Application of lignite Coal dryer

Lignite coal, also known as brown coal, is a type of low-grade coal with a relatively low carbon content, typically ranging from 25% to 35%. It is usually obtained through open-pit mining, which keeps mining costs low. Compared to other types of coal, lignite coal has a higher moisture content, typically ranging from 20% to 70%, lower heating value, and higher ash and sulfur content. Therefore, it requires drying treatment before application.

• Coal slime, raw coal, any kinds of fine coal in coal industry;
• Iron powder, copper powder, zinc powder and any other metal granular materials in ore processing and mining;
• Clay, limestone, sand, silica/quartz sand, bentonite, slag, etc. in building materials
• Non-thermal sensitive materials in metallurgy;
• Other kinds of powder and particle that need to be dried specially.

Why Dry Lignite?

Lignite coal, due to its high moisture content and low heating value among other unfavorable characteristics, is challenging to use in industrial applications. The comprehensive utilization of lignite coal has become an urgent issue. During the mining process, lignite coal is typically washed and exposed to open-air storage, resulting in high moisture content and easy agglomeration. Therefore, drying lignite coal is essential. Investing in the lignite coal drying industry not only brings significant economic benefits but also contributes positively to society by protecting the environment.

Advantages of Zoneding Lignite Drying Machine

• Increasing Heating Value: Drying reduces the moisture content of lignite coal, thereby increasing its heating value. This improves the combustion efficiency of lignite coal, reducing fuel consumption costs.
• Improving Combustion Characteristics: Removing moisture improves the combustion characteristics of lignite coal, making it more combustible and stable, thereby reducing emissions during combustion.
• Expanding Utilization: Dried lignite coal can be more widely used in energy production, industrial processing, chemical engineering, and other fields, enhancing its value and market competitiveness.
• Reducing Transportation Costs: Dried lignite coal is lighter and smaller in volume, reducing transportation costs and energy consumption.

lignite Coal dryer working principle

ignite Dryer adopts the new technology of drying after crushing, which realizes the industrialization, automation and continuous production.  When the lignite dryer machine works, wet lignite is fed into the crushing equipment firstly. Then low-temperature four-stage drying process is introduced and dries the wet lignite to the humidity of 13% or below. 

ZONEDING Lignite Coal Dryer

Customers buy rotary dryers primarily for drying lignite coal, but they can also be used for drying raw coal, coal slime, bituminous coal, and other coal materials. Additionally, they are widely applicable in industries such as building materials, chemical engineering, and casting for drying materials like blast furnace slag, metal powder, limestone, aggregates, and sand, which are non-sticky and non-thermosensitive. ZONEDING’s lignite coal rotating dryer adopts a low-temperature four-stage drying process to ensure the quality of lignite coal remains unchanged, reducing its moisture content from the original 20%-70% to below 13%. This lignite coal dryer improves the utilization rate of lignite coal, generating substantial economic benefits while addressing issues such as land occupation and environmental pollution caused by lignite coal storage, thereby enabling more comprehensive utilization of lignite coal resources.

Enhanced structural optimization for greater adaptability:

The lignite coal dryer features a newly designed internal structure that enhances its ability to clean and conduct heat to dispersed materials, eliminating sticking to the inner wall of the drum and improving adaptability to material moisture and stickiness.

The new type of support roller device for reduced wear:

Utilizing a “self-aligning support roller device,” the lignite coal rotary dryer ensures linear contact between the support roller and the rolling ring, resulting in zero horizontal thrust. This design significantly reduces wear on the supporting rollers, ensuring smooth and reliable operation of the drum.

Co-current drying for high thermal efficiency:

The rotating dryer adopts a co-current drying method, where the flue gas and wet materials enter the dryer from the same side. This setup allows for intense evaporation using high-temperature flue gas, leading to lower outlet temperatures of the dryer and consequently higher thermal efficiency.

General Specification

Model	Volume of the drum(m³)	Capacity(t/h)	Installation slope(%)	Maximum intake temperature (℃)	Main motor power(kw)	Weight(t)
Φ0.6×8	2.2	0.4-0.6	3-5	700-850	3	3.2
Φ0.8×10	5	1.3-1.8	3-5	700-850	4	4.4
Φ1.0×10	7.8	2.0-3.0	3-5	700-850	5.5	5.3
Φ1.2×10	11.3	3.0-4.0	3-5	700-850	7.5	8.1
Φ1.2×1.2	13.5	3.5-5.0	3-5	700-850	11	9.1
Φ1.5×12	21.2	5.5-7.5	3-5	700-850	15	14.6
Φ1.5×15	26.5	7.0-10	3-5	700-850	15	16.5
Φ1.8×12	30.5	8.0-11	3-5	700-850	18.5	21.9
Φ1.8×18	45.8	12-16	3-5	700-850	18.5	26.6
Φ2.0×20	62.8	16-23	3-5	700-850	22	36.5
Φ2.2×22	83.6	22-30	3-5	700-850	30	43.9
Φ2.4×22	99.5	26-35	3-5	700-850	45	53.1
Φ2.5×25	122.7	32-45	3-5	700-850	45	62.6
Φ2.6×24	127.4	33-46	3-5	700-850	45	63.0
Φ2.8×28	172.4	44-62	3-5	700-850	45	85.0
Φ3.0×25	176.6	45-64	3-5	700-850	75	89.0
Φ3.2×25	201	50-72	3-5	700-850	90	95.0
Φ3.4×28	254	65-92	3-5	700-850	110	122.0
Φ3.6×28	285	73-103	3-5	700-850	160	129.0

Trusted Sand Dryer Manufacturer——Zoneding

Zoneding is your trusted manufacturer and designer of sand dryers. Over the years, we have accumulated rich experience in the industry, always committed to providing excellent product quality and premium customer service. At Zoneding, we understand the importance of product quality, so we rigorously control every production process to ensure that each piece of equipment meets the highest standards. Furthermore, we prioritize user experience. From manufacturing to delivery, and from installation to commissioning and after-sales service, we have a professional team to follow up on every step, ensuring your user experience is worry-free.

Our product range also includes grinding mills, crushers, conveyors, feeding machine as well as beneficiation equipment, fine sand recycling equipment etc,which are widely applied in electricity, metallurgy, mine and quarry ,wharf, granary, chemical industry. Zoneding can provide you with safe and reliable solutions. Choosing Zoneding means not only getting high-quality products but also experiencing our professional, meticulous, and attentive service. Let’s work together to create a better future!