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破碎机
CRU · Sample Preparation Equipment · 5 models
By Lab Manufacturers China Technical TeamLast reviewed Standards: ISO 3310-1, ASTM E11, ISO 2591-1
Crushers reduce large, hard lumps of rock, ore, clinker and similar material into smaller pieces for further milling. They use compression, impact or shear and are the first stage of size reduction in sample preparation.
5 models of Crushers
The 5 models below are current configurations; specifications are confirmed on quotation.
颚式破碎机
A jaw crusher breaks hard, brittle material between a fixed and a moving jaw. It is the standard first stage for rock, ore and clinker samples, giving a fairly uniform product with an adjustable gap.
辊式破碎机
A roll crusher reduces medium-hard, brittle material between two counter-rotating cylinders. It produces a relatively uniform product with limited dust and is used for ores, coal and minerals in routine laboratory sample preparation.
圆锥破碎机
A cone crusher reduces hard material by squeezing it in a gyrating chamber. It offers high throughput and an adjustable closed side setting, and suits larger laboratory and pilot scale preparation of hard ores.
锤式破碎机
A hammer crusher breaks material by rapid impacts from rotating hammers. It reaches high reduction ratios on soft to medium-hard, low-abrasion feed and is used for coal, limestone and similar samples in the laboratory.
反击式破碎机
An impact crusher breaks material by throwing it against rotating or fixed anvils using high-speed blow bars. It gives high reduction ratios and good product shape on medium-hard, low-abrasion feed in sample preparation.
| Model | Max feed size | Product size | Throughput | Gap adjustment | Motor power |
|---|---|---|---|---|---|
| Jaw CrusherCRU-0001 | 100 mm | 1–15 mm, adjustable | Up to 200 kg/h | Manual or motorised | 1.5–4 kW |
| Roll CrusherCRU-0002 | 30 mm | 0.5–5 mm, adjustable | Up to 300 kg/h | Manual, with scale | 1.1–3 kW |
| Cone CrusherCRU-0003 | 60 mm | 2–20 mm, adjustable | Up to 500 kg/h | — | 3–7.5 kW |
| Hammer CrusherCRU-0004 | 50 mm | 0.5–10 mm, grate dependent | Up to 400 kg/h | — | 1.5–5.5 kW |
| Impact CrusherCRU-0005 | 50 mm | 1–15 mm, adjustable | Up to 350 kg/h | — | 2.2–7.5 kW |
Indicative values for this product class. Final specifications are confirmed on the quotation and in the calibration documents supplied with the instrument.
Crushers apply mechanical forces that exceed the strength of the feed material, causing it to fracture. Jaw crushers press material between a fixed and a moving jaw, roll crushers draw it between counter-rotating cylinders, cone crushers squeeze it in a gyrating chamber, hammer crushers strike it with rotating hammers, and impact crushers break it against a rotating or fixed anvil. The reduction ratio, feed size and product size depend on the machine geometry, the gap setting and the material hardness. Crushing is normally the coarse stage that prepares feed for a mill, and over-crushing is avoided because fines can complicate later handling. Wear parts are made from hardened steel or manganese alloys to resist abrasion.
Choose a crusher according to the feed size, hardness and abrasiveness of the material and the required product size. Jaw crushers suit hard, brittle lumps and give a fairly uniform product with adjustable gap. Roll crushers suit medium-hard, brittle material and produce less dust. Cone crushers handle high throughput of hard material. Hammer and impact crushers suit softer, less abrasive materials and give higher reduction ratios. Confirm that the feed opening accepts the largest pieces, that the reduction ratio matches the required downstream size, and that the crushing chamber and wear parts suit the abrasiveness. Consider dust control, sample representativeness and cleaning between samples.
Crushers are specified in mining and ore sample preparation, cement and clinker analysis, geological and soil sample reduction and ceramic and glass raw material preparation.
Work with Crushers is commonly governed by ISO 3310-1, ASTM E11, ISO 2591-1, IEC 61010-1 and ISO 6497. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
Install crushers on a firm floor with the necessary electrical protection and, where required, dust extraction and noise enclosure. Do not exceed the rated feed size, since oversized pieces can jam the machine or damage the jaws. Feed material gradually and avoid running the crusher empty for long periods. Check and replace wear parts on schedule, and clean thoroughly between samples to avoid cross-contamination, using a blank or quartz flush where trace analysis demands it. Follow lock-out procedures during maintenance and guard all moving parts.
Crushing is the coarse stage that breaks large lumps into smaller pieces, typically down to a few millimetres, using compression or impact. Milling is the finer stage that reduces material to powder, often below one millimetre, using impact, friction or cutting. Crushers protect mills from oversized feed.
A jaw crusher is the usual choice for hard, brittle rock because it applies high compression force and tolerates abrasive material. A cone crusher handles higher throughput of hard material, while roll crushers suit medium-hard brittle samples where less dust is preferred.
Wear parts should be chosen to avoid introducing the elements being analyzed, and the chamber is cleaned or flushed between samples. For trace work, a quartz or other inert flush may be crushed and discarded first. Recording cleaning procedures in the method supports reproducibility.
Laboratory jaw crushers typically accept feed up to about 50 to 100 mm and reduce it to a few millimetres, depending on the model and gap setting. Larger pieces must be broken first. Always check the rated maximum feed size against the actual sample.
