How to Choose the Right Chamber for Sandvik CH870 Cone Crusher Liners?

•  
•  
• EC Extra‑Coarse: Largest feed opening, deep receiving zone, secondary crushing, big feed material, pursue maximum throughput
•  
• C Coarse: econdary / early‑tertiary, large‑medium feed size, high tonnage aggregate plant
•  
• MC Medium‑Coarse: MC Medium‑Coarse: Most‑popular general‑purpose cavity, balance of feed acceptance, capacity and product gradation
•  
• M Medium: Tertiary crushing, medium feed, produce well‑shaped 20‑31mm aggregates
•  
• MF Medium‑Fine: Fine tertiary, smaller CSS, cubical aggregate for concrete
•  
• F Fine: Pebble crushing & fine tertiary, limited feed size, small finished material
•  
• EF Extra‑Fine: Quaternary / pebble crushing, smallest allowable feed, ultra‑fine finished product
•  

Core Rules to Select CH870 Chamber

Match crushing stage

1. Secondary crushing: Select EC / C: handle large incoming run‑of‑mine or primary‑crushed rock

2. Tertiary crushing: Select MC / M / MF, most aggregate production lines

3. Pebble /quaternary: Select F / EF, strictly control max feed size entering chamber

Feed size rule

1. Maximum feed entering crusher should not exceed 80% of cavity nominal feed opening.

2. If oversized material keeps feeding into a fine cavity: frequent bridging, blockage, rapid one‑sided liner wear.

Closed‑Side Setting (CSS) matching

1. Each cavity has its minimum working CSS. Do NOT run CSS smaller than cavity minimum value.

2. Running too tight CSS on coarse cavity leads to packing, high power draw and drastically shorten liner lifespan.

Material hardness

1. Hard, abrasive rock (granite, basalt, iron ore): choose slightly coarser cavity, avoid over‑crushing inside chamber.

2. Soft rock (limestone): can run relatively fine cavity for good product shape.

Typical Field Mistakes

1. Use one cavity for all conditions: keep using EC cavity when feed size drops, output fine product with poor grain shape.

2. Run fine cavity with oversize feed: liners wear uneven, frequent downtime.

3. Ignore eccentric throw cooperation: cavity profile must work together with eccentric throw to get target tonnage.