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White ash coal is a type of coal that has a characteristic bright or white-colored residue after the combustion process. This coal is known for its high carbon content and low sulfur, which makes it an ideal fuel source for various applications. There are different types of white coal based on the technology used in its production. Each type has unique features and advantages that make it suitable for different industrial applications. The main types of white coal are:
White ash bituminous coal
This is the most common type of white ash bituminous coal. It has a carbon content of about 45% to 86% and a high heating value of 24,000 to 30,000 kJ/kg. It also has a low sulfur content of 1% or less, making it an ideal fuel source for power generation and industrial heating. In addition, this type of coal produces less harmful emissions compared to other coal types.
White ash sub-bituminous coal
This type of coal has a carbon content of approximately 35% to 45% and a higher moisture content than bituminous coal. Its heating value ranges from 21,000 to 17,000 kJ/kg. It is usually used for electricity generation in power plants due to its lower heating value and high moisture content, which makes it suitable for steam generation.
White ash anthracite coal
This is the highest rank of coal with a carbon content of 90% or more. It has a low volatile matter content and the lowest sulfur and ash content compared to other ranks of coal. Its heating value is about 30,000 kJ/kg or more. Because of its high carbon content, anthracite coal burns very cleanly and produces very little smoke. It is mainly used for residential and commercial heating, as well as for industrial applications where clean burning is essential.
White ash lignite coal
This is also known as brown coal and is the lowest rank of coal. It has a carbon content of about 25% to 35% and a high moisture content of 60% to 75%. Its heating value ranges from 8,000 to 17,000 kJ/kg. Due to its low carbon content and high moisture content, lignite coal is usually used for electricity generation in power plants. It is also suitable for applications where low-grade fuel is required.
White ash coal is usually found in the form of lumps. These lumps are quite big and may vary in size. The most common forms of white ash coal are as follows:
Antrhacite:
It is the highest rank of coal with the least amount of impurities. Anthracite has a shiny black appearance with a very high carbon content of over 87 percent. It produces a high amount of heat and has a low white ash coal content. It is mainly used for residential and commercial space heating.
Bituminous:
It is the second-highest rank of coal. It has a carbon content of 45 to 86 percent. Bituminous coal has a shiny or dull black appearance with a medium to high carbon content. It is often used to produce electricity and steel and provides heat for industrial processes.
Sub-bituminous:
Sub-bituminous coal has a carbon content of 40 to 45 percent. It is lighter in color, ranging from gray to black, and has a higher moisture content. It is mainly used for generating steam in power plants.
Lignite:
Lignite is the lowest rank of coal. It has a carbon content of 25 to 30 percent and a very high moisture content. It has a soft brown texture and is primarily used to generate electricity.
Due to its unique properties, white ash coal can be used in many industries, which makes it a very desirable mineral fuel.
Steel industry
White coal is used as a reducing agent in metallurgical processes for iron and steel production. It produces less sulfur and phosphorus in the final product compared to other coals.
Cement industry
White ash coal is used as a raw material in the production of cement. Its high silica, alumina, and calcium oxide content are used to form the clinker. The clinker is then ground to make cement.
Glass industry
The glass manufacturing industry also uses white coal. The silica in white ash coal is used to make glass.
Construction industry
In the construction industry, white ash coal is used as an additive in making concrete and bricks. It improves the durability and workability of the concrete. It also reduces water demand.
Environmental applications
White ash coal is also used in landfill covers, mine reclamation projects, and as a soil amendment. Its use in these applications helps to recycle a waste product and reduce the environmental impact of coal ash.
Power generation
Like other coals, white coal is also used for power generation. It has a high calorific value, so it is burned in power plants to produce electricity. Its low sulfur content also reduces the emission of acid rain, making it suitable for power generation.
These scenarios show the importance of white ash coal in many industries. With its unique properties, it is a valuable resource that helps to improve processes and products in different fields. Coal suppliers and traders are always in touch with white ash coal manufacturers to fulfill the demand in the market. The demand for white ash coal is increasing rapidly due to its clean-burning properties, making it an ideal fuel for the future.
For business buyers, choosing white ash coal is a critical decision that can impact the efficiency, emissions, and overall performance of their industrial processes. Here are some key factors to consider when selecting white ash coal:
Understanding the Coal Specifications:
Business buyers should have a clear understanding of the coal specifications provided by the supplier. These specifications outline the coal's physical and chemical properties, including its calorific value, sulfur content, and ash composition. By comprehending these details, business buyers can assess whether the coal meets their performance and environmental requirements.
Assessing Supplier's Reputation and Reliability:
It is crucial for business buyers to evaluate the reputation and reliability of white ash coal suppliers. They should seek suppliers with a track record of delivering high-quality coal consistently and on time. Additionally, business buyers can consider suppliers who hold relevant certifications, such as quality management system certifications, to ensure the coal's quality and the supplier's commitment to quality assurance.
Considering Environmental Regulations:
Business buyers need to be aware of the environmental regulations and standards related to coal usage in their industry. They should select white ash coal that complies with these regulations to avoid potential legal issues or penalties. Additionally, business buyers can opt for suppliers who provide environmentally friendly coal products with lower emissions to support their sustainability goals.
Evaluating Cost and Total Cost of Ownership:
Cost is always an important factor for business buyers when choosing white ash coal. They should evaluate the coal's price and consider the total cost of ownership, including transportation costs, handling costs, and potential maintenance costs. By conducting a comprehensive cost analysis, business buyers can make economically viable decisions.
Conducting Trials and Testing:
Before making a large-scale purchase, business buyers can conduct trials and testing with small coal samples from different suppliers. They can analyze the coal's performance in their specific applications and assess its combustion efficiency, emissions, and suitability. This empirical evaluation can provide valuable insights to support the selection decision.
Engaging Technical Experts:
Business buyers can involve technical experts or consultants in the coal selection process. These experts can provide professional advice and support, helping business buyers evaluate coal specifications, assess supplier capabilities, and conduct trials. The involvement of technical experts can enhance the coal selection process's rigor and effectiveness, reducing the risks associated with selecting unsuitable coal.
Q1: What is the white ash in coal?
A1: The white ash in coal is a result of the high content of alumina and silica in it. It is also known as coal ash and is the inorganic residue left after the combustion of coal.
Q2: What are the characteristics of white ash coal?
A2: This type of coal has a high calorific value and produces less sulfur. It also has a white or grayish ash conforming to the dendrite or angular fused silica and alumina crystals.
Q3: Why is white ash coal expensive?
A3: Coal with white ash is expensive because it is clean coal and in demand. Suppliers who provide this kind coal can sell it at a premium price.
Q4: What is the white ash coal uses?
A4: This type of coal is used in industries that require a coal with low sulfur content and produce less ash. It is also used by cement manufacturers and in the production of paper and pharmaceuticals.
Q5: What is the white coal ash brick?
A5: White coal ash bricks are made from the white residue left after burning coal. These bricks are environmentally friendly building materials.
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