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Business Ideas and Opportunities in Graphite Crucible

Business Ideas and Opportunities in Graphite Crucible. Production of Graphite Crucible

A crucible is a ceramic or metal container in which metals or other substances may be melted or subjected to very high temperatures. While crucibles historically were usually made from clay, they can be made from any material that withstands temperatures high enough to melt or otherwise alter its contents.

Crucibles used for copper smelting were generally wide shallow vessels made from clay that lacks refractory properties which is similar to the types of clay used in other ceramics of the time. During the Chalcolithic period, crucibles were heated from the top by using blow pipes. The use of crucibles in the Iron Age remains very similar to that of the Bronze Age with copper and tin smelting being used to produce bronze. The Iron Age crucible designs remain the same as the Bronze Age.

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Features:

High density graphite crucibles are utilized in vacuum

Inert atmosphere furnaces

Best suited crucibles for quality melting

High thermal conductivity

Heat shock resistance: Graphite crucible is strong, it can withstand high temperatures.

High heat resistance

Corrosion resistance

Oxidation resistance

Anti-adhesion

Resistance to slag remover

Acid resistance

Use of Graphite Crucible

Graphite crucible is widely used for experiment and the melting of metals, graphite crucible material with special of high purity, high strength, high density graphite material; through high precision CNC machining equipment, can be machined graphite crucible, graphite casting crucible, graphite oil groove, slide, drawing tablets, pull rod of mould graphite products. Graphite crucible for smelting noble metals selected special graphite materials can make the graphite crucible product 2 times more than ordinary materials product durability, longer service life, more can withstand more than 2000°C high temperature! Graphite crucible features:

1 good thermal stability of graphite crucible: for the use of graphite crucible quench.

2 graphite crucible good corrosion resistance, impact resistance, in order to ensure the reliability of product quality.

3 graphite crucible, good resistance to acid and alkali.

4 good heat conduction performance of graphite crucible: it can greatly shorten the smelting time, save energy.

5 the ash of the graphite crucible is less than 300pp, so that the precious metal is not polluted in the smelting process.

Mainly used in auto parts, electronics and new materials industry, graphite crucible is melting and holding non-ferrous metals and new materials resistant containers.

Can also be used in the refining and purification of nonferrous metals and new materials.

For the benefit of environmental protection, the international efforts to improve the weight of light metals in industrial products.

Therefore, aluminium, magnesium, zinc and its alloys are widely used in the production of automobile, motorcycle and electronic products. If the engine cylinder cover die-casting production of automobile and motorcycle wheels, engine, brakes, air filter, piston, a radiator, a direction plate skeleton and electronic products in the mobile phone shell.

Applications

Lubrication

Refractories

Foundry

Battery Production

Others

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Manufacturing Process of Graphite Crucible

During the sintering process of graphite crucibles, the organizational structure of the green body has a series of changes, the changing part is mainly the plastic refractory clay. The basic process of the crucible sintering can be divided into the following four stages to illustrate:

Preheating and baking stage. The temperature at 100~300 degrees, it is the process of graphite crucibles exclude residual moisture. The heating speed should slow and the kiln roof should be open, it should control the temperature strictly especially when the graphite crucibles in the residual moisture content exceeds 3%, otherwise the crucibles will have the crack and it maybe explode.

Low temperature firing stage: 400-600℃ is the Low temperature stage of sintering of the graphite crucible. With the increase of the temperature of the kiln, the combination water in the crucible begins to decompose and remove. the main composition in clay are Al2O3 and SiO2, once formed, they are in the free state, the glaze layer of crucible surface has not yet melted, heating speed should be still slow, if the heating speed is too fast and uneven, it also prone to explode and the collapse of the crucible bing .

Mesothermal sintering stage: 700-900 is the Mesothermal sintering stage of graphite crucible. At this time, the amorphous Al2O3 in clay may be partially converted into y crystalline Al2O3 when the kiln temperature gradually increased, the Al2O3 and Si0'exist in the Free State form hard silicate cured material, it connect the graphite and clinker in crucible and then solidified into a whole. In the medium temperature sintering process, the surface glaze layer in graphite crucible melt with the increasing of temperature gradually and form a layer of glass like glaze film, enclosed or covered on the surface of the crucible, it protect the crucible from oxidation. During this period, it is better to heat up quickly and the original flame should be good in the kiln.

High temperature firing stage: The temperature of this stage temperature is iooo-1200cc. The clay in graphite crucible after sintering in the medium temperature form curing, gradually transformed into mullite, such as 3A1203+2Si07:3Al203'2Si0. (Mullite). During this period, the heating rate should be faster than in the middle temperature (commonly known as the fire process), the furnace flame should be controlled in the neutral flame or reducing flame. The glaze layer has been completely melted during the crucible in high temperature sintering process, forming a glass like glaze film, close to the crucible surface. If the temperature exceeds the maximum temperature limit of sintering glaze, it easily cause the oxidation of the crucible. Therefore, in the high temperature sintering process, we should observe the glaze layer melting condition of graphite crucible and avoid the burnt and not up to the sintering. Mullite (3A1203'2Si02), a senior Department of physical and chemical properties of refractory minerals and a stable. The density, hardness, refractoriness and softening point are very high, low coefficient of thermal expansion. In the structure of the crucible, it is an important role of consolidation and hardening. It can be known that, in the crucible sintering process, due to the thermal effect of plastic refractory clay, the consolidation of graphite and clinker has a certain mechanical strength. Therefore, high and low of the sintering temperature, temperature control in the process of operation, it will has an important influence to the quality and service life of graphite crucible products.

Market Outlook

The global graphite market was valued at $14.3 billion in 2019, and is expected to reach $21.6 billion by 2027, registering a CAGR of 5.3% from 2020 to 2027. On the basis of application, the refractories segment has garnered the highest market share. This is attributed to increase in demand from the steel industry as graphite electrode is increasingly used in the electric arc furnace steel making .Moreover, rise in demand for graphite to produce crucibles, ladles, and molds to hold molten metal boosts the growth of the market during the forecast period.

Asia Pacific is expected to be a prominent graphite crucibles market across the globe during the forecast period. The market in the region is likely to expand significantly in the next few years owing to growth of the foundry industry in the region.

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India are likely to drive the Asia Pacific graphite crucibles market in the next few years. Growth of metal casting, production of machineries, and metallurgical applications in these countries is likely to lead to significant demand for graphite crucibles. A well-established automotive industry in Europe and demand for casting products in North America is expected to drive the demand for graphite crucibles in these regions.

Graphite crucibles are widely used in experiments and for melting metals through high precision CNC machining equipment. Graphite crucibles of high purity, high density, and high strength are used in these applications.

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Growth of the foundry industry is a major factor driving the graphite crucibles market. A growing industrial sector coupled with the increasing need for specialized metal and alloy castings is expected to enhance the demand for graphite crucibles during the forecast period.

Key players

Zircar Refractories Ltd.

Diamond Crucible Co. Ltd

Graphite India Ltd.

H E G Ltd.

Pandian Graphites (India) Ltd

Rahul Graphites Ltd

S V I Carbon Pvt. Td.

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