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Release time：2026-07-09 Visits：1
Jiangxi Province is a major kaolin-producing region in China, and a local mining company plans to develop a newly discovered kaolin deposit. The deposit contains significant amounts of associated hard host rock; the ore grade is moderate, making it suitable for the production of ceramics, refractory materials, and chemical raw materials.
Core Project Requirements: To separate kaolin raw material from the run-of-mine (ROM) ore while simultaneously utilizing the associated rock to produce construction aggregates, thereby achieving a comprehensive development model of "multi-purpose mining and multi-product output." The design capacity requirement is 210 tons per hour.
The ore composition of the deposit is complex, with the following key characteristics:
Kaolin content: Approximately 35–45%, distributed in layers within the ore body.
Associated rock: Hard host rocks such as quartzite and feldspar rock; Mohs hardness of 6–7.
ROM particle size: 600 mm.
Clay content: Moderate; requires separation after crushing.
If only kaolin were extracted from this composite deposit while discarding the rock, it would not only waste resources but also increase tailings disposal costs. The client sought a solution to utilize both the kaolin and the rock separately.
Following site surveys and material analysis, the SUHMAN technical team tailored a tracked mobile crushing and screening production line for the client:
Stage 1: Primary Crushing (Jaw Crusher)
A vibrating feeder evenly feeds the 600 mm ROM ore into the SE-1060 mobile jaw crusher. The jaw crusher features a deep-cavity design and a high reduction ratio, crushing the ROM to under 150 mm in a single pass. At this stage, the kaolin and host rock begin to undergo preliminary liberation.
Stage 2: Secondary/Fine Crushing (Cone Crusher)
Material discharged from the jaw crusher enters the SY-HP300 multi-cylinder cone crusher. Utilizing the principle of inter-particle (lamination) crushing, the cone crusher efficiently crushes the hard host rock while minimizing the over-pulverization of the kaolin. Material crushed to below 40 mm then proceeds to the screening stage.
Stage 3: Screening and Separation
The SS-7018 mobile inclined screening station is equipped with a triple-deck screen to separate materials by particle size:
l 0–5 mm: Fine-grained kaolin raw material; collected directly for use in ceramics and refractory material production.
l 5–10 mm: Medium-grained kaolin raw material; used after further grinding.
l 10–20 mm / 20–35 mm: Construction aggregates; supplied to commercial ready-mix concrete plants.
l >35 mm: Returned to the cone crusher for further crushing, creating a closed-loop circuit.
1. Maximized Resource Utilization
Traditional kaolin mining often extracts only the target mineral while discarding large amounts of surrounding rock. This solution uses crushing and screening to convert associated rock into construction aggregates, raising resource utilization from under 50% to over 90%.
2. Multiplied Economic Benefits
Kaolin raw material: Commands a high market price as a base material for ceramics and refractories.
Construction aggregates: 0–5 mm manufactured sand and 10–35 mm crushed stone supplied to local infrastructure projects.
One production line, two revenue streams—significantly shortening the investment payback period.
3. Reduced Environmental Impact
Lower tailings volume means:
Reduced land footprint for tailings ponds.
Lower dust and wastewater emissions.
Reduced mine reclamation costs.
4. Flexible Mobile Configuration
Crawler-mounted equipment requires no foundation construction and can be repositioned flexibly to follow the ore body. For mining companies operating at multiple sites, the equipment is reusable, avoiding the waste of fixed assets.
After commissioning, the production line achieved an actual operating capacity of 210–230 tons per hour. Testing confirmed that the kaolin raw material met ceramic-grade standards for Al₂O₃ content, while the rock aggregates featured uniform particle shapes that complied with national standards for concrete-grade crushed stone. The client highly endorsed this "multi-purpose" comprehensive development model.
SUHMAN crawler-mounted mobile crushing and screening equipment is manufactured to military-grade quality standards; flexible and efficient, it is ideal for the comprehensive development of various complex ore types. Whether dealing with kaolin, bentonite, limestone, or other complex mineral deposits, we can provide tailored crushing and screening solutions.