Wear resistant fan

Wear resistant fans are designed specifically for abrasive airflow containing hard particulate dust, slag, sand and gravel, and metal debris. They focus on strengthening the impeller and casing in areas prone to erosion, resisting solid particle impact wear. They are commonly used in high wear conditions such as mining, sand and gravel, metallurgy, coal powder, and clinker transportation.

1、 Working principle

Most of them are centrifugal structures, and the airflow carries solid particles into the fan, which continuously impact and wash the blades and shell walls; By using wear-resistant materials and structural design, erosion losses can be reduced and equipment lifespan can be extended.

Differentiation: Ordinary dust removal fans are mostly used for purifying clean flue gas; Wear resistant fans can directly transport high concentration dusty gases.

2、 Common models

6-48, 5-47: Medium pressure wear-resistant centrifugal fan, mainstream for sand and gravel, crushing and dust removal

9-19, 9-26 High pressure wear-resistant models: Powder high-pressure conveying

M series wear-resistant fan (for coal mill and mineral powder)

3、 Wear resistant treatment plan (core)

1. The blade is welded with tungsten carbide (the most commonly used), and the working surface of the impeller blade is welded with hard alloy, which has strong wear resistance; Suitable for high hardness particles such as ores and metal dust.

2. Paste wear-resistant ceramic shell and ceramic lining on the inner wall of the snail shell to resist erosion; Suitable for large particles and low-speed working conditions. Disadvantage: Sharp particles are prone to smashing off ceramic tiles.

3. Adding Mn13 wear-resistant steel plate to the easily eroded area of the thickened steel plate and wear-resistant manganese plate shell is cost-effective and easy to maintain and replace.

4. The overall wear-resistant casting impeller is made of cast steel wear-resistant impeller, which is integrally formed and suitable for coarse particles, large impact working conditions, and heavy self weight.

4、 Whole machine structure

Thickened casing+wear-resistant impeller+air inlet+bearing box+common base

External bearing box to prevent dust from entering the bearings and protect the lubrication system

The combination of labyrinth seal and dust-proof seal is used for sealing to prevent dust from entering the spindle. The accessories include wear-resistant inlet air damper, soft connection, spring shock absorber, muffler, coupling guard, and variable frequency control cabinet

5、 Core Features

1. Strengthen key flushing areas, significantly improve service life, and reduce downtime for maintenance

2. Can be used for negative pressure suction or positive pressure conveying of granular materials

3. Strict dynamic balancing at the factory, long-term operation under dust conditions to control vibration

4. Can be matched with variable frequency speed regulation to adjust air volume and pressure as needed

5. Explosion proof version is optional, suitable for combustible dust conditions such as coal powder

6、 Applicable scenarios

Mining crushing, sand and gravel production line, cement clinker, coal grinding system, metallurgical sintering, sandblasting dust removal, tailings transportation.

7、 Key parameters for selection

1. Airflow, total pressure

2. Dust particle hardness, particle size, dust concentration (most important)

3. Medium temperature, presence or absence of water vapor

4. Transportation method: negative pressure suction/positive pressure feeding

5. Wear resistant process selection: surfacing/ceramic lining/manganese plate

6. Is it explosion-proof

8、 Installation points

1. Suggest adding a coarse separation device (cyclone dust collector) to the front-end to reduce the direct intake of large particles into the fan and reduce wear and tear

2. The base is equipped with spring shock absorbers, and soft connections are installed at the inlet and outlet to isolate vibration

3. Pipeline independent support, pipeline weight cannot press fan flange

4. Install a protective net at the air inlet to block large foreign objects and prevent direct impact on the impeller

5. Regularly inspect the wear of the blades, repair welding in advance to avoid impeller failure

9、 Common faults

1. Blade wear and thinning, and in severe cases, perforation; Dynamic balance is disrupted, resulting in a sharp increase in vibration

2. Ceramic chip detachment: large particle impact, aging of adhesive layer

3. Dust invades the bearing box, lubricating grease fails, and the bearing heats up and is damaged

4. The inner wall of the snail shell is worn through, and the shell is leaking dust

5. Dust accumulation and agglomeration on the impeller, unbalanced vibration