Lime industry - Foundation develop other industries

Manufacturing principles

Limestone is calcium carbonate (CaCO3), is made up of all kinds of shells or bones from millions of years ago. Most commercial limestone quarry is a brown stone softish. Crushed limestone has many uses. The production starts with limestone quarrying and crushing limestone. Limestone is a generic term covering many types of sedimentary rocks. Limestone can be classified as either high calcium or dolomite. Limestone is 100% calcium carbonate (calcite or aragonite 100 percent). Purity limestone has no natural place. High-quality, high-calcium limestone High-quality, high-calcium limestone contains 97-99% calcium carbonate and 1-3% impurities. Dolomite limestone usually contains 40-43% magnesite, 1-3% of impurities.

Industrial lime kilns

Limestone is turned into lime (calcium, or burned lime) are baked in the oven. The chemical production is calcium oxide (CaO).

CaCO3 + heat -> CaO + CO2
The process involves adding water to continue in a process known as wet, which produces hydrated, or slaked lime. Lime less caustic than lime, thus easier to handle, but less efficient per unit weight than calcium, therefore less economic.

CaO + H2O -> Ca (OH) 2
Lime has been a very important material since ancient times, used in the construction industry. In addition, calcium is also widely used in metal refining, especially steel manufacturing, agriculture, food industry, and in the production of cement. In fact lime is one of the chemicals most widely used.

Currently, lime production is a major industry, requires large investments in capital equipment to competitive activity.

Application of lime industry in the manufacturing sector:

1. Use of crushed limestone in coal mines to reduce coal dust, which reduces the risk of explosion.

2. Agriculture: lime fertilizer increases efficiency. When the acid soil, we need to raise the pH of the soil, improving calcium and magnesium, promote microbial activity, increased release rate of soil organic matter and nutrient elements.

3. Aluminum industry: Lime helps remove silica from bauxite ore in the production of alumina.

Lime is a very popular application in construction industry

4. Construction industry: Lime is used in the production of silicon lime bricks, insulation and construction materials. Lime mortar was used in place of bricks and make the walls. Moreover, lime is also added to concrete and mortar to improve the performance of construction Structure ..

5. Food Industry: lime reacts with water to produce raw sugar and both the sugar beet. Lime is an ingredient in baking soda and help keep fruits and vegetables fresh.

6. Industrial Waste water treatment: Lime neutralizes acid waste generated in the industry thus hindering corrosion and protect the natural environment .. Lime also removes silicon, manganese, fluoride, iron and other impurities in the water.

7. Metal Mining Industry: Lime is also used in metal mining PROFIT such as copper, mercury, zinc, nickel, gold, lead and silver.

:: 8. Manufacture of paper pulp and paper manufacturers use lime to recover caustic soda in the process of conversion of wood chips to pulp. Lime bleached pulp and cellulose soluble components from decomposing straw and fiber while manufacturing it strawboard and pasteboard.

9. Pollution Control: Lime and limestone are used to absorb sulfur dioxide from exhaust gases in smelters and power plants.

10. Waste water treatment: Lime reduces pollution by eliminating the organic matter, phosphate and nitrogen from wastewater. It prevents on vegetation in lakes, control odors from waste ponds and heavy metal precipitation

11. Steel industry: Lime is used as a flux for steel purification and removal, sulfur and phosphorus, silicon impurities. Lime lubricated steel bars as they are drawn through the mold to form wires. Create a coating, calcium prevents the embryo attaches to the cast iron mold. Lime neutralizes acid stain remover for steel products.

12. Lime removal plump hair and skin preparation for tanning.

13. Water treatment: industrial water treatment lime supplies, clean drinking water, including the city and water treatment for industrial use .. It softens water by removing hardness and bicarbonate disinfection against bacteria.

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