Material: Mineral Powder (Iron ore fines, Manganese, Fluorite, or Chrome powder)
Process: Cold-Pressing Briquetting Line
Output: High-density oval/pillow briquettes for smelting furnace charging
The process begins with the precise conditioning of the raw mineral fines. Raw powder, typically <3mm, is introduced into a Mixer. At this stage, specialized binders (such as bentonite, liquid polymer, or lime) are metered into the chamber.
The mixer’s synchronized paddles ensure that the binder is distributed at the molecular level, coating each mineral particle. This “homogenization” is critical; without uniform binder distribution, the resulting briquettes will lack the “drop strength” required for bulk handling and transport.
The conditioned mixture is conveyed to the Mineral Ball Press Machine. To ensure the cavities are fully loaded, a vertical screw force-feeder is utilized to degas the material before it reaches the rollers.
Mechanical Logic: The material is compressed between two counter-rotating rollers manufactured from 9Cr2Mo or 65Mn alloy steel.
Hydraulic Tonnage: A heavy-duty hydraulic station provides constant pressure, forcing the particles to bond into a solid mass. This “cold-pressing” technology preserves the chemical purity of the mineral while achieving a density of ≥2.2 g/cm³.
A briquette press is a single component in a larger recovery ecosystem:
Upstream: If raw mineral fines are too wet (>12% moisture), they must first pass through a Rotary Drum Dryer to reach the optimal pressing moisture.
Downstream: Freshly pressed briquettes containing liquid binders are transitioned to a Mesh Belt Dryer. This dehydration stage hardens the internal bonds, ensuring the briquettes do not crumble when stacked in deep-bed smelting furnaces.
Roller Durability: High-manganese alloy liners for abrasive mineral contact.
Briquette Shape: Optimized for furnace airflow (standard 40mm–60mm pillow or oval).
Qualification Rate:≥95% (high-precision roller alignment reduces fines recirculation).
Q1: What is the optimal binder ratio for mineral powder?
A: This depends entirely on the mineral’s silica content and particle size. Generally, a 3%～5% liquid binder or a 2%～3% powder binder is sufficient. We provide specialized testing to find the minimum binder threshold to maintain high smelting purity.
Q2: How do you prevent the material from sticking to the roller molds?
A: We use precision-machined “clean-release” mold cavities. For particularly sticky minerals, we can integrate a mechanical scraper or use specialized alloy coatings on the roller surface to ensure consistent discharge.
Q3: Can these briquettes be charged directly into a blast furnace?
A: Yes. By achieving a high “cold-crushing strength” (CCS) during the pressing and drying stages, the briquettes can withstand the weight of the furnace burden without breaking into dust.
[Submit Your Mineral Powder Specs for a Tonnage & Compression Ratio Analysis]
