Coal-based columnar activated carbon is a material with excellent adsorption properties and is widely used in many fields such as air purification, water treatment, gas separation, chemical catalysis, etc. The manufacturing process of coal-based columnar activated carbon is a complex industrial process involving multiple steps from the selection of raw materials to the inspection of the final product. This article will introduce in detail the manufacturing process of coal-based columnar activated carbon to help you understand the production of this material and its excellent properties.
The main raw material of coal-based columnar activated carbon is coal, usually bituminous coal or anthracite coal. Bituminous coal contains higher fixed carbon and is suitable for producing high-strength columnar activated carbon; anthracite coal, due to its lower ash content and higher porosity, is suitable for producing activated carbon with low ash content and high adsorption performance. The choice of coal directly affects key indicators such as pore structure, specific surface area, and adsorption capacity of the final product.
In the process of selecting coal, activated carbon manufacturers will carefully select suitable coal sources based on market demand and the requirements of different applications. Generally speaking, the source of raw coal, coal quality characteristics, ash content, moisture content, etc. will affect the final quality of coal-based columnar activated carbon. As we all know, the best raw material for columnar carbon is produced in Ningxia. Our Ningxia Huamei activated carbon factory is only 60 kilometers away from the anthracite coal mine, which greatly reduces transportation costs.
Before making coal-based columnar activated carbon, coal needs to be ground into powder, mixed with a certain proportion of coal tar and water to form a paste, and then extruded. Finally dry.
In the process of selecting tar, different manufacturers will choose according to market demand. Some manufacturers even use other binders to replace tar in order to reduce costs, but the activated carbon produced will have some quality problems. Our Ningxia Huamei activated carbon factory insists on using high-quality coal tar and strictly follows the best production technology to provide customers with high-quality products.
Carbonization is one of the key steps in the production process of coal-based columnar activated carbon. At this stage, the dried coal is heated to a certain temperature (usually 600-900°C), and the heating reaction is carried out in an oxygen-free or oxygen-deficient environment. This process converts organic matter in coal into carbon black and releases moisture and volatile matter.
The purpose of carbonization is to remove volatile matter from coal through high temperature so that the remaining solid carbon becomes a porous structure with a large specific surface area. The control of this step is crucial, as temperature that is too high or too low may affect the quality of the final product. And it will affect the length of the carbon.
Activation is the most important process step in the manufacture of coal-based columnar activated carbon, which directly determines the pore structure and adsorption performance of the carbon. During the activation process, the carbonized coal comes into contact with water vapor at high temperatures, which further opens the pores in the coal through physical reactions to form carvão ativado with a high specific surface area and porous structure.
The activated columnar activated carbon needs to be cooled. The columnar activated carbon will gradually cool down to room temperature through cooling equipment to ensure its stability.
After cooling, the activated carbon particles undergo dust removal screening to separate particles of different sizes. The purpose of screening is to ensure the consistency of the final product and ensure that activated carbon particles of different particle sizes can meet the needs of different customers. Normally, the Ningxia Huamei activated carbon factory will carry out dust removal three times to ensure the cleanliness of the activated carbon.
Depending on different uses and requirements, coal-based columnar activated carbon may be classified according to particle size. For example, some applications require smaller particle sizes, while other applications require larger particles to enhance flow rates and adsorption efficiency.
In the final stage of coal-based columnar activated carbon manufacturing, strict quality testing is required. These tests include CTC, iodine value, ash content, mechanical strength, particle size distribution, etc. Ensure that each batch of coal-based columnar activated carbon meets industry standards and customer needs.
After passing quality inspection, qualified activated carbon products will be packaged. When packaging, activated carbon needs to be stored sealed to avoid moisture absorption or contamination to ensure its stability and adsorption performance.
Coal-based columnar activated carbon is widely used in the following fields due to its excellent adsorption performance and structural stability:
·Gas adsorption: such as air purification, waste gas treatment, biogas desulfurization, etc.
·Water treatment: such as drinking water purification, wastewater treatment, etc.
·Solvent recovery: such as the recovery and reuse of chemical solvents.
·Gas separation: such as oxygen, nitrogen separation, etc.
The manufacturing process of coal-based columnar activated carbon is a highly specialized technical process that requires strict control of raw material selection, carbonization, activation, molding and other links. Through these fine processes, the final product can meet the needs of different application fields and has extremely high adsorption capacity, durability and structural stability. As the market's demand for environmental protection and energy conservation increases, the application prospects of coal-based columnar activated carbon in multiple industries will become broader.
