CONE CRUSHERS | GELEN

A cone crusher is a compression-type crusher designed to reduce rock and ore into progressively smaller sizes in secondary and tertiary crushing stages. Unlike jaw crushers, which use a flat plate to squeeze material, a cone crusher operates by gyrating an inner cone (mantle) inside a fixed outer bowl (concave). As material enters the top of the crushing chamber, the eccentric rotation of the cone creates a compression action — material is squeezed between the mantle and concave, breaking along its natural fracture lines. Crushed material falls through the narrowing gap and exits at the bottom.

The key measurement in cone crusher operation is the Closed Side Setting (CSS) — the smallest gap between the mantle and concave at the bottom of the crushing stroke. CSS directly controls your product's maximum output size. For example, a 12 mm CSS on a GHC Series crusher will produce material with 80% passing approximately 14–18 mm, depending on feed gradation and material hardness.

Cone crushers excel in secondary and tertiary crushing because they produce a consistent, cubical product shape — critical for asphalt, concrete, and road base applications where particle shape directly affects mix performance. Because the crushing is continuous (unlike the reciprocating action of a jaw crusher), cone crushers deliver high throughput with even wear distribution across the chamber liners.

Modern hydraulic cone crushers, like the GELEN GHC Series, add a hydraulic setting system that allows the CSS to be adjusted under load without stopping the crusher. This capability maintains product specification as liners wear down, and the same system provides automatic overload protection — if an uncrushable object enters the chamber, the hydraulic system momentarily opens the CSS to pass it safely, then resets.

In a typical multi-stage crushing plant, a cone crusher follows a primary jaw crusher. The jaw crusher reduces run-of-mine material from 600–1,000 mm to 80–150 mm, and the cone crusher then takes this material and reduces it to 6–50 mm depending on the application. A tertiary cone crusher or VSI may follow to produce final specification products. GELEN GHC Series cone crushers are available in four models — GHC28, GHC37, GHC45, and GHC56 — covering capacities from 25 to 600 mtph, with full hydraulic CSS control across all models.

Cone crushers are classified by both their mechanical design and the crushing application they serve. Understanding the differences helps you select the right machine for your material and output requirements.

Standard Cone Crusher — Designed primarily for secondary crushing, the standard cone has a wider feed opening and a larger CSS range, typically 10–50 mm. It accepts material directly from a jaw crusher (typically 80–220 mm feed) and reduces it to 25–60 mm. The standard head geometry creates a longer crushing path, which improves reduction ratio for coarser feed materials. This is the right choice when your plant receives run-of-crusher material at 80–200 mm and needs to produce 20–50 mm output for a tertiary stage or final screen.

Short Head Cone Crusher — The short head version is optimized for tertiary crushing and fine material production. It has a steeper head angle and a smaller feed opening (typically 35–130 mm), producing output as fine as 6–10 mm CSS. If your process requires material finer than 20 mm — for manufactured sand, asphalt aggregate, or fine railway ballast — a short head cone is the right choice for the final crushing stage. Short head performance is particularly sensitive to feed gradation: choke-feeding a short head with oversize material will cause overload and excessive wear.

Hydraulic Cone Crusher — The modern standard for secondary and tertiary applications. Instead of a spring-loaded relief system, a hydraulic cone uses an oil-hydraulic circuit to control CSS, provide overload protection, and enable rapid clearing of the crushing chamber after a bowl pack. The GELEN GHC Series uses a fully hydraulic system, which eliminates the need for shim adjustment, reduces maintenance time, and allows CSS changes during operation — critical for maintaining product specification without production stops.

Spring Cone Crusher — An older design that uses a spring assembly around the outer frame to provide tramp iron protection. Spring cones are still in service in many quarries but require more manual intervention for CSS adjustment (physical shim plates) and have higher maintenance requirements than hydraulic equivalents. They are generally not recommended for new plant installations.

Gyratory Crusher — Often confused with cone crushers, gyratory crushers are primary machines designed for very large feed sizes (600–1,200 mm) and high throughputs (1,000–5,000 tph). They share the cone-inside-bowl geometry but operate at a completely different scale and are not used in secondary or tertiary applications.

For most aggregate and mining operations today, a hydraulic cone crusher — standard head or Extra Coarse (EC) chamber for secondary, Fine (F) chamber for tertiary — is the optimal choice. The GELEN GHC Series covers both applications through its interchangeable chamber (concave) system.

Cone crushers are the preferred secondary and tertiary crushing machine for aggregate producers, mining operations, and recycling plants worldwide. Here is why they outperform alternatives in the right application:

1. Superior Particle Shape
Because cone crushers use a compression-and-release action with a gyrating motion, material is crushed from multiple angles rather than in a single plane. This produces a cubical, well-shaped particle — essential for asphalt concrete, which requires angular aggregate for mix stability, and for concrete production, where cubical particles reduce water demand and improve compressive strength. A jaw crusher's flat compression action tends to produce flaky particles that often require additional shaping stages.

2. High Reduction Ratio
A cone crusher can achieve a 6:1 to 8:1 reduction ratio, meaning a 120 mm feed can be reduced to 15–20 mm in a single pass. This high ratio reduces the number of crushing stages needed and lowers total plant capital expenditure and operational complexity.

3. Automatic Overload Protection
Modern hydraulic cone crushers automatically relieve the CSS when an uncrushable object (tramp iron, steel bolts, drill bits) enters the chamber. The hydraulic system opens and closes the gap automatically within seconds, preventing catastrophic liner or shaft damage. This is particularly valuable in recycling and mining applications where contamination in the feed is common.

4. CSS Adjustment Without Shutdown
As liners wear, effective CSS increases and product gradually becomes coarser. The hydraulic system on GHC Series crushers allows operators to compensate by tightening the CSS while running at full production — maintaining specification without interrupting output. This is impossible with mechanical shim adjustment on older spring cone designs.

5. Multiple Chamber Configurations
Fine (F), Medium (M), and Extra Coarse (EC) concave profiles let you match the crushing geometry to your material and output specification. GELEN GHC liners are manufactured from 14Mn and 18Mn manganese steel grades — choosing the right alloy for your material hardness can extend liner life by 30–50% compared to a generic selection.

6. Low Operating Cost Per Ton
At scale (150+ mtph), the cone crusher's energy consumption per ton produced is lower than impact crushers for hard abrasive materials. Liner wear costs are predictable and manageable, and the GHC hydraulic system reduces maintenance labor compared to mechanical adjustment designs.

Selecting a cone crusher involves matching the machine's capabilities to your material, circuit design, and final product specification. Here is a systematic approach:

Step 1: Identify your feed material
Material hardness (Mohs scale or compressive strength in MPa), abrasiveness (silica content), and moisture content all affect crusher selection. Limestone (soft, 2–3 Mohs) allows higher throughput and longer liner life than granite or basalt (hard, 6–7 Mohs), which require a harder liner alloy (18Mn vs. 14Mn) and may reduce capacity by 20–30% compared to soft rock at the same CSS.

Step 2: Determine your target CSS and output gradation
What is your final product specification? For asphalt aggregate, a typical CSS of 8–14 mm produces a 0–16 mm gradation suitable for most asphalt mix designs. For road base material, a CSS of 20–38 mm is typical. For concrete coarse aggregate (10–20 mm finished size), a CSS of 12–20 mm is standard. The GHC Series covers CSS from 6 mm (GHC28, Fine chamber) to 50 mm (GHC56, Extra Coarse chamber).

Step 3: Match capacity to your plant throughput
Cone crushers are rated by capacity at a specific CSS and feed gradation. A GHC45 at 12 mm CSS on granite produces approximately 80–150 mtph; the same machine on limestone at 20 mm CSS may produce 200–280 mtph. Always size the cone crusher 15–20% above your target throughput to allow for feed gradation variation, seasonal feed moisture changes, and liner wear over the service cycle.

Step 4: Choose the right chamber (liner profile)
Fine (F) liners suit tertiary crushing and fine aggregate production (CSS 6–20 mm). Medium (M) liners suit most secondary applications where feed is 50–150 mm and product is 15–40 mm. Extra Coarse (EC) liners are used when feed is coarse (up to 220 mm on GHC45) and output specification allows a wider gradation. Matching the chamber profile to your application can increase production by 15–25% and extend liner life compared to using a mismatched profile.

Step 5: Decide between stationary and mobile configuration
A stationary cone crusher in a fixed plant offers the lowest cost per ton at high throughputs (300+ mtph) but requires civil works and a permanent installation. A mobile (tracked) cone crusher is right for quarries requiring relocation between faces, short-term contract crushing operations, remote sites with poor infrastructure access, or when capital investment must remain mobile. GHC Series models are compatible with both configurations.

Contact our engineering team with your feed material, feed size, required output specification, and target capacity — we will recommend the right GHC model, chamber profile, and circuit configuration for your operation.