Quick Lime Lumps
Calcium oxide · CaO · calcined lime
High-calcium oxide lumps (CaO 85%-90%) produced by calcining Rajasthan's finest limestone. Fast-reacting, consistent purity. Used in steel manufacturing, paper & pulp, sugar, and chemical industries, supplied across India and overseas from Jodhpur.
What are Quick Lime Lumps?
Quick Lime (Calcium Oxide, CaO) is produced by calcining high-purity limestone at temperatures above 900°C in kilns. The result is hard, irregular calcium oxide lumps with high reactivity, known as Calcined Lime or Burnt Lime.
Shreenath Metchem has produced Quick Lime from Rajasthan's high-calcium limestone since 1988. Our calcined lime consistently achieves 85%-90% CaO content with low MgO (≤1.5%) and low SiO₂ (≤1.5%), making it suitable for demanding applications in steel, paper, sugar, and chemical synthesis. Available in both lump and powder form.
Packing & Dispatch
How lumps and ground powder are bagged and dispatched from the Jodhpur works.
Sizes, Forms & Packing
| Lump sizes | 20-40 mm · 10-60 mm · 5-25 mm |
|---|---|
| Forms available | Lump form and ground powder |
| Bag sizes | 25 kg · 40 kg bags · 1000 kg jumbo bags (FIBC) |
| Dispatch | Road and rail, from Jodhpur across India, with supply to buyers overseas |
| Chemical name | Calcium Oxide · CaO · Calcined Lime · Burnt Lime |
Industries We Serve
Where our Quick Lime Lumps are used, and what they do in each process.
Supplied as flux to BOF and EAF furnaces, where it removes sulphur, phosphorus, and silica from molten metal and controls slag basicity. CaO 85-90% with low MgO gives predictable slag chemistry, and consistent lump size steadies charge rates and cuts handling cost per heat.
Applied to weak or clay-heavy subgrade soils before road and runway construction. Quick lime reacts exothermically with soil moisture to dry it, then with clay minerals through cation exchange and pozzolanic action, permanently raising load-bearing capacity and removing the need for deep excavation.
A key raw material for bleaching powder, calcium carbide, PVC stabilisers, and other industrial chemicals. Synthesis needs 85-90% CaO with low silica and magnesia, because even minor contamination affects reaction yield and product quality in batch and continuous operations alike.
Used as primary feedstock, fused with coke in electric arc furnaces to make calcium carbide for acetylene and PVC. Consistent lump size governs how the charge packs, which sets heat distribution and the carbide yield per unit of electrical energy consumed.
Slaked on-site into fresh lime slurry for pH correction, softening, and heavy metal removal at large treatment plants. On-site slaking gives a more reactive Ca(OH)₂, and quick lime costs less to move and store per unit of available Ca(OH)₂.
Slaked on-site into milk of lime and dosed into raw cane juice during defecation. It raises juice pH to 10-11, so proteins and colloidal impurities coagulate and settle, and lime purity governs the colour and whiteness of the finished sugar.
Used in the kraft recovery cycle, where it is slaked to Ca(OH)₂ to causticise spent green liquor back into white liquor. The lime mud by-product is recalcined in a recovery kiln, and consistent CaO content cuts make-up lime per tonne of pulp.
Used to control pH in ore flotation circuits and to manage cyanide-bearing wastewater at gold, silver, and base metal operations. Precise pH governs mineral selectivity, and quick lime holds the alkalinity that prevents HCN evolution at the lowest reagent cost at this volume.
Slaked on-site into reactive hydrated lime and injected into flue gas scrubbers to remove SO₂ and other acid gases from stack emissions. Freshly slaked Ca(OH)₂ captures more acid gas per kilogram, and quick lime carries more available Ca(OH)₂ per tonne, cutting transport cost.
Used for lime mortar, plaster, and whitewash, and slaked on-site for soil stabilisation under foundations. Freshly slaked lime makes a more reactive putty than bagged hydrated lime, giving better workability and bond strength with brick and stone.
Quick Lime Lumps FAQ
What is Quick Lime, and how is it different from Hydrated Lime?
Quick Lime (Calcium Oxide, CaO) is produced by calcining limestone at high temperature, driving off carbon dioxide. It is highly reactive and generates significant heat when it comes into contact with water.
Hydrated Lime (Ca(OH)₂) is Quick Lime that has already been reacted with a controlled amount of water. Choose Quick Lime where you need that reaction heat and high reactivity, as in steelmaking; choose Hydrated Lime where you need a stable, ready-to-dose alkaline powder.
What lump sizes do you supply?
We supply three standard size ranges: 20-40 mm, 10-60 mm, and 5-25 mm. The material is also available as ground powder. Specify your required size range when you enquire.
Why does low MgO and low silica matter?
Our Quick Lime Lumps hold MgO at or below 1.5% and SiO₂ at or below 1.5%. In steelmaking, silica consumes lime in slag formation, so lower silica means less lime is needed per tonne of steel. Controlled magnesia matters for slag chemistry and for downstream chemical applications where impurities carry through into the product.
How should Quick Lime be stored?
Quick Lime reacts with moisture in the air, so it should be kept in sealed bags in a dry, covered store and used in the order received. Handle with appropriate protective equipment, as the reaction with water is exothermic.
Do you deliver outside Rajasthan?
Yes. We dispatch by road and rail from Jodhpur to industrial destinations across India. We also supply buyers overseas. Share your delivery location with your enquiry and we will confirm logistics and lead time.
Need pricing for Quick Lime Lumps?
Leave your name and number. We will call back with grades, packing options and rates.