Lime is one of the most versatile materials used across construction, infrastructure, water treatment, mining, manufacturing and agriculture. Produced from naturally occurring limestone, lime products are used in a wide range of applications that support modern industry and everyday life. From helping provide clean drinking water to improving roads, supporting mining operations and managing soil acidity, lime plays an important role throughout Australia.
While the term "lime" is often used broadly, there are several different lime products available, each designed for specific applications and performance requirements.
What Is Lime Made From?
Lime begins as limestone, a naturally occurring sedimentary rock primarily composed of calcium carbonate. Limestone deposits are quarried and processed to create a range of lime products used across multiple industries.
At Boral's Marulan South Limestone Mine in New South Wales, limestone is extracted and supplied for both cement manufacture and lime production. The site supports the supply of materials used across construction, water treatment, agriculture, mining and industrial applications.
How Is Lime Made?
The production of lime involves heating limestone at high temperatures in a kiln. During this process, known as calcination, carbon dioxide is released from the limestone, producing quicklime (calcium oxide).
Quicklime can then be combined with water through a controlled hydration process to produce hydrated lime (calcium hydroxide). Different processing methods and specifications result in products designed for a variety of industrial, environmental and agricultural applications.
Types of Lime
Quicklime
Quicklime, also known as calcium oxide (CaO), is a highly reactive lime product produced through the calcination of limestone. It is commonly used in steel manufacturing, mining, water treatment and industrial processing applications where rapid chemical reaction is required.
Hydrated Lime
Hydrated Lime, also known as calcium hydroxide (Ca(OH)₂), is produced by adding water to quicklime. It is widely used in soil stabilisation, water treatment, asphalt production, environmental treatment and industrial applications.
Premium Hydrated Lime
Premium Hydrated Lime is a specialised hydrated lime product manufactured for demanding treatment and industrial applications where consistency, reactivity and process performance are critical. Common uses include drinking water treatment, environmental treatment and industrial processing.
Agricultural Lime
Agricultural Lime, often referred to as aglime, is a finely ground limestone product used to help manage soil acidity and support productive farming systems. Unlike quicklime and hydrated lime, it is primarily used for soil improvement and agricultural applications.
What Is Lime Used For?
Lime products are used across a diverse range of industries and applications. Common uses include:
- Soil stabilisation and road construction
- Drinking water and wastewater treatment
- Mining and mineral processing
- Steel manufacturing and metallurgical processing
- Asphalt production
- Industrial and environmental treatment applications
- Agriculture and soil conditioning
The specific lime product selected depends on the application, performance requirements and operational objectives.
Lime in Construction and Infrastructure
One of the most common uses for lime is in construction and infrastructure projects. Hydrated Lime and Quicklime are widely used in soil stabilisation applications to improve soil strength, workability and long-term pavement performance. Lime is also used in asphalt production and the manufacture of construction materials.
Lime in Water Treatment
Lime products are commonly used in drinking water treatment, wastewater treatment and process water applications. Depending on the treatment process, lime may be used for pH adjustment, water softening, coagulation and impurity removal.
Lime in Mining and Industry
Mining and industrial operations use both Quicklime and Hydrated Lime in mineral processing, metallurgical applications, environmental management and water treatment systems. These products support a range of treatment and manufacturing processes throughout Australia.
Lime in Agriculture
Agricultural Lime is used to help manage soil acidity, improve soil conditions and support productive farming systems. Managing soil pH is an important part of maintaining crop and pasture performance, and agricultural lime is widely used across Australian agriculture.
Choosing the Right Lime Product
Different applications require different lime products.
| Application | Recommended Product |
|---|---|
| Soil stabilisation and road construction | Hydrated Lime |
| Drinking water treatment | Premium Hydrated Lime |
| Wastewater and process water treatment | Hydrated Lime or Premium Hydrated Lime |
| Steel manufacturing | Quicklime |
| Mining and mineral processing | Quicklime or Hydrated Lime |
| Soil conditioning and agriculture | Agricultural Lime |
The most suitable product will depend on project requirements, industry standards and operational objectives.
Learn More About Boral Lime Products
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