Graphite Crucibles for Metal Smelting

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Description

Graphite Crucibles for Metal Smelting

The main raw materials for graphite crucibles include graphite, silicon carbide, silica, refractory clay, pitch, tar, etc. Graphite crucibles have good thermal conductivity, high temperature resistance, small coefficient of thermal expansion during using at high temperatures and certain strain resistance to rapid heat and cold. Meanwhile, they are highly resistant to acid/alkaline solutions and exhibit excellent chemical stability.

Therefore, graphite crucibles are widely used in industrial sectors such as metallurgy, casting, mechanical, and chemical engineering. They are commonly used in the smelting of alloy tool steel, non-ferrous metals and alloys.

Material: High Purity Graphite

Purity: 99.99%

Molding Process: Compression Molding

Application: Non-ferrous Metal and other alloy melting

TECHNICAL SPECIFICATIONS OF HIGH PURITY GRAPHITE:

Porosity (%)	15
Compressive strength (Mpa)	99
Flexural strength (Mpa)	50
Ash (PPM)	200
Resistivity (μΩ·m)	15.7
Bulk Density (g/cm3)	1.78
Hardness( HSD)	60

Metallurgy Industrial Crucible High Purity Graphite Crucible for Melting Furnace

Size (OD×OH)	Outside Diameter(mm)	Inner Diameter(mm)	Outside Height(mm)	Inner Height(mm)	Capacity(ml)
20×20 mm	20	14	20	17	2.6
20×25 mm	25	14	25	17	2.6
30×30 mm	30	22	30	25	9.5
30×40 mm	30	22	40	35	12.5
30×60 mm	30	22	60	55	20
35×35 mm	35	25	35	30	14
35×45 mm	35	30	45	40
35×120 mm	35	25	120	115	50
40×40 mm	40	30	40	35	25
40×60 mm	40	30	60	55	38
45×80 mm	45	35	80	75	70
47×115 mm	47	41	115	112	145
50×50 mm	50	40	50	45	50
50×55 mm	50	40	55	50	55
50×80 mm	50	40	80	70	85
50×100 mm	50	40	100	90	110
60×60 mm	60	48	60	55	100
65×80 mm	65	50	80	70	135
65×100 mm	65	50	100	90	170
70×70 mm	70	58	70	60	155
75×80 mm	75	60	80	70	195
75×100 mm	75	65	100	90	300
80×30 mm	80	65	25	30	80
80×80 mm	80	65	80	70	210
80×90 mm	80	65	90	80	250
90×110 mm	90	70	110	100	380
100×100 mm	100	80	100	90	450
100×130 mm	100	80	130	120	600
135×120 mm	135	110	120	110	1000

Use an appropriate base (same material and equivalent size). Allow the crucible to expand and contract. The furnace cover should not be pressed on the crucible. In the resistance furnace, the fiber blanket should not be tightly compressed onto the crucible. The lining must be repaired and made as concentric as possible, which will prevent the flame in the flame heating furnace from deflection and impact on the crucible to ensure correct melting.

Preheating and maintenance (furnace temperature)

> Preheat for 3 hours at a constant temperature at 200 degrees;

> Preheat at a constant temperature of 700 degrees for 2 hours;

> Preheat at a constant temperature of 900 degrees for 1 hour;

> Shut down the furnace to cool the crucible to no redness;

> Then the temperature is raised to the normal aluminum melting/feeding temperature and the feeding is added in a vertical direction of 90 degrees.