High Purity Quartz

High Purity Quartz

ANZAPLAN is well equipped to develop flowsheet and process design capable of obtaining high purity quartz (HPQ) products. ANZAPLAN employs various physical, chemical and thermal processes including comminution, sensor-based sorting, flotation, dry or wet magnetic separation, calcination, leaching and hot chlorination to define the ultimate quartz quality.

ANZAPLAN has developed unique experience to design flowsheets tailored to remove impurities at trace levels meeting even the most stringent customer requirements with applications in several high-tech industries: semiconductors, microelectronics, telecommunication and optics, high temperature lamp tubing, telecommunication and optics, microelectronics, and solar silicon applications.

ANZAPLAN’s network within the demanding industry sectors will support the introduction of final quartz product samples to potential quartz consumers.

Services

Main analytical services for HPQ include:

  • Detailed identification of mineral and fluid inclusions
  • Inductively coupled plasma spectroscopy (ICP) using contamination free digestion developed in-house specifically for HPQ
  • Identification of ionic species by ion chromatography (IC)
  • Identification of main elements by X-ray fluorescence (XRF) 
  • Particle size distribution (PSD)
  • Determination of specific surface area (BET)
  • Optical analysis by scanning electron microscopy (SEM)
  • Electric conductivity analysis

Processing steps in the development of a flowsheet targeting the separation of impurities in order to achieve ultimate quality will involve physical, chemical and thermal processing steps.

Main physical processing steps applied:

  • Crushing, grinding and classification of ROM
  • Autogenous grinding
  • Sensor based sorting (SBS)
  • Attrition scrubbing and desliming
  • Electrostatics
  • Magnetic separation 
  • Flotation 

Main thermal and chemical processing steps applied:

  • Acid leaching including HF
  • Hot chlorination
  • High purity thermal treatment of +1750°C

Advanced processing services include:

  • Flowsheet optimization 
  • Locked cycle tests (LCT)
  • Variability testing

Physical, thermal and chemical processing will include the separation of impurities in order to achieve an HPQ product at pilot scale.

Main physical processing steps applied:

  • Crushing, grinding and classification of ROM
  • Autogenous grinding
  • Sensor based sorting (SBS)
  • Attrition scrubbing and desliming
  • Electrostatic separation
  • Magnetic separation 
  • Flotation

Main thermal and chemical processing steps applied:

  • Acid leaching including HF
  • Hot chlorination
  • Treatment of +1750°C

Engineering services typically include:

  • Process design and flowsheet development
  • Confirmation of flowsheet through pilot plant testing program
  • Mass balance, energy and chemicals requirements
  • Capital and operating cost estimates (CAPEX/OPEX)
  • Economic assessments including potential by-product scenarios.
  • Scoping, pre-feasibility and feasibility studies
  • Process plant revamping and plant audits
  • Optimization and trade-off studies 
  • Waste management

The ANZAPLAN team offers independent review and sign-off of technical studies including:

  • Preliminary economic assessment, pre-feasability and feasibility studies
  • Design verification at various scale
  • Pilot Plant review
  • Troubleshooting
  • Geometallurgical review
  • Periodic operation monitoring
  • Project management

ANZAPLAN and Micon International has formed a joint venture M.Plan International to provide consulting and testwork services for seamless development in specialty mineral and metal projects from grassroots exploration through to feasibility studies:

  • Exploration program advice 
  • Site visits
  • Mineral resource/reserve estimation
  • Verification of drilling and QA/QC protocols
  • Audit and review
  • Mine planning
  • Preparation of technical report based on international codes e.g. JORC, NI 43-101
  • Project valuation and studies (PEA, PFS and FS Level)
  • Independent Engineer