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Coal briquettes play a crucial role as an energy source today, and their quality significantly influences various factors, including combustion efficiency, environmental pollution, and production costs. This paper will thoroughly examine the four main factors that affect coal quality and discuss ways to optimize these elements to enhance the overall performance of coal.

угольные брикеты
угольные брикеты

Nature of raw coal

The quality of coal briquettes is primarily influenced by the nature of raw coal. Key indicators such as the degree of coalization, bonding, and moisture content play a crucial role in determining its quality. Research indicates that when the bonding index of raw coal exceeds 60, both the mechanical strength and combustion performance of the coal improve significantly.

Additionally, high moisture content can increase the breakage rate of coal during the drying process, so it is generally recommended to keep the moisture content of raw coal below 10% to maintain stable quality.

raw coal powder
raw coal powder

Coal preparation

A well-planned coal blending program is essential for ensuring coal quality. By combining raw coals of varying qualities, we can optimize the coal’s composition and enhance its performance. Coal blending not only boosts the calorific value and combustion efficiency but also helps in significantly lowering costs.

Industry data shows that the right blending ratios can cut coal production costs by 10%-15% while enhancing combustion efficiency. For instance, blending low-rank coal with high-rank coal can address the weaknesses of low-rank coal’s poor bonding, thereby improving its mechanical strength and combustion characteristics.

Binder type and additive amount

The binder plays a crucial role in determining the strength, water resistance, ash content, and combustion efficiency of coal. Experimental results indicate that using a composite binder can enhance the initial strength of coal by 20% to 30% and decrease the drying breakage rate by 15% to 20%.

However, it is essential to carefully control the amount of binder used; adding too much can lead to higher ash content and lower combustion efficiency while using too little can compromise the strength of the coal and increase the breakage rate.

charcoal for grilling
charcoal for grilling

Molding conditions

Molding pressure, molding temperature, and molding method are crucial factors that influence the strength and density of coals. When the molding pressure exceeds 10MPa, there is a significant increase in the mechanical strength of the coal type.

The molding temperature plays a vital role in determining the bonding and curing speed of the coal, with the ideal range being between 150℃ and 200℃. Additionally, various molding methods yield different qualities of coal; for instance, the strength of coal produced through the hot pressing process is the highest, whereas the mechanical strength of coal briquettes formed through wet molding is comparatively lower.

forming molds
forming molds

Different molds get different shapes of finished coal briquettes production. We produce many types of molding machines such as barbecue charcoal briquette machines, hookah coal briquettes forming machines, and so on. Welcome to contact us to know more.

By optimizing these factors, we can greatly enhance the combustion efficiency of coal while also lowering production costs. If you’re interested, we can provide a high-quality charcoal molding solution tailored to your needs. Don’t hesitate to reach out and let us know how we can assist you.