Graphite Crucibles Wholesell/High Strengh CNBM
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- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 0 m.t.
- Supply Capability:
- 10000 m.t./month
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Features
1.Long working lifetime: its working lifetime is increased 3-5 times over normal clay-crucible due to the compact body formed under high pressure.
2.High thermal conductivity: highdensity body and low apparent porosity greatly improve its heat conductivity.
3.Newstyle materials: new heat conduction material ensures faster heat conductivity and pollution-free product, reduces adherent slag.
4.Resistance to corrosion:better anti-corrosion than normal clay-crucible.
5.Resistance to oxidation: advanced process dramatically improves its oxidation resistance, which ensures persistent heat conductivity and long working lifetime.
6.High-strength: high-density body and logical structure make the product better compression property.
7.Eco-friendly: energy-efficient and pollution-free, not only ensure metal product purity, but also ensure sustainable development on environment.
8.Multi-function: Can be used in induction graphite crucible furnace
Specification
Bulk Density | g/cc | 1.70-1.88 |
Specific Resistance | μΩ.m | 6.0-15.0 |
Compressive Strength | MPa | 30-80 |
Bending Strength | MPa | 20-45 |
Shore hardness | 30-70 | |
C.T.E.(100-600°C) | x10-6 /°C | 2.5-5.5 |
Ash | % | 0.01-0.2 |
Maximum Grain Size | mm | 0.044-0 |
Product Uses
1. Graphite crucible cannot be exposed in moisture, and must be placed in indoor dry place or wooden shelf. Maintain ventilated. Moisture is strictly prohibited. Damped crucible is likely to crack.
2. Each crucible, especially damped ones, must be preheated and roasted in drying equipment or next to a ground furnace before use. The roasting temperature should start from a low temperature of 100°C below. Roast it to 150°C at a speed of not higher than 30°C per hour. Preserve the heat for about 8 hours and then dry it. The crucible dried next to a ground furnace should be placed at least for one shift, and often turned to change direction, till workers feel the internal wall of crucible is hot.
3. The melting time for the first time should be at least twice of the normal melting time, in order to avoid cracking inside the crucible due to heating up too fast, or even cracking immediately when the fire sets on.
4. Handle with care. Falling or shaking is strictly forbidden in order to present cracking. Crucible should be placed below the mouth of furnace to prevent the furnace lid abrading the upper edge of the crucible and thus affecting the capacity.
5. Pour out the remaining cold metals inside the crucible after use, and then add new materials. Carefully and gently add new materials into the crucible. Feed materials according to the capacity of crucible. It is not allowed to feed too many materials, in order to prevent crucible from swelling or bursting.
6. Knock gently to remove slags and cokes on the internal and external wall of the crucible. Avoid damaging the crucible body.
7. In the melting process, do not add chloride solvents in order not to corrode the crucible. For the furnace that uses oil and coal gas as fuels, the oil wind should not reach one part of the crucible directly. Turn around the crucible from time to time, in order to avoid local damage.
8. Clamps and other discharging tools should comply with the shape of the crucible. During furnace discharging, remove the cokes on the external wall of the crucible, and lower the furnace temperature; do not discharge at high temperature after stopping blasting. Clamp the upper and middle parts instead of the top of the crucible in order not to damage the crucible. Graphite crucible is used mainly to melt gold, silver and other precious metals.
- Q: We need to make a poster... Of the 27 essential elements of the human body, I am in charge of carbon! I haven't found it for a long time! Who can help me? Urgent!!!!!!Can you find something very specific? Thank you
- The three to four billion years of life symphony, whose theme is the evolution of carbon chemistry.
- Q: What is the structure of a diamond, a form of carbon?
- The structure of a diamond, a form of carbon, is a crystal lattice arrangement where each carbon atom is covalently bonded to four other carbon atoms in a tetrahedral arrangement. This gives rise to a three-dimensional network of carbon atoms with a repeating pattern. The bonds between the carbon atoms are extremely strong, resulting in the hardness and durability of diamonds. The arrangement of carbon atoms in a diamond forms a cubic crystal system, specifically the face-centered cubic (FCC) structure. This means that each carbon atom is surrounded by a total of eight neighboring carbon atoms, creating a dense and tightly packed structure. The strong covalent bonds and the compact arrangement of carbon atoms in the diamond lattice give rise to the unique properties of diamonds, such as their exceptional hardness, high thermal conductivity, and optical brilliance.
- Q: How does carbon affect the quality of drinking water?
- Carbon can affect the quality of drinking water through two main mechanisms: activated carbon filtration and carbon dioxide (CO2) absorption. Activated carbon filtration is commonly used in water treatment processes to remove organic contaminants, chemicals, and odors, improving the taste and odor of drinking water. On the other hand, excessive dissolved carbon dioxide in water can make it acidic and affect the pH level, potentially making it corrosive and altering the taste. However, carbon itself is not harmful to human health and can be beneficial in certain forms, such as in the form of activated carbon filters.
- Q: How is carbon used in the production of paints and coatings?
- Carbon is commonly used in the production of paints and coatings as a pigment or filler. It can be derived from various sources, such as carbon black or activated carbon, and is added to paint formulations to provide color, opacity, and UV resistance. Additionally, carbon-based materials can be used as additives to enhance the durability, adhesion, and corrosion resistance of coatings.
- Q: What are the effects of carbon emissions on the stability of coastal ecosystems?
- Carbon emissions have significant negative effects on the stability of coastal ecosystems. The increased concentration of carbon dioxide in the atmosphere leads to ocean acidification, which disrupts the delicate balance of marine ecosystems. This acidity affects the growth and development of various organisms such as corals, shellfish, and other calcifying organisms, jeopardizing the health of coral reefs and shellfish populations. Additionally, rising sea levels, a result of climate change caused by carbon emissions, threaten coastal habitats, including wetlands and mangroves, which serve as critical nurseries and protective buffers against storms. Overall, carbon emissions contribute to the degradation and vulnerability of coastal ecosystems, compromising their stability and the services they provide to both marine life and human communities.
- Q: How is carbon used in the production of pigments?
- The ability of carbon to create vibrant and deep colors makes it a common choice for pigments. These pigments, also known as carbon blacks, are produced by incomplete combustion of hydrocarbons like natural gas or petroleum. The resulting carbon particles are then processed and purified to create a fine powder that serves as a pigment. Various industries, including inks, paints, plastics, and cosmetics, utilize these carbon-based pigments. In the ink production process, carbon black is frequently added to enhance color intensity and opacity. Similarly, in the manufacturing of paints and coatings, it is used to provide a rich and deep black color. Plastics can be enhanced by adding carbon black, which improves their UV resistance, making them more durable and long-lasting. This is especially crucial for outdoor applications where exposure to sunlight can lead to fading and degradation. Carbon-based pigments are also widely used in the cosmetics industry. They are incorporated into products like eyeliners, mascaras, and lipsticks to create intense black or dark shades. The stability and consistent color delivery of carbon black pigments make them a preferred choice in cosmetics. In summary, the ability of carbon to create vibrant and deep colors makes it extensively used in pigment production. Carbon-based pigments have diverse applications in various industries, enhancing color intensity, providing UV resistance, and delivering rich black shades.
- Q: How is activated carbon produced?
- Activated carbon is produced by heating carbon-rich materials, such as wood, coal, or coconut shells, at high temperatures in the absence of oxygen. This process, known as activation, creates a highly porous material with a large surface area, which gives activated carbon its adsorptive properties.
- Q: How does deforestation contribute to carbon emissions?
- Deforestation plays a significant role in contributing to carbon emissions. When forests are cleared or burned down, the carbon stored in trees and vegetation is released into the atmosphere in the form of carbon dioxide (CO2), a greenhouse gas that contributes to global warming. Forests act as natural carbon sinks, absorbing CO2 from the atmosphere through the process of photosynthesis. Trees and plants convert CO2 into oxygen and store the carbon in their trunks, branches, leaves, and roots. This process helps to regulate the Earth's climate by reducing the concentration of CO2 in the atmosphere. However, when forests are deforested, this natural carbon storage system is disrupted. The carbon that was once stored in trees and vegetation is released back into the atmosphere, increasing the concentration of CO2. This process is further exacerbated when forests are burned, as the combustion of trees and plant material releases even larger amounts of carbon. The loss of forests also leads to a decrease in biodiversity and the destruction of habitats for numerous species, which in turn disrupts the delicate balance of ecosystems. As these ecosystems are disrupted, they become less efficient at absorbing and storing carbon, further contributing to increased carbon emissions. Moreover, deforestation contributes to carbon emissions indirectly through several other means. For instance, when trees are cleared, the soil beneath becomes exposed to sunlight and heat, causing it to dry and release stored carbon. Additionally, deforestation often leads to the conversion of land for agricultural purposes, such as livestock farming or palm oil plantations, which can result in increased methane emissions, another potent greenhouse gas. In summary, deforestation contributes to carbon emissions by releasing the stored carbon in trees and vegetation, disrupting the natural carbon storage system, and indirectly contributing to the release of other greenhouse gases. It is crucial to address deforestation and promote sustainable land management practices to mitigate the effects of climate change and reduce carbon emissions.
- Q: when to use hard carbon, and when to use soft carbon. Neutral charcoal can play what role? Thank you.
- Soft charcoal as easily broken, so soft to the name. Hard charcoal is not easy to break, of course, also called hard charcoal. Models are generally marked with charcoal, it is easy to distinguish. When used, you can also judge.
- Q: What are the impacts of carbon emissions on the stability of grasslands?
- The stability of grasslands is significantly affected by carbon emissions. When carbon dioxide (CO2) is released into the atmosphere, it contributes to the greenhouse effect and causes global warming. This rise in temperature has various harmful consequences for grasslands. To begin with, higher temperatures can disrupt the equilibrium of grassland ecosystems. Many grassland species require specific temperatures for their growth and reproduction. As temperatures increase, these species may struggle to adapt, resulting in a decline in their populations. This disruption can negatively impact the overall biodiversity and ecological stability of grasslands. Additionally, global warming can change precipitation patterns, leading to alterations in water availability in grasslands. Reduced rainfall or increased evaporation can create drought conditions, making it challenging for grasses to flourish. This can ultimately cause grasslands to transform into barren areas devoid of plant life, a process known as desertification. Moreover, carbon emissions contribute to the acidification of the oceans, which indirectly affects grasslands. Acidic ocean waters impact marine organisms, including those responsible for generating nutrients that are carried by winds to coastal and inland grasslands. If these nutrient sources decline, grasslands may experience reduced fertility and productivity, ultimately affecting the stability of these ecosystems. Lastly, carbon emissions can worsen the frequency and intensity of wildfires. Grasslands are naturally adapted to periodic fires, which play a vital role in maintaining biodiversity and regulating plant populations. However, the increase in carbon dioxide levels can fuel more severe and frequent wildfires, leading to the destruction of grasslands and making their recovery more challenging. In conclusion, carbon emissions have numerous negative impacts on grassland stability. They disrupt the balance of grassland ecosystems, change precipitation patterns, contribute to ocean acidification, and increase the risk of wildfires. These effects can result in biodiversity loss, desertification, reduced fertility, and overall instability in grassland ecosystems. It is essential to reduce carbon emissions and mitigate the consequences of global warming to ensure the long-term stability and preservation of grasslands.
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Graphite Crucibles Wholesell/High Strengh CNBM
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 0 m.t.
- Supply Capability:
- 10000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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