High-Purity Silica, Feldspar & Kaolin for Turkish Glass and Ceramic Tile Plants
For glass and ceramic tile plants in Turkey, Raiva International Trading Group (RAIVACO) is a direct B2B exporter of high-purity silica, feldspar, and kaolin. We supply these critical raw materials directly from certified quarries and mines in Iran and Oman, eliminating intermediaries to ensure consistent quality and reliable logistics. This guide covers the specific chemical requirements for these materials, the logistics of importing into Turkey, and how to verify batch quality before shipment.
Kaolin Suppliers for Ceramic Bodies
Kaolin is the primary plasticizer and body former in ceramic tile production. For fast-fired porcelain tile lines, the whiteness of the fired body is the most critical attribute. This whiteness is determined by the iron and titania content of the raw clay. Raivaco supplies bulk kaolin certified at 20.28% alumina with iron held to 0.15%, which is the figure that keeps the fired body white. We supply this material as lump or milled powder, ensuring it meets the specific particle size requirements of your grinding mill.
Chemical Composition and Purity
The chemical analysis of our kaolin is published in full on our product pages. The typical values include 67.66% silica, 20.28% alumina, and 0.15% iron oxide. Loss on ignition is determined at 9.48%. These values are typical production ranges; a batch-specific Certificate of Analysis is issued with every shipment to confirm the exact chemistry of the cargo.
Applications in Tile Manufacturing
In ceramic tile manufacturing, kaolin provides the necessary plasticity for forming and the refractory strength for firing. It is also used in paper coating and paint as an extender pigment. For tile plants, the plate-shaped particle structure of kaolinite is essential for achieving the desired density and strength in the final product.
High-Purity Silica for Glass Batch
Silica is the main constituent of glass, and its purity directly impacts the clarity and color of the final product. Raivaco exports bulk silica across three grades, including high-purity quartz certified to 99.71% silica with iron at 0.06%. This level of purity is essential for container glass and high-end architectural glass where color neutrality is required. We also supply glass-batch grades and foundry grades depending on your specific application.
Grade Selection for Glass
When selecting silica for glass batch, the iron content is the primary differentiator. Lower iron levels result in clearer glass. Our high-purity quartz grade is ideal for applications requiring maximum transparency. The material is supplied in bulk or jumbo bags, with a batch-specific Certificate of Analysis per shipment to verify the silica percentage and impurity levels.
Feldspar Grades for Fluxing
Feldspar is an alkali flux that lowers the melting temperature of the glass batch. Raivaco supplies feldspar in three chemistries: a potassic grade, a sodic grade, and a blended grade. The choice between these grades depends on the firing window and the melt behavior required by your production line.
Potassic vs. Sodic Feldspar
Potassium feldspar (K-spar) melts stiff over a wide temperature range and is suitable for glaze and slow-fired porcelain. Sodium feldspar (Na-spar) melts lower and runs thinner, which is what a fast-fired tile line wants. Our potassic grade contains 11.80% K2O with iron held to 0.14%, while our sodic grade contains 9.40% Na2O. The blended grade offers a balance of both alkalis for general body and glass batch applications.
Logistics and Incoterms for Turkey
Logistics is a critical factor when importing raw materials into Turkey. Raivaco operates two regional trade desks, one in Muscat, Oman, and one in Yazd, Iran. This dual-office setup allows us to coordinate shipments across time zones and provide flexible logistics options. We ship under EXW, FOB, CFR, and CIF terms (Incoterms 2020) by sea, with standard loading at Bandar Abbas and Bandar Imam Khomeini. For overland shipments, we offer DAP and FCA terms by truck and rail through Iran's land borders.
Shipping Options and Lead Times
Standard lead times for our mineral products are 7 to 14 days. Minimum order quantities vary by product; for bagged minerals, the MOQ is typically 1 x 20 ft container (approx. 25 MT), while bulk vessel shipments require a minimum of 500 MT. Trial quantities are available for qualification purposes. Our logistics team works to ensure on-schedule delivery, coordinating with carriers to meet your production timelines.
Quality Verification and Certificates
Quality verification is non-negotiable in industrial mineral trading. Every batch of silica, feldspar, and kaolin shipped by Raivaco includes a batch-specific Certificate of Analysis (CoA). This document reports the actual chemical and physical properties of the shipment, not just the specification band. For drilling and industrial applications, we also provide third-party inspection options through SGS, Bureau Veritas, or the buyer's nominee.
Understanding the Certificate of Analysis
The CoA is the binding document that confirms the cargo meets the agreed specifications. It includes data on oxide content, particle size distribution, and physical properties such as bulk density and moisture. We encourage buyers to review the CoA against their internal quality standards before accepting the shipment. Our technical team is available to discuss any questions regarding the analysis results.
Key Takeaways
- Raivaco is a direct B2B exporter of high-purity silica, feldspar, and kaolin from Iran and Oman.
- Our kaolin is certified at 20.28% alumina with 0.15% iron, ensuring white fired bodies.
- High-purity silica is available at 99.71% SiO2 with 0.06% iron for clear glass production.
- Feldspar is supplied in potassic, sodic, and blended grades to match specific firing requirements.
- Logistics options include FOB, CFR, CIF, DAP, and FCA terms with 7-14 day lead times.
- Every shipment includes a batch-specific Certificate of Analysis for quality verification.
- Minimum order quantities start at 25 MT for bagged cargo and 500 MT for bulk vessels.
Frequently Asked Questions
What is the minimum order quantity for silica and feldspar?
The minimum order quantity for bagged silica and feldspar is 1 x 20 ft container, which is approximately 25 MT. For bulk vessel shipments, the minimum is 500 MT. Trial quantities are available for qualification purposes.
Do you provide third-party inspection for shipments?
Yes, third-party inspection is available at the buyer's request. We can arrange inspection by SGS, Bureau Veritas, or the buyer's nominated agency to verify the quality and quantity of the shipment before or during loading.
What are the standard lead times for these minerals?
Standard lead times for our mineral products are 7 to 14 days. This timeframe covers processing, quality testing, and preparation for shipment. Actual lead times may vary depending on the specific grade and quantity ordered.
Can you supply custom grades of kaolin or feldspar?
Yes, we offer bespoke production services. If none of our standard grades matches your target chemistry, fineness, or packaging, you can send us your requirements, and we will produce custom grades to your exact specification.
What Incoterms do you offer for shipments to Turkey?
We offer EXW, FOB, CFR, and CIF terms by sea, with standard loading at Bandar Abbas and Bandar Imam Khomeini. For overland shipments, we offer DAP and FCA terms by truck and rail through Iran's land borders.
How is the whiteness of kaolin determined?
The whiteness of kaolin is primarily determined by its iron and titania content. Lower levels of these impurities result in a whiter fired body. Our kaolin is certified with iron at 0.15% and titania at 0.20%, which is suitable for high-quality ceramic applications.
Conclusion
For glass and ceramic tile plants in Turkey, sourcing high-purity raw materials from a reliable, direct exporter is essential for maintaining product quality and production efficiency. Raiva International Trading Group provides direct access to certified quarries and mines, ensuring consistent quality and competitive pricing. Our dual-office setup in Oman and Iran allows for flexible logistics and responsive customer service. To plan your next shipment or request a quote for silica, feldspar, or kaolin, .