Heavy calcium carbonate is a calcium carbonate powder material produced by mechanical crushing method using calcite, chalk, marble and other ores as raw materials. It has the characteristics of wide source of raw materials, high whiteness, low oil absorption value, good applicability and low price. It is currently the most widely used inorganic non-metallic mineral powder product with the largest consumption.

At present, the fine processing technology of heavy calcium carbonate mainly focuses on grinding and surface modification to process products that meet the fineness requirements of different application fields, including fine powder, ultrafine powder, surface modified (active) powder and papermaking slurry includes several categories and more than ten kinds of special heavy calcium carbonate products with different fineness and surface modification and activation. So what equipment processes calcium carbonate powder?HCM Machinery is a well-known manufacturer of calcium powder processing machinery and equipment in the industry. Today we will introduce you to calcium powder processing machinery and equipment in detail.

Detailed explanation of calcium powder processing machinery and equipment:

Ordinary heavy calcium carbonate with d97≥5μm is mainly produced by dry method. The equipment includes improved Raymond mill (hanging roller mill or pendulum mill), roller mill (including pressure roller mill/vertical mill, ring roller mill, etc. ) and ball mill, etc.

Ultrafine heavy calcium carbonate with d97≥5μm generally adopts dry production process, and some use wet grinding + drying process. Dry production mainly uses drum ball mills + classifiers, roller mills (including ring roller mills with in-band classification, vertical mills/pressure roller mills), dry mixing mills + classifiers, etc.

Papermaking coating grade ultra-fine heavy calcium carbonate slurry with d97≤5μm, especially d90≤2μm, is generally produced by wet method, and the main equipment is a stirring mill and a sand mill.

The ball mill + classifier production line is mainly used to produce heavy calcium carbonate fine powder and ultrafine powder with d97=5~43μm. It is characterized by continuous closed-circuit production, multi-stage classification, large cycle load (300%~500%), and large single machine production capacity . This production line has been used since the mid-to-late 1990s and is one of the main production technologies for large-scale ultra-fine heavy calcium carbonate production lines in the world today.

Ring roller mill is the most widely used fine grinding and ultra-fine grinding equipment in the field of heavy calcium carbonate in China in the past ten years. It is characterized by a large crushing ratio and low energy consumption per unit product. The internal or external fine classifier can produce ultra-fine products with d97≤10μm. The product fineness can be adjusted between d97=5~40μm; the most suitable product particle size range is d97=10~30μm.

Roller mill (vertical roller mill/roller mill) is one of the main large-scale equipment for fine grinding and ultra-fine grinding of heavy calcium carbonate. It is characterized by a large crushing ratio. The most suitable product particle size range is d97=15~45μm. After an external fine classifier is installed, it can produce ultra-fine products with d97≤10μm. The product has good particle shape and low oil absorption value, which is especially suitable for production. Unsaturated polyester-based composite materials (artificial stone) use heavy calcium carbonate fillers, and have low energy consumption and wear per unit product.

Wet ultrafine grinding technology is mainly used to produce papermaking coating (slurry) grade products with d90≤2μm and d97≤2μm, and ultrafine heavy calcium carbonate with d60≤2μm (used as plastic filler after drying). Generally, one or two stages of continuous ultra-fine grinding process are used. It mainly consists of a wet mixing grinder or sand mill and corresponding storage tanks and pumps.

The production capacity of ordinary heavy calcium in the domestic market has become saturated, and the product price is low, and the technological content and added value are not high. For ultra-fine and active heavy calcium, domestic production capacity cannot meet the demand and still has great market potential. Overall, the main development trends of heavy calcium carbonate industry technology are large-scale, functional and intelligent. This is an inevitable requirement for the intensification, stabilization, structural optimization or specialization of heavy calcium carbonate production, as well as improving production efficiency, reducing energy consumption, wear and tear and reducing production costs. It is also an inevitable requirement for the development of production technology due to the significant increase in market demand and saving the amount of resin in polymer-based composite materials.It is necessary for domestic heavy calcium carbonate companies to learn from the successful experiences of world-famous calcium carbonate companies such as Omya and Imerys, and adopt high-efficiency, energy-saving large-scale equipment and advanced production technology to promote the in-depth development of my country’s heavy calcium carbonate industry in terms of scale and product refinement.As an equipment supplier recognized by Omya, HCM has provided calcium powder processing machinery and equipment to many Omya factories around the world, which are highly praised and favored by customers. If you have purchasing needs for calcium powder processing machinery and equipment, please contact us for details of the equipment. Email:hcmkt@hcmilling.com