Factory Direct Sales 95% Content High Purity Low Price Calcium Oxide Powder

Overview

Factory Direct Sales 95% Content High Purity Low Price Calcium Oxide Powder (CAS: 1305-78-8), chemically known as CaO, is a premium industrial-grade alkaline compound derived from high-quality limestone through calcination at 1000–1200°C. With a molecular weight of 56.08 g/mol and purity ≥95%, this white crystalline powder exhibits exceptional reactivity and thermal stability, making it a cornerstone material in metallurgy, chemical synthesis, and environmental engineering. As a direct factory offering, it eliminates middleman markups, providing unmatched cost-effectiveness without compromising on quality. The powder is free-flowing with a median particle size of 50–100μm, ensuring easy handling and uniform dispersion in various applications.

Features

Exceptional Purity and Low Impurities:

95% Minimum Purity: Rigorously tested to ensure MgO <1.5%, Fe₂O₃ <0.1%, and SiO₂ <1.0%, meeting or exceeding ASTM C133-18 standards for industrial lime.

Low Heavy Metals: Pb <10ppm, As <5ppm, suitable for applications requiring strict impurity control, such as food-grade packaging (indirect contact) and pharmaceutical intermediates (non-active ingredients).

High Reactivity and Moisture Absorption:

Quick Slaking: Reacts rapidly with water to generate calcium hydroxide (slaked lime), releasing heat (exothermic reaction) and achieving ≥90% hydration efficiency within 10 minutes at 25°C.

Hygroscopic Nature: Absorbs moisture from the air (up to 30% of its weight in humid environments), making it an effective desiccant in storage containers and transport vessels.

Thermal and Chemical Stability:

High Melting Point: Maintains structural integrity up to 2572°C, ideal for high-temperature processes like steelmaking and glass manufacturing.

Acid Neutralization: Neutralizes 0.8–1.2 moles of H+ per gram, effectively treating acidic wastewater (pH adjustment from 2–4 to 6–9) and soil remediation (increasing pH for improved crop growth).

Factory Direct Pricing:

Cost Efficiency: Bulk orders (≥10 MT) receive discounts up to 20%, with customizable packaging (25kg/bag, 1MT/super sack) to reduce logistics costs for industrial buyers.

Application

Metallurgical Industry:

Steelmaking: Used as a flux to remove phosphorus and sulfur from molten iron, improving steel purity and mechanical properties (tensile strength +15% when used in continuous casting).

Non-Ferrous Metals: Facilitates oxide removal in aluminum smelting, reducing dross formation and improving casting surface quality.

Chemical Manufacturing:

Pulp and Paper: Neutralizes black liquor in kraft processes, enhancing cellulose extraction efficiency by 8–10%.

Calcium Salts Production: Serves as a raw material for calcium carbonate, calcium hydroxide, and calcium silicate, with reaction yields ≥98% in controlled synthesis.

Environmental Engineering:

Wastewater Treatment: Adjusts pH in mining runoff (removing heavy metals like Cu²+, Zn²+ through precipitation) and neutralizes acidic leachate in landfills.

Air Pollution Control: Absorbs SO₂ in flue gas desulfurization (FGD) systems, achieving 90% sulfur capture efficiency in coal-fired power plants.

Construction and Agriculture:

Soil Stabilization: Improves bearing capacity of clay soils (compressive strength +20%) for roadbeds and building foundations.

Fertilizer Adjuvant: Corrects soil acidity (pH 4.5–5.5 to 6.5–7.0), enhancing nutrient availability for crops like corn, soybeans, and wheat.