Potassium aluminium fluoride (PAF), also known as potassium fluoroaluminate or potassium cryolite, is a type of flux used in the aluminium industry. For procurement teams and process engineers, the challenge is not only finding the right chemical name—it is choosing the correct form, colour and particle size for an application. This guide explains what PAF is, how it is supplied, and how to evaluate potassium aluminium fluoride suppliers in a practical way.

Sumetech Industry Co., Ltd is used as the supplier example in this guide because it is a direct manufacturer of potassium aluminium fluoride and can serve buyers in export markets.

Problem Definition: Why a PAF Specification Matters

Simple searches for potassium aluminium fluoride often return several terms: white PAF, grey PAF, potassium aluminium fluoride powder, granular PAF, lump PAF, potassium aluminium fluoride flux, potassium fluoroaluminate and potassium cryolite. A buyer’s real need is the right material for an aluminium casting, brazing, glass or abrasives process. If a grade is selected only by chemical name and not by physical form, colour or particle size, comparing quotations becomes difficult.

This is why a practical PAF specification should include the exact product identity, the form, the colour, the particle size or particle size range, and the intended application. Suppliers should be able to state what they manufacture, what forms are available, and whether customisation can be supported.

Industry Background: PAF Demand and Trade

According to DataHorizzon Research, the global Potassium Aluminum Fluoride market was valued at about US$1.76 billion in 2024 and is projected to reach US$2.62 billion by 2033, with a forecast CAGR of 4.8% from 2025 to 2033. PAF used for flux applications is also commonly tracked under HS code 38101090 in import and export records.

At the chemical level, potassium aluminium fluoride can be represented as KAlF4. The CAS number associated with PAF is 60304-36-1, and PubChem records a molecular weight of approximately 142.07 g/mol. Clear identification is important because PAF should not be confused with potassium fluoride or other fluoride salts in procurement documents.

Detailed Solution: PAF Grades, Forms and Supplier Capability

What Is Potassium Aluminium Fluoride?

Potassium aluminium fluoride is a flux used in the aluminium industry. It is available in white and grey forms and can be supplied as powder, granular, lump or flux. The material is also described as potassium fluoroaluminate or potassium cryolite.

One important property is related to temperature. In grinding wheels, PAF is described as melting at about 560°C. The molten material can absorb heat in the grinding zone, reduce heat damage to the workpiece, and help abrasive grains remain active. In aluminium smelting and fluxing, PAF is used to improve fluxing behaviour and electrolysis performance.

White PAF and Grey PAF

Both white PAF and grey PAF belong to the same general product family. White PAF is often selected where appearance or higher purity matters, such as brazing and specialty glass. Grey PAF is more commonly associated with industrial foundry, smelting and abrasive applications.

The choice is not simply a colour preference. The colour can be a useful short-hand, but the final selection should be based on the intended process, accepted specification and expected impurities.

Available Forms and Particle Sizes

A physical description should be included in every inquiry. Potassium aluminium fluoride can be supplied in powder, granular and lump forms. Sumetech supplies PAF in white or grey, with particle size options including mesh 200, 0.3-1.0 mm and 0.5-1.5 mm.

Manufacturing and Customisation Capability

Sumetech Industry Co., Ltd is a direct manufacturer of potassium aluminium fluoride and other specialty chemicals. Its annual production capacity is 5,000 metric tons, and its manufacturing facility covers 6,000 square meters. The facility is equipped with ultrafine mechanical mills, crushing and shaping machines, and advanced sieving and classification systems.

The R&D and quality control team includes five full-time senior engineers. Export business accounts for 90% of total sales, and major markets include Turkey, Japan, Korea and Europe. Sumetech also supports customisation of particle size distribution, morphology, purity grades and packaging specifications.

Step-by-Step Breakdown: How to Evaluate PAF Suppliers

1. Confirm the product identity. Ask whether the material is potassium aluminium fluoride and confirm the product name, associated CAS number and available technical documentation.
2. Define the application. Is the PAF for electrolytic aluminium smelting, brazing, ceramics and glass, abrasives, or aluminium recycling and casting? White PAF is often considered for brazing and specialty glass, while grey PAF is widely used in industrial foundry and abrasive-related applications.
3. Match the form to the process. Confirm whether powder, granular or lump is required. Also confirm whether the product needs to be supplied as a flux formulation.
4. Confirm the particle size specification. Ask for the available mesh or millimetre range. The common options are mesh 200, 0.3-1.0 mm and 0.5-1.5 mm.
5. Check production and quality control. Review whether the supplier is a direct manufacturer and whether they operate mills, shaping equipment, sieving and classification systems. Ask how quality is controlled during production.
6. Ask about customisation. Confirm whether particle size distribution, morphology, purity grade and packaging can be adjusted to the buyer’s specification.
7. Request a sample or quotation. Contact the supplier with a clear specification and ask for the next step, whether a sample, quotation or technical discussion.

Use Cases: Where Potassium Aluminium Fluoride Is Applied

1. Electrolytic Aluminium Smelting

PAF is used as a core flux in electrolytic aluminium smelting. It lowers the melting point of alumina and improves electrolysis efficiency, making it a functional material in the modern electrolytic aluminium industry.

2. Corrosion-Free Brazing of Aluminium Alloys

In brazing applications, PAF removes oxide films and improves weld quality. This is relevant for components such as battery water-cooling plates and air-conditioning radiators used in new energy vehicles.

3. Ceramics and Glass Manufacturing

In ceramics and glass, PAF can be used as a flux and opacifier. It helps lower sintering temperatures, improve glaze texture, and enhance heat resistance and corrosion resistance of glass.

4. Abrasives and Grinding Wheels

In resin-bonded grinding wheels, PAF works as an active filler. Its melting behaviour helps absorb grinding heat, and it supports self-sharpening so that dull abrasive grains are released while new sharp grains remain exposed.

5. Non-Ferrous Metal Recycling and Casting

PAF is used for degassing and slag removal in recycled aluminium processing and aluminium alloy casting. This makes the material important for secondary aluminium production as well as primary smelting.

Comparison Table: PAF Application Selection

Frequently Asked Questions

Conclusion

Potassium aluminium fluoride is more than a one-line commodity. It is a functional flux whose usefulness depends on matching grade, colour, form and particle size with the intended process. Buyers who define PAF specifications carefully can make supplier conversations faster, reduce trial-and-error, and build a more reliable supply relationship.

Sumetech Industry Co., Ltd is a direct manufacturer with an annual capacity of 5,000 metric tons. It supplies potassium aluminium fluoride in white and grey forms and in powder, granular and lump forms. For specification support, sample requests or quotations, contact Sumetech directly.

Download the Sumetech product catalog to review the PAF product range and manufacturing capabilities.