Na₃AlF₆ Cryolite
Aluminium Cryolite Na3alf6 Mineral Price for Sale is Used for Chemical Engineering Field
Product Name: Sodium Fluoroaluminate, Cryolite, Sodium Hexafluoroaluminate
CAS No.: 15096-52-3
EINECS No.: 239-180-3
Molecular Formula: Na₃AlF₆
Molecular Weight: 209.94
Hazard Identification Number: 61513
UN Number: 3288
Hazard Classification: Class 6.1 Toxic Substances
Product Classification(By Molecular Ratio): High Ratio (NaF/AlF₃ > 2.2), Low Ratio (1.8-2.2)
Product Classification(By Form): Sand, Granular, Powder
Product Classification(By Purity): Standard, Ultra-Pure
Na₃AlF₆ Cryolite
I. Physicochemical Properties
-
Appearance: White fine crystals or powder, no distinct odor. Some granular products appear translucent. Hygroscopic, tends to agglomerate upon moisture absorption.
-
Key Physical Parameters:
• Relative Density (water = 1): Approx. 3.0 g/cm³
• Melting Point: 1009°C
• Hardness (Mohs): Grade 2-3
• Solubility: Slightly soluble in water (aqueous solution neutral); insoluble in ethanol, acetone and other organic solvents; slowly decomposes in hydrochloric acid. -
Chemical Stability: Stable under normal temperature and pressure. Dissolves alumina at high temperatures to form a low-melting-point electrolyte system. Reacts with strong acids releasing hydrogen fluoride gas. Non-flammable, non-explosive, no vigorous reaction risk with alkali metals.
II. Core Production Processes
Primary processes classified by fluorine source:
| Process Type | Raw Materials | Key Steps | Product Characteristics |
|---|---|---|---|
| Fluorspar Method | Fluorspar (CaF₂), Sulfuric Acid, Aluminium Hydroxide/Sodium Aluminate | Acid digestion to HF → Dry/Wet synthesis → Separation & Purification → Drying & Granulation | Wet: Mature process but higher pollution, lower purity; Dry: High purity, better environmental performance |
| Phosphate Fertilizer By-product Method | By-product fluosilicic acid/sodium silicofluoride, Ammonia, Sodium Aluminate | Fluoride solution purification → Reaction with sodium aluminate → Precipitation & Separation → Drying → Co-production of white carbon black | High molecular ratio (2.7-3.0), high purity, mother liquor recyclable, high resource utilization |
III. Quality Standards (Complies with GB/T 4291-2021)
| Test Parameter | Premium Grade (Sand/Granular) | First Grade (Sand/Granular) | Regular Grade (Powder) | Unit |
|---|---|---|---|---|
| Fluorine (F) ≥ | 53.0 | 52.0 | 50.0 | % |
| Aluminum (Al) ≥ | 12.0 | 11.5 | 10.5 | % |
| Sodium (Na) ≤ | 32.0 | 33.0 | 34.0 | % |
| SiO₂ ≤ | 0.20 | 0.30 | 0.50 | % |
| Fe₂O₃ ≤ | 0.05 | 0.10 | 0.20 | % |
| P₂O₅ ≤ | 0.02 | 0.03 | 0.05 | % |
| Loss on Ignition (550°C) ≤ | 1.00 | 1.50 | 3.00 | % |
| Moisture (H₂O) ≤ | 0.50 | 0.80 | 1.20 | % |
IV. Main Application Fields
-
Primary Aluminum Smelting (Core application, ~85%): Essential flux for alumina electrolysis, reducing melting point from ~2050°C to ~950°C while regulating bath ratio and enhancing conductivity. High-ratio cryolite is industry preferred due to environmental and economic advantages.
-
Abrasive & Building Materials: Wear-resistant filler in grinding wheels and abrasives (extends service life >30%); opacifier in glass, enamel opacifying agent, improving optical and mechanical properties.
-
Metallurgy & Chemical Industry: Flux for ferrous alloy and rimmed steel smelting; casting deoxidizer; catalyst for olefin polymerization; flux for non-ferrous metal welding.
-
Other Uses: Raw material for agricultural pesticides; filler in ceramics; component of anti-reflection coatings for glass.
V. Safety & Protection Guidelines
(I) Hazard Overview
• Health Hazard: Moderately toxic (rat oral LD₅₀ ≈2000mg/kg). Prolonged dust inhalation may cause skeletal fluorosis, dental fluorosis; skin contact may lead to dryness/cracking; ingestion irritates digestive mucosa.
• Environmental Hazard: Risks water and soil pollution; fluoride ions can accumulate, affecting aquatic life.
• Reaction Risk: Non-flammable; reacts with strong acids releasing toxic HF gas; decomposes at high temperatures producing irritating fumes.
(II) Handling & Storage
-
Operations: Enclosed operations with local exhaust ventilation. Operators must wear N95 dust masks, chemical safety goggles, acid/alkali-resistant clothing, and nitrile gloves. Minimize dust generation; keep away from strong acids.
-
Storage: Cool, dry warehouse (temperature ≤30°C, relative humidity ≤75%). Sealed, moisture-proof packaging. Separate from acids and food additives. Store ≥10m from heat sources with moisture-proof barriers.
(III) Emergency Measures
• Spill Response: Isolate area, restrict entry. Personnel wear protective clothing and dust masks. Collect spillage with clean, dry shovel into sealed containers for professional disposal.
• First Aid:
-
Skin: Remove contaminated clothing, flush with flowing water for 10 min
-
Eyes: Lift eyelids, irrigate with saline for 15 min, seek immediate medical care
-
Inhalation: Move to fresh air, ensure airway patency, administer oxygen if needed
-
Ingestion: Drink milk or egg white to protect gastric mucosa, seek immediate medical attention
• Firefighting: Use water spray to cool containers/equipment; avoid direct water stream onto material. Firefighters should operate upwind wearing full-face respirators.
(IV) Transportation
• Packed in woven bags with inner plastic liner (net weight 25kg/50kg/1000kg)
• Do not transport with strong acids (sulfuric acid, hydrochloric acid) or food/feed
• Protect from direct sunlight, rain, and moisture; handle with care to prevent bag damage
Feel free to inquire anytime and lock in your favorite style!
