Limestone Powder Making Process

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Detailed Process to Make Powder Fertilizer from Limestone

Limestone powder is a versatile and useful material that has many applications in different industries. It is widely used as a raw material for cement, lime, plaster, paint, paper, rubber, and other products. Limestone powder can also be used as a filler, extender, or pigment in various products.

But how is limestone powder made? What are the steps involved in transforming limestone rock into fine powder particles? In this blog post, we will explore the limestone powder production process and its benefits.

The production process involves four main stages: quarrying, crushing, grinding, and packaging.

Quarrying: The first stage of limestone powder production is to extract limestone from natural deposits. Limestone is a sedimentary rock that consists mainly of calcium carbonate (CaCO3) and sometimes magnesium carbonate (MgCO3) or dolomite (CaMg(CO3)2). Limestone is formed by the accumulation of shells, coral, algae, and other marine organisms over millions of years. Limestone deposits are found in many parts of the world, but only a small portion is suitable for lime production.

To quarry limestone, the rock is blasted or drilled and then loaded into trucks or conveyors for transportation to the crushing plant. The quality and quantity of limestone depend on factors such as the location, depth, and purity of the deposit.

Crushing: The second stage of limestone powder production is to reduce the size of the limestone fragments. Depending on the size of the feedstone required, limestone may go through a primary, secondary, or tertiary crusher to achieve the desired particle size. The crushers use compression, impact, or shear forces to break down the limestone into smaller pieces.

The crushed limestone is then screened into various sizes ranging from several inches to dust-sized particles. The sized limestone is then washed to remove impurities such as clay, sand, or organic matter.

Grinding: The third stage of limestone powder production is to grind the crushed and washed limestone into fine powder particles. This is done by using a grinding mill that can achieve high levels of fineness and uniformity in the particle size distribution.

There are different types of grinding mills available for limestone powder production, such as ball mill, Raymond mill, vertical mill, hammer mill, roller mill, etc. Each type has its own advantages and disadvantages depending on the required output and quality.

The grinding process involves feeding the limestone into the mill along with water or air. The mill rotates or vibrates to create friction and impact forces that grind the limestone into smaller particles. The ground limestone is then separated from the water or air by a classifier or a cyclone.

Packaging: The final stage of limestone powder production is to pack the ground limestone into bags or containers for storage or transportation. The packaging process involves weighing, filling, sealing, labeling, and palletizing the bags or containers.

The packaging material should be durable and resistant to moisture, heat, and light. The packaging should also indicate the product name, weight, grade, origin, and expiration date.

Benefits of Limestone Powder

Limestone powder has many benefits for various industries and applications. Some of them are:

– Cement: Limestone powder is an essential ingredient in cement production. It acts as a binder that holds together the other components such as sand and gravel. Limestone powder also improves the hydration and strength of cement.
– Lime: Limestone powder can be calcined (heated) to produce lime (CaO), which is used for various purposes such as soil stabilization, water treatment, flue gas desulfurization, paper making, etc.
– Plaster: Limestone powder can be mixed with water and gypsum to produce plaster (CaSO4·2H2O), which is used for coating walls and ceilings. Plaster provides a smooth and durable surface that can be painted or decorated.
– Paint: Limestone powder can be used as a pigment or filler in paint production. It enhances the color, opacity, gloss, and durability of paint. Limestone powder also reduces the cost and environmental impact of paint production.
– Rubber: Limestone powder can be used as a filler or extender in rubber production. It improves the elasticity, strength, abrasion resistance, and aging resistance of rubber. Limestone powder also reduces the amount of synthetic rubber needed.
– Paper: Limestone powder can be used as a filler or coating agent in paper production. It improves the brightness, smoothness, opacity, printability, and strength of paper. Limestone powder also reduces the amount of wood pulp needed.


Limestone powder is a valuable material that has many uses in different industries and applications. It is produced by quarrying, crushing, grinding, and packaging limestone rock into fine powder particles. Limestone powder offers many benefits such as improving the quality and performance of various products while reducing costs and environmental impacts.

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Engineer in fertilizer production and machinery development and research, served in the industry since 2001. All the industrial leading information about the bio, organic, npk, compound fertilizer production technology & equipment, welcome contact.

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