What Are The Improved Formulas For Magnesite-based Fickert Abrasive Blocks?

What are the improved formulas for magnesite-based fickert abrasive blocks?

Our company has greatly improved the product performance by improving the formula and manufacturing process of magnesite-based Fickert abrasive blocks.

The specific improvement methods are as follows:

(Stone polishing assembly line)

A comprehensive analysis of improved formulas for magnesite abrasive blocks
  I. Traditional Standard Magnesite Fickert Abrasive Blocks  

Disadvantages:

• prone to softening,
• short lifespan,
• poor water resistance

Basic Mix Ratio (by weight)

1. Light-burned Magnesium Oxide (MgO): 55–60 parts
2. Magnesium Chloride Brine (28° Bé): 28–33 parts
3. Green Silicon Carbide (SiC) (#120–#1500): 8–12 parts
4. Calcium Carbonate / Talc Powder (Filler): 4–7 parts
5. Table Salt (Pore-forming agent): 1–2 parts

Key Defects

• Loose matrix structure; prone to hydrolysis and grit shedding upon water exposure; poor wear resistance; fails after 1–3 hours of continuous use; consumption rate doubles when processing hard granite.

  2. Our Factory Wear-Resistant Improved Formula  

Flagship product; lifespan increased by 15%–30%

Overall Improvement Strategy

1. Incorporate inorganic water-resistant modifiers to seal micropores and prevent softening due to water exposure;
2. Use composite silica fume/bauxite to enhance matrix density and wear resistance;
3. Combine trace amounts of diamond micropowder with silicon carbide to improve cutting efficiency and wear resistance;
4. Add composite organic toughening agents to reduce brittleness and minimize chipping or block breakage.

Standard Optimized Weight Ratio (Stable Mass-Production Formula)
1) Reactive light-burned magnesium oxide: 56 parts

2) Modified magnesium chloride solution (with 0.15% trisodium phosphate added): 30 parts

3) Composite abrasive system (core modification): 9 parts

• Green silicon carbide (primary abrasive): 8.2 parts
• Ultrafine diamond powder (D50): 0.8 parts (enhances wear resistance and accelerates surface finishing)

4) Composite wear-resistant filler: 4.5 parts

• Microsilica powder: 2.5 parts (densifies matrix, improves wear resistance)
• Alpha-alumina polishing powder: 2 parts (improves surface smoothness)

5) Water-resistance and toughening modifier: 1.2 parts

• Polyurethane nano-emulsion: 0.7 parts (toughening and waterproofing)
• Stearic acid: 0.5 parts (anti-sticking, balances self-sharpening)

6) Slow-release pore-forming agent (urea granules): 0.8 parts (uniform pore formation, prevents surface clogging)

Our improved magnesite-based Fickert abrasive grinding block has high cost-effectiveness and stable performance

  3 Five Key Modification Mechanisms   
Trisodium Phosphate (Water-Resistance Modification)

• Neutralizes free chloride ions from magnesite hydration and seals internal capillaries; prevents matrix softening or grit shedding during prolonged water-cooled processing; extends continuous production line lifespan by approximately 20%.

Microsilica + Alumina Composite Filler

• Fills gaps between magnesium oxide crystals; significantly increases matrix hardness and impact resistance; prevents rapid wear under high-speed, heavy-pressure grinding heads.

Diamond Powder & Silicon Carbide Composite

• Pure silicon carbide wears down quickly; diamond powder provides sustained cutting force, increasing processing area by 15%–30% for the same grit size and resulting in more uniform polishing patterns.

Polyurethane Nano-Toughening Agent

• Traditional magnesite materials are brittle and prone to edge chipping; organic polymers form a flexible network, preventing block breakage when processing granite of uneven thickness and reducing rework rates.

Slow-release urea pore-forming agent

• Dissolves slowly upon contact with water to create microscopic, breathable pores; improves heat dissipation and prevents surface scorching or blackening when processing light-colored granite.

  4 High-end, water-resistant, and reinforced formula  

designed for 24-hour continuous granite production and humid, water-cooled operating conditions

Key formula upgrades:

1. Partial replacement of magnesium chloride with magnesium sulfate (magnesium oxysulfate modification) doubles hydrolysis resistance;
2. Addition of hollow glass microspheres disperses stress and reduces high-temperature wear;
3. Incorporation of a small amount of copper powder filler enhances thermal conductivity and prevents surface scorching.
4. Target customers: Granite factories in India and Brazil with round-the-clock production schedules; production lines with insufficient water cooling capacity.

  5 Performance comparison data for the improved formula