Mining Equipment Frequently Asked Questions

A crusher is used to reduce large rocks into smaller stones, gravel, or sand in mining, quarrying, and construction industries.

The most common types include jaw crushers, cone crushers, impact crushers, hammer crushers and mobile crushers.

Jaw crushers are used for primary crushing, while cone crushers are mainly used for secondary and tertiary crushing.

Crusher efficiency can be improved by: 1. Optimizing feed size (matching the feed particle size to the crusher cavity type, no oversize materials); 2. Regular maintenance (lubricating bearings, replacing worn jaw plates/concave convex plates in time); 3. Selecting equipment according to material hardness (jaw crusher for primary crushing of hard rock, cone crusher for secondary crushing).

Crushers can process granite, basalt, limestone, quartz, iron ore, and other hard rocks.

A ball mill is used to grind materials into fine powder in mineral processing, cement production, and chemical industries.

A ball mill works by rotating a cylinder filled with grinding media that crushes and grinds materials.

Optimizing grinding media size, adjusting rotation speed, and controlling feed size can improve grinding efficiency.

Ball mills are suitable for grinding ores, cement clinker, limestone, and other minerals.

Common issues include excessive vibration, liner wear, and reduced grinding efficiency.

The sand making machine uses high-speed rotating impellers to throw materials at a high speed. Materials collide with each other or impact the liner inside the crushing chamber, achieving crushing and shaping to produce qualified manufactured sand.

For soft materials like limestone, a general sand making machine can be used. For hard materials such as pebble, granite and basalt, a high-efficiency vertical shaft impact sand making machine with strong wear resistance is more suitable.

You can adjust the feeding amount, check and replace worn impellers or liners, control the feed particle size within the required range, and optimize the impeller speed to improve the sand particle shape.

Main wearing parts include impellers, wear blocks, and liners. Under normal working conditions, the replacement cycle is 1–3 months, depending on material properties and daily working hours.

Low output may be caused by uneven feeding, worn internal parts, unreasonable feed size, or insufficient motor power. Solutions: ensure uniform feeding, replace worn parts, and match the feed size to the equipment requirements.

Small sand making machines: 10–50 t/h; Medium: 50–150 t/h; Large: 150–300 t/h and above, for large-scale sand production lines.

It mainly removes mud, dust, and impurities from manufactured sand, improves sand cleanliness, reduces stone powder content, and produces high-quality finished sand for construction and engineering projects.

Wheel sand washers feature low water consumption, small sand loss, and low cost. Spiral sand washers have longer cleaning time, higher cleaning efficiency, and are more suitable for materials with high mud content.

Increase water supply appropriately, extend the cleaning time, control the feeding speed, and use a spiral sand washer or add a fine sand recovery unit for materials with extremely high mud content.

For high-standard sand production, a fine sand recovery machine is recommended to reduce fine sand loss, improve yield, and avoid environmental pollution caused by sand discharge.

Regularly check and add lubricating oil, inspect the motor and reducer, clean impurities inside the equipment, check the wear of screen and impeller parts, and tighten loose bolts.

It uniformly and quantitatively conveys materials to crushers or other equipment, prevents uneven feeding, blockage, and equipment damage, ensuring stable operation of the whole production line.

The feeder’s processing capacity should be 10%–20% higher than the crusher’s rated capacity to ensure sufficient and stable feeding without affecting production efficiency.

Adjust vibration amplitude and frequency, clear blocked materials, control feed particle size, check whether the vibration motor works normally, and keep the feeding port unobstructed.

Regularly check vibration motor lubrication, bolt tightness, spring condition, and motor current. Clean attached materials and replace damaged parts in time.

Check whether bolts are loose, springs are damaged, motors are unbalanced, or materials are stuck. Fasten parts, replace damaged components, and remove blockages.

No. Feeders are used for uniform quantitative feeding. Conveyors such as belt conveyors are used for long-distance material transportation. They have different functions and cannot replace each other.

A vibrating screen separates materials into different sizes during the crushing and screening process.

Screen mesh size, vibration intensity, feed rate, and material moisture content can all affect screening efficiency.

Improving feed distribution, selecting the correct screen mesh, and maintaining vibration motors can increase screening efficiency.

Clogging usually occurs when materials contain excessive moisture or when the screen mesh size is too small.

We suggest weekly routine inspection (check screen mesh tension, bolt tightness) and monthly in-depth maintenance (lubricate vibration motor bearings, check shock spring status) for vibrating screens; for heavy-duty working conditions, the inspection frequency can be increased to 2-3 times a week.

A sand production line typically includes crushers, sand making machines, vibrating screens, and sand washing machines.

Manufactured sand is manufactured sand produced by crushing rocks using specialized equipment.

Yes, manufactured sand can fully replace natural river sand in construction when it meets the national standard GB/T 14684-2022 (Sand for Construction) and industry standard T/JCS 07—2023 (High-quality Manufactured Sand), including key indicators such as fineness modulus (2.3-3.2), stone powder content (≤10%), and crushing value (≤20%).

Raw material quality, crushing equipment, and screening technology affect sand quality.

A sand production line should be designed based on raw material type, production capacity, and final product requirements.