Featured Fused Quartz Products for Extreme Working Conditions
Fabricated from premium Donghai silica, delivering thermal stability up to 1200°C continuous operation and exceptional resistance to hot aggressive acid digestions.
Custom Clear Laboratory High Temperature Twin Tube
Customizable Fused Quartz Glass Bell Jar
Transparent High Pressure Pure Quartz Tube
High Temperature Fused Quartz Sheet for XRD
Transparent U-Bent Quartz Glass Tube
High Temperature Frosted Quartz Disc/Plate
Custom Quartz Glass Reactor Twin Tube
Custom U-Bent Quartz Spiral Condenser Tube
Why Erdenet's Hydrometallurgical & Assay Labs Require High-Purity Fused Quartz Boiling Flasks
Erdenet, situated in the Orkhon Valley of northern Mongolia, represents one of the planet's premier concentrations of porphyry copper-molybdenum mineralization. Driven by the colossal open-pit operations and multi-stage froth flotation plants of the Erdenet Mining Corporation (EMC), the city's geochemical testing centers, metallurgical assay facilities, and independent environmental laboratories execute thousands of aggressive wet acid digestions every single day.
Historically, laboratory operators relied heavily on standard Borosilicate 3.3 glassware for reflux digestion, solvent boiling, and Kjeldahl nitrogen estimations. However, the physical and chemical limitations of borosilicate have become a severe operational bottleneck in Erdenet's modernized analytical workflows. The digestion of chalcopyrite ($CuFeS_2$), bornite ($Cu_5FeS_4$), and molybdenite ($MoS_2$) demands sustained boiling in concentrated multi-acid matrices—specifically combinations of nitric ($HNO_3$), hydrochloric ($HCl$), hydrofluoric ($HF$), and perchloric ($HClO_4$) acids at thermal plate surface temperatures often exceeding 350°C to 450°C.
Lianyungang Zelvo Quartz Products Co., Ltd. supplies specialized custom OEM fused quartz boiling flasks (flat-bottom Florence flasks, round-bottom single/multi-neck distilling vessels, and bespoke digestion carboys) directly to the Erdenet mining corridor. Synthesized from natural high-purity crystalline quartz extracted from the Donghai mineral belt, our glassware possesses a near-zero linear coefficient of thermal expansion ($5.5 \times 10^{-7} \text{ K}^{-1}$), permitting seamless transitions from freezing storage (-35°C in Mongolian winters) to direct burner flame or red-hot ceramic heating mantles without preheating cycles.
| Physical / Chemical Property | Standard Borosilicate 3.3 | Zelvo 99.99% Fused Quartz |
|---|---|---|
| $SiO_2$ Purity Content | ~80 - 81% | ≥ 99.99% (Optical / High-Purity) |
| Thermal Expansion ($0-300^\circ\text{C}$) | $3.3 \times 10^{-6} \text{ K}^{-1}$ | $5.5 \times 10^{-7} \text{ K}^{-1}$ (~6x lower) |
| Continuous Operating Temp. | 450°C - 490°C | 1100°C (Short term up to 1300°C) |
| Strain Point / Softening Point | 510°C / 820°C | 1120°C / 1683°C |
| Trace Leaching ($B, Na, Al, Ca$) | High (Contaminates ICP-MS) | Negligible ($< 10\text{ ppb}$ blank levels) |
| Thermal Shock Threshold ($\Delta T$) | $\approx 150^\circ\text{C} - 180^\circ\text{C}$ | > 1000°C (Red-hot to ice water) |
| Acid Resistance (Boiling $HCl, HNO_3$) | Gradual surface etching | Completely inert (except conc. $HF$) |
Engineered for Erdenet's Toughest Geochemical & Chemical Environments
From copper concentrate assays to river basin runoff analyses, custom quartz boiling flasks deliver analytical integrity without vessel failure.
Porphyry Copper & Molybdenum Ore Acid Digestion
Assaying primary chalcopyrite and secondary chalcocite ore samples requires boiling finely pulverized drill-core pulp in four-acid cocktails ($HNO_3-HCl-HClO_4-HF$). Standard borosilicate vessels leach sodium and aluminum into the liquor, distorting subsequent atomic absorption spectrometry (AAS) and inductively coupled plasma optical emission spectroscopy (ICP-OES) evaluations. Zelvo fused quartz boiling flasks present total elemental inertia, giving Erdenet metallurgists ultra-pure spectral blanks and preventing devitrification under intense perchloric fuming.
Extreme Sub-Zero Thermal Shock Resistance
During severe winter months in Orkhon Province, outdoor temperatures frequently drop between -30°C and -40°C, causing substantial temperature gradients across unconditioned sample preparation holding areas. When technicians transfer cold aqueous solutions or geological slurries into boiling flasks seated directly on 400°C electric heating plates, borosilicate vessels frequently undergo catastrophic tensile stress failure. Our fused quartz glass has an extraordinarily low expansion coefficient, tolerating instantaneous 1000°C thermal shocks without stress fracturing.
SX-EW Electrolyte & Froth Flotation Reagent Assays
Erdenet's solvent extraction and electrowinning (SX-EW) processing lines require regular distillation and boiling characterization of organic extractants, kerosene diluents, and xanthate collector solutions. Fused quartz flat-bottom boiling flasks provide completely inert boiling environments unaffected by sulfurized organics or trace acid mists, preserving clean condensates and safeguarding critical quantitative vapor-phase balances.
Tailings Pond Runoff & Watershed Trace Analysis
Environmental monitoring programs around the Erdenet tailings dams and the neighboring Selenge-Orkhon river networks mandate trace detection of heavy metals down to parts-per-billion (ppb) thresholds. Fused quartz round-bottom distillation flasks allow ultra-pure sample pre-concentration without introducing exogenous boron, potassium, or silica, satisfying Mongolian MNS ISO/IEC 17025 testing standard accreditation protocols.
Custom Multi-Neck Pyrolysis & Vacuum Reflux
Advanced research programs at local Mongolian technical institutes and pilot metallurgical plants require non-standard boiling configurations—such as 2-neck and 3-neck boiling flasks fitted with ground quartz joints (standard taper 24/40, 29/32, or spherical ball joints) for simultaneous thermocouple probe immersion, inert nitrogen sparging, and reflux condenser coupling. Zelvo supplies custom dimensional geometries tailored directly to CAD engineering drawings.
Custom OEM Fused Quartz Boiling Flask Geometries
Fabricated with precision wall thickness uniformity to guarantee even thermal distribution across high-heat hot plates, heating mantles, and gas torches.
Flat-Bottom Fused Quartz Boiling Flasks (Florence Style)
Designed specifically for direct placement on laboratory ceramic hotplates and magnetic heating stirrers. Standard flat bases eliminate the need for ring stands, while uniform reinforced bottom thicknesses prevent local hotspot warping during intensive ore digestions. Available in volumetric sizes ranging from 50 mL, 100 mL, 250 mL, 500 mL, 1000 mL, up to 5000 mL bulk digestors.
Round-Bottom High-Vacuum Fused Quartz Flasks
Engineered with uniform spherical wall sections for optimal mechanical stress distribution under full vacuum and positive internal vapor pressures. Ideal for rotary evaporation, solvent recovery, and high-temperature vacuum sublimation assays. Available in single-neck, angled two-neck, and parallel three-neck orientations with flame-annealed standard taper joints.
Heavy-Wall Heavy-Duty Quartz Digestion Carboys
Tailored for mining production facilities running 24/7 automated robotic digestion systems. Equipped with heavy-duty rolled rims or screw-thread caps made from chemical fluoropolymer materials. Resists frequent mechanical shock from stainless steel robotic handling clamps and turbulent boiling agitation.
Modernizing Metallurgy: The Strategic Shift Across Orkhon Province Laboratories
The mining industry in Mongolia is advancing toward digitized, high-throughput assay automation. As international copper demand surges in support of global decarbonization, renewable power transmission, and electric vehicle battery infrastructure, operations throughout the Erdenet district are actively scaling their processing plant capacities and exploring deeper ore bodies with complex refractory metallurgy.
This operational evolution directly impacts procurement standards for testing consumables:
- Transition Away from Consumable Borosilicate: Mining labs are phasing out cheap borosilicate glassware that frequently breaks due to thermal stress and chemical leaching, causing costly testing reruns and sample contamination.
- Adoption of High-Density Acid Digestion: Automated heating blocks operating at temperatures above 300°C require vessels capable of surviving prolonged immersion in multi-acid fuming without clouding or surface pitting.
- Streamlined Direct Cross-Border Logistics: Mongolian mining procurement officers are bypassing multiple trading tiers, sourcing directly from specialized manufacturers located in China's quartz capital (Donghai / Lianyungang) via fast Sino-Mongolian rail freight lines through Erenhot to Erdenet.
Zelvo Quartz serves this regional transformation by providing end-to-end OEM customization with zero-defect quality assurance, competitive factory pricing, and full technical documentation for seamless customs clearance into Mongolia.
Logistical Precision into Erdenet, Mongolia
Transporting high-precision glassware across the continental interior of East Asia requires specialized packing protocols. Our Erdenet-bound quartz shipments undergo:
Flexible delivery terms: Direct Express (DHL/FedEx door-to-door), Air Freight via Ulaanbaatar (UBN), or consolidated rail carloads directly to Erdenet Freight Terminal.
Why Engineering Teams Choose Zelvo Quartz
Deep technical know-how from China's premier quartz cluster, backed by rigorous analytical inspection and responsive engineer-to-engineer support.
Epicenter of Global Quartz Raw Material
Headquartered in Donghai County, Jiangsu—widely recognized as China's "Crystal Capital"—Zelvo Quartz benefits from immediate access to the highest purity natural silica reserves. We maintain strict control over melting and refining processes, guaranteeing raw quartz glass with minimum 99.99% $SiO_2$ purity, low hydroxyl content, and virtually zero micro-bubble inclusions.
Drawing-Based Precision OEM Fabrication
Whether your laboratory requires standard Florence boiling flasks or custom digestion apparatus with complex sidearms, liquid sampling taps, or bespoke ground joint groundings, our master glassmakers and CNC operators can execute your exact 2D/3D CAD tolerances. Our capabilities include laser cutting, high-precision micro-hole drilling, robotic ultrasonic grooving, and controlled flame annealing.
Rapid Engineering Review (≤ 2 Hours)
Communication bottlenecks stall research and production. Zelvo Quartz provides an engineer-led inquiry desk where your technical drawings, chemical compatibility parameters, and volume inquiries receive actionable engineering evaluations and transparent price quotations within two hours during working days, backing an outstanding 37% customer reorder rate.
Strict Quality Control & Analytical Verification
Every single boiling flask and custom quartz component undergoes rigorous multi-step inspection before packaging: polariscope internal strain testing to eliminate residual thermal stress, optical wall-thickness laser micrometer logging, and rigorous dimensional tolerance checks. Batch Certificates of Analysis (COA) specifying trace impurity profiles are supplied with every order.
Flexible MOQ: Prototyping from 1 Piece
We eliminate punitive minimum order restrictions. Whether an Erdenet pilot testing plant requires a single bespoke three-neck boiling flask for a feasibility experiment or an assay center requires regular batch supplies of 500 flat-bottom digestion flasks, we offer an accommodating MOQ of 1 piece with full engineering support.
Full International Trade & Currency Coverage
We streamline international procurement with support for FOB, CFR, CIF, EXW, CIP, CPT, and DDP terms. We accept payments across multiple currencies including USD, EUR, CNY, and Mongolian Tugrik (MNT via verified banking channels), supporting T/T, L/C, PayPal, credit cards, and escrow transactions.
Frequently Asked Questions by Erdenet Procurement Teams
Clear, technical answers to common queries regarding chemical resistance, customization, lead times, and cross-border delivery into Orkhon Province.
How does fused quartz boiling flask performance compare when handling hydrofluoric acid (HF) mixes in Erdenet ore assays?
Can our assay laboratory provide non-standard custom drawings or replicate broken original equipment manufacturer (OEM) flasks?
What are the typical shipping routes, lead times, and customs procedures for deliveries into Erdenet, Mongolia?
1. Express Air Cargo: Routed via Ulaanbaatar Chinggis Khaan International Airport (UBN), followed by bonded domestic road delivery to Erdenet (Total transit time: 5-8 business days).
2. Cross-Border Rail Freight: Routed via the Lianyungang/Zhengzhou rail hubs through the Erenhot / Zamiin-Uud border crossing directly to the Erdenet rail terminal (Total transit time: 12-16 business days).
We supply complete commercial invoices, packing lists, HS code documentation (HS: 70171000 - Laboratory glassware of fused quartz or other fused silica), and Certificates of Origin to facilitate swift clearance through Mongolian Customs (GAST).
How does Zelvo Quartz prevent breakage during winter transit when parcels travel through sub-zero Mongolian regions?
What thermal heating protocols should be observed when using quartz boiling flasks on high-temperature heating mantles?
Can you provide joint groundings compatible with European (ISO) and American (ASTM) laboratory glassware?
• European Standard (DIN / ISO): 14/23, 19/26, 24/29, 29/32, 45/40.
• US Standard (ASTM E676): 14/20, 19/22, 24/40, 29/42, 34/45.
• Spherical Ball & Socket Joints: S13, S19, S29, S35.
All ground surfaces are flame-checked and vacuum-tested to ensure leak-free seal integrity when coupled with your existing condensers, adapters, and vacuum manifold systems in Erdenet.