105	120	71
112	131	80
118	142	83
121	154	83
128	162	94
138	180	100
156	192	107
161	204	111
183	232	120
196	250	128
208	269	146
239	292	165
257	314	179
270	327	186
280	360	190
296	356	189
321	379	213
345	388	229
362	429	251
395	483	284
430	557	285
455	610	290
455	610	290
465	640	300
526	661	318
531	713	318
540	750	380
580	610	380
600	650	380
610	700	400
620	800	400
720	800	460

Highlights of AGRM Graphite Crucibles

Our graphite crucibles feature exceptionally high thermal conductivity, enabling rapid and uniform heat transfer even under extreme temperatures.
They are ideal for applications requiring highly consistent temperature distribution, such as metal smelting, glass processing, and ceramic treatment.
Their high heat-transfer efficiency significantly shortens melting time and can reduce energy consumption by 40% to 33%.

They offer a high melting point and outstanding thermal stability, maintaining structural integrity under extremely high temperatures.
With a low thermal expansion coefficient, the crucibles can withstand rapid heating and cooling without cracking.
They are particularly suitable for high-temperature metal melting, vacuum smelting, and other continuous, heavy-duty operations.

The crucibles exhibit excellent resistance to acids, alkalis, and most chemical reagents.
They do not react with or penetrate molten metals, ensuring high purity of the melted material.
This makes them ideal for industries with strict purity requirements, including precious-metal smelting and analytical laboratories.

The crucibles are dense, defect-free, and mechanically robust, making them difficult to break.
Made from high-purity raw materials with a specialized anti-oxidation design, they offer 5–10 times the oxidation resistance of conventional crucibles.
Their low porosity effectively resists chemical erosion from slag, fluxes, and casting agents.
Service life is 3–5 times longer than ordinary graphite-clay crucibles, significantly reducing overall operating costs.

Despite their high strength, graphite crucibles remain lightweight, making them easier to carry and operate.
They are ideal for applications involving frequent replacement, portable setups, or manual handling.

Graphite is inherently corrosion-resistant and wear-resistant, allowing the crucibles to be reused multiple times.
They are easy to clean and require no complicated maintenance, effectively reducing laboratory or production costs.

Composed mainly of carbon, graphite crucibles are non-toxic, non-volatile, and contamination-free.
They do not interfere with analytical testing, ensuring product purity and operational safety in high-purity manufacturing environments.

We offer crucibles in various sizes and structures to meet the needs of metallurgy, casting, laboratory analysis, and glass manufacturing.
Customized designs are available based on melting capacity, working conditions, and heating methods.

Factors to Consider When Purchasing Graphite Crucibles

Material
The material of a graphite crucible should offer excellent high-temperature stability and chemical resistance, along with favorable thermal expansion and contraction properties. Common materials include standard graphite, high-purity graphite, and ultra-high-purity graphite, each suitable for different applications.
Specifications
The specifications of a graphite crucible should be selected based on the requirements of laboratory or industrial melting processes. A crucible that is too small will limit melting capacity, while an oversized crucible may lead to unnecessary material and energy consumption.
Manufacturer
It is important to choose a manufacturer with strong credibility and advanced production technology to ensure product quality and reliable after-sales service.
Price
The price of a graphite crucible depends on its material grade, specifications, and manufacturing process. You should select an appropriate price range based on your actual application needs.