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Low Magnesium Calcium Oxide Powder with Good Price for Rubber Industry

Premium Low Price Calcium Oxide Quick Lime Used for Metallurgy Industry

Premium Quality High Whiteness Quicklime Powder with Low Impurity Fast Reactivity CAS 1305-78-8

The chemical name of quicklime is Calcium Oxide, and its chemical formula is CaO.It is an important inorganic chemical raw material. It is usually a white or grayish white solid in the form of lumps, granules, or powder, with strong hygroscopicity and corrosiveness. It reacts violently with water and releases a large amount of heat, producing calcium hydroxide.

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Product Description

Key Properties

Physical Properties	Chemical Properties

- Density: 3.3 g/cm³ - Melting Point: 2572°C - Boiling Point: 2850°C - Highly hygroscopic, prone to deliquescence	- Strong alkalinity; exothermic reaction with water - Reacts with acids to form calcium salts and water (e.g., with HCl: $CaO + 2 HCl \to CaCl_{2} + H_{2} O$ ) - Reacts with carbon dioxide to form calcium carbonate: $CaO + CO_{2} \to CaCO_{3}$

Overview

High whiteness quicklime refers to calcium oxide (CaO) products processed through special techniques, characterized by high purity, low impurities, and a high whiteness value.

1. Whiteness Value: Typically ≥85 (while ordinary quicklime has a whiteness of 60–75), with some high-end products reaching over 90.

2. Purity: CaO content ≥90% (industrial grade), total impurity content (e.g., Fe₂O₃, MgO, SiO₂) ≤3%, especially extremely low iron content (Fe₂O₃ ≤0.1%), which is crucial for pure color.

3. Physical Form: Mostly fine powder (particle size ≤100 mesh) or uniform granules (1–3mm), with good dispersibility and high reaction activity.

Features

Technical Parameters	Customer Value	vs. Ordinary Quicklime
Whiteness ≥85	Enhances pure color in end products, suitable for white formulations	Ordinary whiteness 60–75, prone to yellowing
Fe₂O₃ ≤0.1%	Prevents oxidation discoloration/performance degradation from iron ions	Ordinary Fe content ≥0.5%, easy to yellow
Particle size ≤100 mesh (D90)	High dispersibility, reduces processing energy consumption	Uneven particle size in ordinary products, requiring secondary grinding

Application

Plastics and Rubber Industry：

Used in white/light-colored plastic products (e.g., pipes, films, injection-molded parts) to replace partial titanium dioxide, reducing costs while improving product whiteness and gloss.

Coatings and Inks：

White Pigment Base Material: Produces water-based coatings, powder coatings, or inks, with good compatibility with resins to reduce titanium dioxide usage by 20–30%.
Advantage: Stable pH (10–12), less reactive with acidic components in coatings to avoid yellowing or caking.

Paper and Printing

Coating Filler: Used in high-grade paper (e.g., art paper, bible paper) surface coating to improve paper whiteness (≥90) and opacity, enhancing printability.
Replaces Calcium Carbonate: Compared to light calcium carbonate, it has lower oil absorption (≤25ml/100g), reducing adhesive usage and production costs.