Industrial Grade Calcium Hydroxide for Wastewater Treatment and Construction Industry

Calcium Hydroxide, commonly known as slaked lime or hydrated lime, CAS No.1305-62-0, is an inorganic alkaline compound produced by controlled hydration reaction of high-quality calcined quicklime and purified water, followed by air separation, grinding and multi-stage impurity removal processing. The finished product appears as fine white amorphous powder, odorless, slightly soluble in water, forming lime water after dissolution with distinct alkaline property; its aqueous solution can absorb carbon dioxide in air and gradually turn turbid to generate calcium carbonate sediment. Our products adopt raw ore pre-screening and closed automated hydration production, effectively removing silica, magnesium oxide and oversize insoluble impurities, delivering stable effective calcium hydroxide content and low heavy metal residue. Relying on excellent neutralization, flocculation, dephosphorization and desulfurization capabilities, hydrated lime has become a cost-effective bulk alkaline raw material, widely deployed across environmental wastewater treatment, flue gas desulfurization, construction engineering, metallurgy mineral processing, chemical synthesis and food auxiliary fields, complying with corresponding industrial and food auxiliary raw material inspection standards.

Applications
**Environmental Protection: Wastewater & Sewage Treatment (Main Application Field)**: It acts as low-cost alkaline neutralizer for all types of acidic wastewater discharged from electroplating factories, chemical plants, printing & dyeing workshops and mine pickling production lines, neutralizing excessive acid value to adjust wastewater pH up to legal emission standard. When treating heavy metal-containing wastewater including copper, nickel, zinc, chromium wastewater, calcium hydroxide reacts with soluble heavy metal ions to form insoluble hydroxide precipitate for solid-liquid separation and harmless pollutant removal. Besides, it serves as economical phosphorus removal agent for municipal domestic sewage, combining phosphate radical to generate calcium phosphate sediment and effectively reduce total phosphorus index of outgoing water; meanwhile it assists coagulant to improve sludge sedimentation efficiency and cut overall water treatment chemical cost remarkably.
**Power Plant & Industrial Boiler Flue Gas Desulfurization**: Core raw material for dry and semi-dry flue gas desulfurization process in thermal power plants, steel kilns and industrial coal-fired boilers. The powdery calcium hydroxide mixes fully with sulfur dioxide, hydrogen chloride and other acidic harmful exhaust gas inside desulfurization tower to generate stable calcium sulfite and calcium chloride solid waste, realizing efficient removal of acid flue gas to satisfy national atmospheric emission limit requirements, widely replacing expensive high-purity limestone powder in medium and small-sized desulfurization projects for outstanding cost advantage.
**Construction & Building Material Industry**: Traditional essential raw material for construction mortar, mixed with sand and cement to prepare wall plastering mortar and masonry mortar; after mixing with water, it slowly absorbs carbon dioxide in air to harden and strengthen wall structure. It is also used as raw material for aerated concrete block, gypsum auxiliary modifier and road base stabilizing agent to enhance soil compaction performance of road foundation.
**Metallurgy & Mineral Processing Industry**: Applied as alkaline flux and impurity remover in non-ferrous metal smelting and ore flotation production, neutralize excess acidic flotation liquid and precipitate harmful impurity ions in ore pulp to improve concentrate grade; during steelmaking auxiliary processing, it removes sulfur and phosphorus impurities inside molten iron and improves finished steel quality.
**Chemical & Other Auxiliary Industries**: Basic raw material for producing calcium salt series products such as calcium carbonate, calcium fluoride and calcium stearate; used as pH regulator and precipitant in pesticide, rubber auxiliary and organic chemical intermediate synthesis. Food-grade modified calcium hydroxide can serve as food additive and acidity regulator for sugar refining processing.

Product Advantages
✅ Strict raw limestone sorting plus full-automatic hydration production control ensures stable effective content and low insoluble impurity, avoiding pipeline blockage and dosing equipment wear during automatic feeding in wastewater plants.
✅ Ultra-fine grinding process improves powder activity and reaction contact area, enhancing neutralization and desulfurization efficiency to reduce actual dosing consumption and customer’s comprehensive usage cost compared with inferior bulk slaked lime on market.
✅ Multiple fineness options available including 100 mesh, 200 mesh and 325 mesh to match different dosing equipment and production technological requirements of desulfurization, water treatment and chemical formulation respectively.
✅ Complete batch-by-batch laboratory testing before delivery, formal COA analysis report and MSDS safety data document supplied for global import customs clearance and factory incoming inspection.
✅ Large-scale fixed production line with continuous stock supply, flexible order scheme supporting small pallet trial purchase and bulk jumbo bag full-container long-term framework cooperation.

Packaging & Storage
Standard specification: 25kg inner PE lined woven plastic bag for moisture prevention; 500kg/1000kg bulk ton bag is available for large-quantity bulk procurement. Store finished goods inside cool, dry and well-ventilated warehouse, keep packages tightly sealed all the time, completely isolate from humid ground, acidic chemicals, ammonium salts and edible raw materials. Prevent outdoor rain soaking and long-term air exposure which leads to absorption of CO₂ and moisture resulting in deterioration and effective content decline. Avoid over-high stacking to prevent package rupture and powder leakage. Valid shelf life is 12 months under sealed dry storage condition.

Safety Information
Calcium hydroxide powder has mild alkaline irritation to human skin, mucous membrane and respiratory tract. Long-time inhalation of flying dust easily causes throat and nasal discomfort; operators must equip dust-proof respirator and alkaline-resistant rubber gloves during unpacking, feeding and transportation operations. Once powder splashes into eyes or moist skin, flush contaminated part continuously with abundant flowing clean water for timely treatment. This product belongs to ordinary industrial chemical, non-dangerous goods for land, sea and air conventional transportation; complete MSDS including leakage cleaning disposal and emergency first-aid guidance is provided along with every shipment cargo.

With 15 years of chemical foreign trade experience, our core advantages:

1, 70,000㎡ warehouse (20,000-ton capacity), moisture-proof & temperature-controlled, easy for large orders;
2, Free Samples (Shipped within 3-7 days), Zero Trial Cost;
3, Production cycle of dangerous goods: 45-60 days, transparent lead time;
4, Hold dangerous chemicals operation license & ISO certifications, smooth customs clearance;
5, 6 packaging options, logo customization available, reduce losses;
6, 400+ chemical SKUs, one-stop procurement saves costs.

Please inform procurement volume, target market, etc., we'll customize a plan for you!