Potassium-sodium feldspar separation solutions

Potassium sodium feldspar beneficiation solutions: purification and whitening, empowering the high-end ceramic glass industry

I. Overview: from mineral to high-quality raw materials of the precise metamorphosis

Potassium and sodium feldspar is an indispensable core raw material for ceramics and glass industries, and its quality ( K₂O+Na₂O content, Fe₂O₃ content, whiteness ) directly determines the grade and value of the end products. We provide a mature overall solution of potassium and sodium feldspar beneficiation, through the combined process of " crushing - grinding - magnetic separation - flotation ", professionally and efficiently remove iron, titanium, mica, quartz and other impurities, and convert low-grade feldspar ore into K₂O + Na₂O ≥ 12%, Fe₂O₃ ≤ 0.2%, whiteness of ≥ 75 degrees of high value-added products. High value-added products, processing scale can be flexibly customized 50-2000 tons / day, to fully meet the demanding needs of ceramics, glass and other industries for high-quality raw materials.

Second, the core process: four-step precision purification

1. Crushing and screening system - laying the foundation for efficient sorting

• Process: Adopt " two stages and one closed-circuit " crushing process.

  • Coarse crushing: Jaw crusher, handling large raw ore, strong impact resistance.

  • Fine crushing: Cone crusher, which produces medium and fine products with uniform particle size.

  • Screening: Circular vibrating screen and fine crushing mechanism into a closed loop, strict control of the size of the grinding (usually ≤ 15mm), improve grinding efficiency.

2. Grinding and Classifying System - Realizing Mineral Monomer Dissociation

• Process: Ball mill and spiral classifier (or hydrocyclone) are used to form a closed-circuit system.

• Purpose: grind the ore to -200 mesh with a fineness of 75%-80%, so that the feldspar and impurity minerals (especially iron minerals and mica) can be fully dissociated, and create the best conditions for subsequent sorting.

3. Magnetic Separation and Iron Removal System - Deep removal of iron and titanium impurities (core impurity removal link)

• Process:

  • Weak Magnetic Separation: Firstly, permanent magnetic cylinder magnetic separator is used to remove strong magnetic minerals (e.g. magnetite, magnetic pyrite).

  • Strong Magnetic Separation: followed by high gradient strong magnetic separator (background field strength 1.0 - 1.5 Tesla ) to efficiently remove weak magnetic impurities such as limonite, hematite, smectite, ilmenite and so on.

• Effect: This link can remove most of the iron and titanium impurities and reduce the Fe₂O₃ content by more than 80%, which is the key to improve the whiteness and grade of the product.

4. Flotation purification system - accurate separation of mica and quartz

• Scenario: When the raw ore contains more mica or quartz, and the requirement of potassium and sodium content of the product is very high.

• Process: Reverse flotation process is usually adopted.

  • Mica Removal: Under acidic or neutral conditions, mica is preferentially flown out using amine cationic traps.

  • Quartz removal: under alkaline condition, use anionic and cationic combination of trappers to separate quartz by flotation.

• Purpose: To further improve the total K₂O+Na₂O content to ensure the product meets the standard of high-end applications.

5. Dewatering and drying system - to produce qualified finished products

• Concentration: Preliminary dewatering using high efficiency thickener.

• Filtration: Plate and frame filter press or ceramic filter to obtain low moisture content filter cake (≤15%).

• Drying (optional): For products with strict moisture requirements, rotary dryer is equipped for drying.

Third, the technical indicators: from the original ore to the concentrate of the magnificent turnaround

Fourth, the core equipment configuration recommendation

V. Successful Cases

An annual output of 150,000 tons of potassium and sodium feldspar concentrate project

• Nature of raw ore: potassium feldspar (55%), sodium feldspar (25%), quartz (15%), mica (3%), magnetite (2%).

• Process: two-stage crushing - one-stage grinding - weak magnetic - strong magnetic separation - flotation (except mica).

• Operation effect:

  • Concentrate yield：73.31%

  • K₂O+Na₂O content：12.8%

  • Fe₂O₃ content: 0.18

  • The product fully meets the standard of high-end ceramic blank material, and the customer has significant economic benefits.

VI. Solution Core Advantages

• Excellent quality: the joint process ensures high potassium and sodium, low iron and titanium, high whiteness, and strong core competitiveness.

• Mature and reliable technology: the process has been verified in many projects, with stable equipment operation and predictable indexes.

• Flexible customization: the processing scale from 50t/d to 2000t/d can be flexibly designed and modularly expanded to meet different investment requirements.

• Environmental protection and high efficiency: equipped with perfect dust collection, waste water recycling (reuse rate>90%), noise control system, in line with environmental protection requirements.

VII. Our Service Commitment

We provide one-stop service from "ore samples" to "products":

1. Free ore sample testing and experimentation: provide detailed process mineralogical analysis and selectivity test to determine the best process.

2. Personalized engineering design: process design, equipment selection and non-standard design according to test results and site conditions.

3. High-quality equipment supply: provide a full set of efficient and reliable host and auxiliary equipment.

4. Professional construction support: Engineer team on-site guidance for installation and commissioning until reaching the standard and production.

5. Technical training and after-sales service: train qualified operation and maintenance team for customers and provide long-term technical support.

Get your exclusive program immediately!
Please provide potassium sodium feldspar ore samples, our technical center will be for you:

1. Conduct composition analysis and selectivity test.

2. Provide a technically feasible and economically reasonable preliminary program and budget.