Wuxi Taixian Powder Technology Co., Ltd.

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MIXING

VCH Series High-Shear Conical Mixer

The VCH Series is a dry-process single-vessel modification system for high-shear powder mixing, surface coating, and particle spheroidization. A bladed central shaft rotates at tip speeds up to 35 m/s inside a sealed vertical conical chamber — cooling water jacket standard, optional spray nozzle for in-chamber liquid-phase treatment, proprietary pneumatic dome valve for clean discharge. Effective capacity scales from 1.5 L (lab) to 2000 L (production), with VC and VCD configurations extending coverage to 3750 L.

Specifications

VCH Series — Belt Drive, Tip Speed up to 35 m/s

Model Scale Total Chamber (L) Effective Volume (L) Power (kW)
VCH-2 Lab 3 ≤1.5 0.75
VCH-5 Lab 11.4 ≤4.8 5.5
VCH-30 Pilot 70 ≤30 7.5
VCH-50 Pilot 113 ≤50 15
VCH-100 Production 182 ≤100 11
VCH-200 Production 437 ≤200 30
VCH-500 Production 1179 ≤500 55
VCH-1000 Production 2164 ≤1000 110
VCH-2000 Production 3417 ≤2000 132

VC Series — Hard Gear Reducer (Flange-Mounted), Tip Speed up to 25 m/s

Model Scale Total Chamber (L) Effective Volume (L) Power (kW)
VC-500 Production 1179 ≤500 55
VC-1000 Production 2121 ≤1000 55
VC-1500 Production 3417 ≤1500 75
VC-2000 Production 4533 ≤2000 90

VCD Series — Frame-Free Compact Configuration, Tip Speed up to 25 m/s

Model Scale Total Chamber (L) Effective Volume (L) Power (kW)
VCD-200 Production 417 ≤200 15
VCD-500 Production 1179 ≤500 45
VCD-1000 Production 2121 ≤1000 45
VCD-1500 Production 3417 ≤1500 75
VCD-2000 Production 4533 ≤2000 90
VCD-3750 Production 7427 ≤3750 90

Operating Principle

VCH Series cross-section showing sealed vertical conical chamber, bladed central shaft, spindle steering, material circulation flow, cooling water jacket, and optional spray nozzle
VCH Series —
sealed vertical conical chamber with high-speed bladed central shaft,
cooling water jacket (standard),
and optional spray modification nozzle

A bladed central shaft rotates at tip speeds up to 35 m/s inside the sealed vertical conical chamber. The shaft and conical vessel wall work together to drive material upward from the bottom — on reaching the top of the chamber, material falls back under gravity and re-enters the circulation. Impact, friction, and shear act on all particle surfaces with each pass.

Product discharges through a proprietary pneumatic dome valve — sealed, zero powder leakage, no vessel disassembly required. A cooling water jacket maintains precise process temperature throughout the batch. Tip speed is adjustable via inverter across the full operating range.

Processing Modes

  1. High-Shear Mixing — host and additive powders are homogenized through continuous circulatory flow driven by the high-speed bladed shaft. No solvent, no thermal treatment required. Uniform distribution confirmed within 10 mins processing time.
  2. Surface Coating — a dense, uniform coating layer is built up on host particles through high-shear contact with guest coating material inside the sealed chamber. Coverage is more continuous and complete versus conventional impact-force or shear-force methods. Optional spray nozzle enables in-chamber liquid-phase treatment.
  3. Spheroidization — irregular host particles are rounded through repeated mechanical impact and abrasion inside the sealed chamber. No binder required. Particle morphology change confirmed by SEM.
Schematic comparison of coating layer coverage: common impact force method (sparse), common shear force method (partial), and VCH mixing and coating method (dense, continuous)
Coating coverage comparison —
common impact force (left): sparse;
common shear force (center):
partial;
VCH mixing and coating (right): dense, continuous surface coverage

Key Features

  • Proprietary pneumatic dome valve standard—zero powder leakage, clean discharge without vessel disassembly
  • Cooling water jacket for precise process temperature control throughout the batch
  • WC-coated contact surfaces — metal contamination isolated from product
  • Single-vessel operation — mixing, coating, and spheroidization without material transfer between units
  • Optional spray nozzle for in-chamber liquid-phase surface treatment; solvent recovery system available
  • Tip speed adjustable via inverter — scalable process parameters from lab to production

Experiment Results

Graphite Spheroidization

Irregular natural graphite powder is processed into spheroidal particles in a single batch. No binder required. Potato-shaped morphology confirmed by SEM.

SEM images of natural graphite before VCH processing (irregular flake morphology) and after VCH processing (spheroidal potato-shaped particles)
Natural graphite —
before (left): irregular flake morphology;
after VCH processing (right): spheroidal particles confirmed by SEM

Surface Coating Comparison

VCH high-shear mixing produces a more complete and continuous coating layer than conventional impact-force or shear-force methods. Denser surface coverage confirmed by SEM cross-section.

Coating coverage comparison: common impact force layer (sparse), common shear force layer (partial), VCH mixing and coating layer (dense and continuous)

Carbon Toner Processing

Carbon toner powder is processed for pre-mixing, morphology modification, and surface coating before extrusion. All three steps completed in a single vessel. Particle shape and coating confirmed by SEM.

SEM image of carbon toner particles after VCH processing showing modified particle morphology and surface coating
Carbon toner after VCH processing— modified particle morphology and surface coating confirmed by SEM

Powder Mixing Uniformity

A two-component powder blend reaches uniform distribution within 10 min. No agglomeration observed after processing.

Powder mixing before and after: left shows unmixed two-component powder, right shows uniform blended powder after 10 minutes in VCH
Mixing uniformity —
before (left): unmixed two-component powder;
after 10 min in VCH (right): uniform distribution confirmed

Applications

    01. Lithium Battery Anode Materials

    Graphite spheroidization for improved packing density and electrochemical performance.

    02. Battery Cathode & Composite Powders

    Pre-mixing, coating, and surface treatment of active materials.

    03. Magnetic Materials

    Mixing and dry surface modification of NdFeB and bonded magnet powders.

    04. Carbon-Based Materials

    Morphology control and coating of carbon black, toner, and graphite materials.

    05. Pharmaceuticals

    Dry blending of active ingredients and functional excipients.

    06. Advanced Ceramics

    Particle engineering and surface treatment of oxide and non-oxide ceramic powders.

    Enquiry

    Tell us your material, target particle size, and throughput. We will advise on
    model selection and run a trial on your own powder before you commit to equipment.

    Yibin Andy Wei — Application Engineer
    Email: [email protected]
    LinkedIn: Yibin Andy Wei
    WhatsApp: +1 380 900 2442

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