Lvlon makes fine crushing equipment in Henan, China. The 2PC double rotor crusher series processes wet limestone, cement clinker, coal slag and other materials at moisture levels that would shut down a conventional hammer mill. In-house steel fabrication and rotor balancing. Factory-direct pricing. OEM on motor power, voltage and hammer material.
No Screen Means Nothing to Clog
A conventional hammer crusher has a curved screen plate under the rotor. The hammers strike the material and throw it against the screen. Particles small enough to pass through the screen holes fall through. Particles that are still too large bounce back into the hammer path for another strike. The screen is both a sizing device and a choke point.
Feed the crusher dry limestone and the screen works. Feed it wet limestone at 15% moisture and the fines start packing into the screen holes. One hole blinds. Then the adjacent holes. The effective open area shrinks. Throughput drops. The operator notices the ammeter climbing and the discharge thinning. Within 30–60 minutes, the screen is fully blinded and the crusher must stop for manual cleaning. In a cement plant during the rainy season, this cycle repeats every hour.
The 2PC has no screen. The product size is set by the gap between the hammer tips and the toothed crushing plates mounted on the chamber walls. The gap is the maximum particle size that can pass. Material larger than the gap stays in the hammer zone and gets struck again. Material smaller than the gap drops through. No perforated plate. No holes to blind. No surface for wet fines to cake onto. The crusher processes material at 30% moisture-material that is visibly wet, material that has just been pulled from a water-quenched slag pit-without slowing down.
Two Rotors: One Machine, Two Stages
The upper rotor runs at a moderate speed with heavier hammers. It receives the feed at up to 200 millimeters and reduces it to mid-size fragments through impact. The fragments fall into the lower rotor chamber. The lower rotor runs at a higher speed with more hammers, more densely spaced. It grinds the mid-size fragments down to the final product size through repeated impact and attrition against the toothed plates.
This is the equivalent of a primary crusher and a secondary crusher inside one housing. A conventional circuit for the same feed-to-product reduction would require a jaw crusher feeding a cone crusher or an impact crusher. The 2PC does it in one pass through one machine.
Adjustable Hammers: Triple the Wear Life
The hammers are a two-piece design-a hammer head bolted to a hammer arm. Only the head wears. The arm is permanent. When the hammer tip wears down from repeated impact, the gap between the tip and the crushing plate increases. Product size drifts upward. A conventional fixed hammer must be replaced at this point-the entire hammer, head and shaft together.
On the 2PC, the operator loosens the retaining bolts, slides the hammer head outward along the arm, re-tightens. The gap returns to the set dimension. Product size returns to specification. The same hammer head continues in service. This adjustment is repeated several times over the life of the hammer before the head is worn to the point where replacement is needed. Total service life from a single hammer head reaches roughly three times that of a fixed-position hammer.
Combine this with reversible rotation-switch the motor direction on a scheduled cycle, and the hammers wear evenly on both faces. The crushing plates wear evenly on both sides. No single face takes all the abrasion. The maintenance interval stretches further.
Specifications
| Model | Feed | Output | Capacity | Power | Dimensions (mm) |
|---|---|---|---|---|---|
| 2PC600×400 | ≤100 | ≤3 | 15–25 | 2×22 | 2,350×926×1,630 |
| 2PC800×600 | ≤100 | ≤3 | 45–60 | 2×55 | 3,300×1,250×1,730 |
| 2PC1000×800 | ≤120 | ≤3 | 50–70 | 2×90 | 5,650×2,067×2,766 |
| 2PC1000×1200 | ≤130 | ≤3 | 80–100 | 2×110 | 5,650×2,419×2,765 |
| 2PC1200×1400 | ≤150 | ≤3 | 100–120 | 2×160 | 5,900×2,660×2,790 |
| 2PC1400×1600 | ≤180 | ≤3 | 120–180 | 2×250 | 6,000×2,880×4,600 |
| 2PC1600×2000 | ≤200 | ≤3 | 200–250 | 2×400 | 7,400×3,500×4,266 |
Output gradation: ≤3 mm, roughly 50% at 0.5–0.075 mm, 35% at 0.6–2 mm, 15% at 2–3 mm. All models: no-screen design, two-stage rotors, reversible rotation, adjustable hammer gap, 1-year warranty. OEM on power, voltage and hammer material.
FAQ
Q: Does the machine really not clog with wet material?
No screen means nothing to blind. The product exits through the gap between the hammers and the crushing plates-an open space, not a perforated surface. A cement plant running wet limestone at 15–25% moisture through a 2PC crusher runs continuously through the rainy season while a conventional hammer mill at the same plant is being cleaned every 30–60 minutes.
Q: Double rotor or impact crusher-which one?
Impact crusher: dry, medium-hard material (limestone, dolomite). Produces cubical aggregate at 5–50 mm. Clogs with wet feed. Double rotor: any moisture content. Produces fine output at 3 mm and below-roughly half under 0.5 mm. Particle shape is not cubical-this is a fine crusher, not an aggregate shaper. Choose based on moisture and product size target.
Q: How does hammer adjustment work?
Loosen the retaining bolts. Slide the hammer head outward along the arm. Tighten. The gap between the hammer tip and the crushing plate returns to spec. One person with a wrench, roughly one to two hours for a full set of hammers. Each adjustment cycle extends hammer life. Total service life reaches roughly 3× that of non-adjustable hammers.
Contact Lvlon for model selection, material testing and factory quotation.
