The origin of limestone and Changtu
limestone are common minerals in the world, and its main component is calcium carbonate. The sources of calcium carbonate are quite extensive and distributed in nature.

Looking at its source, there are many limestone deposits between mountains and rivers. After a long period of geological changes, various minerals interact, and calcium carbonate then accumulates in the form of limestone. On the seashore, shells and other biological remains have been worn and deposited over time, and they are also one of the sources of calcium carbonate. During the growth process, many organisms ingest calcium from the environment, and their shells accumulate after death. After complex geological processes, calcium components participate in the formation of calcium carbonate.

As for its common use, the construction field bears the brunt. Limestone can be calcined to obtain quicklime. After quicklime is ripened with water, it can be used to prepare lime mortar. In masonry, plastering and other projects, it has the effect of bonding masonry and making the building structure more stable. The made lime paste is also a common material for decorative walls, giving the wall a smooth and smooth feeling.

Furthermore, in the chemical industry, calcium carbonate is also widely used. As an important chemical raw material, it can be used to make cement. In the cement production process, limestone and clay and other raw materials are mixed in proportion, calcined and ground, and the resulting cement is an indispensable material for modern buildings. And in the plastics and rubber industries, calcium carbonate is often added as a filler. It can enhance the hardness and stability of plastic products, improve the processing performance of rubber, reduce production costs and improve product quality.

In agriculture, calcium carbonate also contributes. If the soil is too acidic, the application of limestone powder can neutralize the acidity of the soil, improve the soil structure, create a suitable environment for crop growth, promote the development of crop roots, and improve yield and quality.

In summary, calcium carbonate is rich in sources and is widely used in many fields such as construction, chemical industry, and agriculture. It has a profound impact on human production and life.