01Gypsum and Friable Minerals
Reducing gypsum and similar friable minerals to a size suitable for grinding, drying or the next process step. Grate opening is selected for the target size.
Mining and Mineral ProcessingHammer Crusher – Impact Crushing with Rotor and Hammers
PRO MAKINA · Hammer Crusher
- Crushing principle
- Hammer impact and collision
- Material
- Friable, medium-hard raw materials
- Output control
- Grate / screen opening
- Wear parts
- Hammers, grate, liners
Overview
Controlled Size Reduction by Impact
In a hammer crusher, hammers pivoted on a high-speed rotor strike the material falling into the crushing chamber and break it. Fragments are thrown against breaker plates inside the housing and are impacted repeatedly until they reach the target size.
Crushed material leaves through the openings of the grate or screen below the rotor. Product size is therefore largely determined by grate opening, rotor speed and hammer arrangement.
Hammer crushers are used for gypsum, salt, limestone, coal and similar friable or medium-hard materials. For very hard and highly abrasive materials hammer wear accelerates, so the machine is selected together with material data.
01Process Flow
Hammer Crusher Material Flow
The diagram shows the typical flow in which the hammer crusher takes material at the inlet and discharges product that has passed through the grate. Screening and conveying are done by separate equipment.
Scroll horizontally to view the full diagram.
Material line
- 1
Material feeding: Material is fed steadily into the crushing chamber from a hopper or feeder.
- 2
Hammer impact: Hammers on the rotating rotor strike and break the material.
- 3
Breaking on plates: Thrown fragments hit breaker plates and are reduced further.
- 4
Discharge through the grate: Product at target size passes the grate to the outlet.
Material larger than the target size cannot pass the grate and continues to be impacted in the crushing chamber.
02Applications
Hammer Crusher Applications
01
02Rock Salt and Chemical Raw Materials
Crushing rock salt and similar crystalline raw materials to suit the process inlet. Corrosion is considered when selecting housing and hammer materials.
Chemical Process Industry
03Limestone and Medium-Hard Aggregates
Size reduction of low-abrasive limestone and similar materials in crushing and screening lines. Hammer life is assessed separately for abrasive products.
Screening and Classification
03Design & Manufacturing
Custom Hammer Crusher Design and Manufacturing
PRO MAKINA engineers hammer crushers around raw material type, feed size, target product size and capacity. Rotor, hammer arrangement, breaker plates, grate, housing and drive are designed together; rotor speed and motor power are defined by process calculation.
- Rotor and hammers matched to material
- Replaceable hammers and liners
- Grate opening for the target size
- Inspection doors and dust connection
Process Design Data
- 01
Raw Material
Material type, hardness, abrasiveness, moisture and clay content.
- 02
Feed Size
Maximum lump size and feeding method.
- 03
Target Product
Required top size and fines limit.
- 04
Rotor and Hammers
Rotor diameter and width, number, type and material of hammers.
- 05
Drive and Maintenance
Rotor speed, motor selection, vibration, dust and access.
Rotor speed, motor power and capacity are defined by material tests and process calculation; no generic values are stated on this page.
04FAQ
Hammer Crusher FAQ
How does a hammer crusher work?
Hammers on a high-speed rotor strike the material and throw fragments against breaker plates. Product at target size leaves through the grate below the rotor.
Which materials suit a hammer crusher?
Gypsum, salt, limestone, coal and similar friable or medium-hard materials. With very hard, highly abrasive materials hammer wear increases.
How is product size adjusted?
Product size is mainly set by grate opening, rotor speed and hammer arrangement. Different grate openings change the target size.
Which parts wear?
Hammers, grate bars and breaker plates. A replaceable design and inspection doors help shorten maintenance time.
What information is needed for a quotation?
Material type, hardness and abrasiveness, moisture, maximum feed size, target product size and hourly capacity.
05Resources
Related Machines and Plants
Jaw CrusherPrimary crushing of coarse material between a fixed and a moving jaw.Vertical Shaft Impact CrusherCrushing by impact after acceleration in a vertical shaft rotor.Chain CrusherSize reduction of lumps and friable products with rotating chains.Screening SystemsSeparating bulk material by particle size.
Related machine groups:Screening SystemsConveying SystemsDust Collection SystemsSilos & Feeding Systems
Technical Quotation
Request a technical quotation for a hammer crusher
Share your raw material, feed size and target product size, and we will define the hammer crusher together with you.
Information Needed for a Technical Quotation
- Material type and hardness
- Abrasiveness, moisture and clay content
- Maximum feed size
- Target product size
- Hourly capacity (t/h)
- Feeding and discharge arrangement