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Premium Kaolin Powder | High-Purity Mineral Solution

Kaolin powder is a pivotal non-metallic mineral material widely utilized across ceramics, paper, rubber, chemical, and various other industries. Its exceptional physical and chemical properties make it highly valuable, especially as the industry pivots to higher purity demands and sustainable, performance-driven solutions. This guide provides an in-depth exploration of kaolin powder, including pulverized kaolin, calcined kaolin, and introduces the advanced product, A large number of wholesale kaolin ceramic paper rubber chemical special.

Figure 1: High-purity kaolin powder micro-structure under SEM
Fine particle size and high whiteness for industrial grade applications

Overview: Market Trends & Industry Landscape

According to the Grand View Research report, the global kaolin market size was valued at USD 4.23 billion in 2023 and is expected to grow at a CAGR of 4.6% through 2030, fueled by advancements in ceramics, packaging, and polymer modification segments. Asia-Pacific dominates the production and consumption with China being the largest single-country contributor.

Growing use of pulverized kaolin in high-end ceramic glazes and refractories
Increased adoption of calcined kaolin for advanced paper coating and rubber reinforcement
Environmental-driven developments: replacement of TiO₂ pigments, sustainable filler alternatives
Emphasis on ISO/ANSI/FDA-compliant testing and quality traceability

Technical Parameters – Kaolin Powder, Pulverized Kaolin, and Calcined Kaolin

Kaolin Powder and Derivatives Technical Parameter Table
Type	Physical Form	Whiteness (%)	Particle Size (D50, µm)	pH	Moisture (%)	SiO₂ (%)	Al₂O₃ (%)	Common Standard
Kaolin Powder	Fine powder	85–94	1.0–7.0	5.0–7.0	≤2.0	45–48	34–37	ISO 1248-2006
Pulverized Kaolin	Coarse powder	73–85	5.0–25	5.0–6.5	≤4.5	42–47	32–35	ANSI/ASTM D4318
Calcined Kaolin	Bright white powder	92–96	0.8–2.5	6.0–7.5	≤0.6	50–54	43–46	FDA 21 CFR 176.170

Figure 2: Pulverized kaolin, optimized for ceramic and paper filling applications
Improved opacity and printability for high-grade papers

Manufacturing Process of Kaolin Powder (Step-by-Step)

Schematic Process Flow (for kaolin powder):

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1. Mining & Raw Selection

High-purity kaolinite ore extracted from certified deposits. Initial removal of Fe₂O₃ and TiO₂ impurities.

(ISO 14001-compliant sites)

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2. Ore Benefits & Pulping

Wet or dry beneficiation process. Pulping with dispersants for particle separation and grading.

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3. Refining & Purification

Staged hydrocyclone separation, magnetic removal, chemical bleaching to maximize whiteness and reduce metallic oxides.

(Conforms to ISO 9001, FDA 21 CFR
for food/paper grade)

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4. Calcination (For calcined)

Thermal treatment at 800–1200°C to enhance brightness and structure (if producing calcined kaolin).

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5. Milling & Classification

Fine grinding (CNC ball mill/jet mill) to required D50 particle size; multi-stage screening & air classification.

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6. Quality Control & Packaging

Continuous sampling, whiteness, pH, and SiO₂/Al₂O₃ analysis; batch-dated, double-lined packaging.

Certified ISO 1248-2006, ANSI, FDA compliance

Detailed video of production process:
Watch: Kaolin Powder Manufacturing Process

Product Spotlight: A Large Number of Wholesale Kaolin Ceramic Paper Rubber Chemical Special

Figure 3: Calcined kaolin – ultra-high whiteness, exceptional flow for advanced polymer composites
Popular in automotive plastics, masterbatches, and cable insulation

Product Name: Kaolin Ceramic Paper Rubber Chemical Special
Key Materials: Processed natural kaolinite, calcined for higher purity
Manufacturing: Advanced mine selection, CNC grinding, high-temperature calcination, coupled with automated quality monitoring (ISO 9001:2015)
Industry Standards: ISO 1248:2006, FDA 21CFR 176.170, RoHS/SGS certified
Endurance: Maintains particle stability under 220°C for 10,000+ hours in polymer composites (Ref)
Service Life (in ceramics): >20 years anti-corrosion in sanitary/chemical ware per ASTM C373

Data Sources: SHUNSHUN MINING Lab, sector averages from ScienceDirect.com

Product Specification – A Large Number of Wholesale Kaolin Ceramic Paper Rubber Chemical Special
Property	Specification	Standard
Appearance	Ultra-fine, white, odorless powder	ISO 1248
Whiteness (%)	94–96	ISO 2469
D50 Particle Size (µm)	0.8–1.5	Malvern Laser 3000E
Moisture (%)	≤0.6	GB/T 5211.3
pH	6.0–7.6	GB/T 14563
SiO₂ (%)	52.1–54	ICP-AES
Al₂O₃ (%)	44.2–46.3	ICP-AES
Oil absorption (g/100g)	30–40	GB/T 5211.15
Brightness (%)	≥92	TAPPI T 452

Applications & Case Studies

Figure 4: kaolin powder applied in advanced ceramic tiles and sanitary ware
Boosts flexural strength and translucency

Ceramic Industry: Sanitary porcelain, tiles, tableware, and refractories use high-purity kaolin powder to increase density, white index, and thermal resistance.
Paper Coating: Calcined kaolin optimizes brightness, smoothness, and opacity, critical for art/magazine paper (substitute for TiO₂; TAPPI data report up to 15% cost savings).
Rubber & Plastics: Improves tensile strength, abrasion resistance, and machinability in tires, wires, cable sheathing, and molded components.
Chemical Processing: Fillers in adhesives, catalysts, paints; surface-treated grades support FDA-compliant packaging.
Environmental/Anti-corrosion Solutions: Used in anti-corrosive coatings for pipelines/fittings (see ResearchGate - tested vs conventional fillers, >25% longer service life at 0.5mm thickness)

Case Study: High-Gloss Tiles for European Construction

Problem: A major tile manufacturer in Italy faced surface pinholes and lack of opacity in their high-gloss wall tiles.
Solution: Customized kaolin powder blend supplied by Shunshun Mining, targeting particle size D50=1.2µm and whiteness at 95%.
Result: Pinholes reduced by 85%, L* brightness gain +7.8, production yield up by 6% (ISO 13006 test), client testimonial verified.

Experience: Rubber Masterbatch Reinforcement

Client: SEA tire producer
Requirement: Enhanced tensile/tear resistance, stable at 180°C dynamic use

Adopted calcined kaolin–based loading at 12 phr in NR/BR masterbatch
Tensile modulus improved by 18%, tear strength +27% over conventional filler (Testing: ASTM D412)

Feedback: “Superior cost/performance ratio, solved extrusion flow issues at high speed.”

Manufacturer Comparison: Why Choose Shunshun Mining?

Industry Benchmark: Kaolin Product Manufacturers
Manufacturer	Production Capacity (TPA)	Main Grades	Certifications	Customization	Service Footprint	Years of Experience
Shunshun Mining	220,000	Kaolin powder, calcined, nano-kaolin	ISO 9001/14001, FDA, SGS	OEM/ODM, tailored size/whiteness	Global: EU, Asia, Americas	19
Imerys	300,000	Hydrous/Calcined Kaolin	ISO, FDA, REACH	Partial	Global	25+
BASF	250,000	Calcined Kaolin, Eng. Fillers	ISO, EN, FDA	Engineering	Global	20+
LB Minerals	150,000	Kaolin, Ball Clay	ISO, FCA	Limited	EU/Russia	18

OEM/ODM Service: Fast technical support, custom grades, free samples for qualified industrial users
Accreditations: SGS/BV 3rd-party auditing, ISO 9001:2015 and ISO 14001-certified production
References: Supplied to EU ceramic majors, Asia’s top five tire manufacturers, and FDA-compliant food packaging clients

Customization & Technical Services

Particle Size Customization: CNC-milled to D50 between 0.8μm–20μm per customer formula, minimal oversize guarantee
Surface Modification: Available hydrophobic/organosilane grades for improved dispersion in polymers
Whiteness Control: Batch-specific whiteness from 80% (industrial) to >96% (premium ceramic)
Packaging Options: 20kg/25kg PE bags, 500kg/1000kg jumbo, bulk container111ized shipping; anti-static and food safe liners available
Testing Support: Full COA, ICP-AES element analysis, SEM microstructure, RoHS/REACH reports for each batch

Quality Guarantee: 2-Year Product Performance Warranty | 24/7 Technical Support | Swift Logistics, Trackable Deliveries | Free Batch Testing Pre-shipment

Lead Time:
Samples: 2–5 working days;
Bulk Orders: 7–15 days from order confirmation (FOB/CFR/CIF terms)
Customization: +3–5 days for new grades

Note: End-use distribution based on industry data (2023, Statista)

Advanced Application Feedback & Experience

Polymer Compounder (Malaysia):

“Switching to Shunshun’s calcined kaolin powder slashed our TiO₂ use by 25%, improved physical stability, and met FDA migration limits (tested per FDA 21 CFR 176.170). After 14 months, zero complaints—reliable whiteness and absolutely clean batches.”

Sanitary Ceramics Plant (Turkey):

“We faced glaze pinholes and color instability. Through targeted D50 size and high aluminate content kaolin, we achieved uniform surfaces, passed EN 997 & EN 14411, and reduced water permeability by 19%.”

Paper Mill (Vietnam):

“With Shunshun’s engineered kaolin powder, the opacity of our art papers jumped by 22%, and our aging tests show far better print fastness than with previous fillers.”

Professional FAQ – Technical FAQ on Kaolin Powder

1. What are the typical material compositions of kaolin powder?

Kaolin powder is primarily composed of hydrated aluminum silicate (Al₂Si₂O₅(OH)₄), with >95% Al₂O₃+SiO₂ in high-grade products. Trace elements may include Fe₂O₃, K₂O, and TiO₂, which are strictly controlled for ceramics/paper use.

2. What particle size specifications are most important for application performance?

Particle size D50 (median value) affects surface finish, opacity, and strength. For high-gloss ceramics, D50 of 0.8–1.3μm ensures smooth texture; for rubber fillers, D50 up to 5–8μm boosts reinforcement but maintains process flow.

3. How is whiteness measured, and why is it essential?

Measured by reflectance at 457nm (ISO 2469), whiteness impacts color, brightness, and masking in end products. Kaolin powder exceeding 92% whiteness is preferred in premium applications.

4. Which standards are followed for manufacturing and quality testing?

Key standards include ISO 1248 for physical properties, ASTM D4318 for clay character, FDA 21 CFR 176.170 for food-contact safety, and REACH/RoHS for environmental/filler approvals. Certificates of Analysis (COA) and batch tracking reports accompany every shipment.

5. What is calcined kaolin, and how does it differ technically?

Calcined kaolin is obtained by thermal treatment above 850°C, which increases whiteness, eliminates structural moisture, and enhances electrical insulation. It is mainly used for high-end paper/polymers and electrical cable fillers.

6. How is kaolin powder installed and stored at plant sites?

Delivered in sealed bags/bulk container111s; store in cool, dry, shaded warehouses, away from acids/alkalis. Use vacuum feeding or dedicated hoppers; follow ISO 22000 hygiene protocols for food/paper use.

7. What is the expected shelf life and requalification protocol?

Standard shelf life is 2 years unopened. For critical applications, re-check whiteness, moisture, and pH before use after 18–24 months.

Authority, Certification & Customer Trust

Industry Experience: Shunshun Mining – 19+ years, ISO 9001/14001
Cooperation Network: Partner to over 500 ceramic, paper, and plastic companies globally; major users in the EU, SEA, and the Americas
Accredited Labs: SGS, Intertek, and local CIQ laboratories for yearly compliance audits
Global Standards: All products in compliance with ISO, ANSI, FDA, and local EH&S regulations (ISO Reference)
Continuous R&D: 3 patented process improvements since 2017 (see Google Patents)

Contact and Customer Support

24/7 Technical Consultation: Contact via website online chat or email; response within 2 working hours.
Sample Requests: Free for qualified B2B users, usually dispatched within 48h by DHL/FedEx

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