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Production method of common light calcium carbonate

A light calcium carbonate, production method technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc. Improve the whiteness, the best effect, the effect of improving the whiteness

Inactive Publication Date: 2017-12-29
广西华洋矿源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention of the present invention is, in view of the above-mentioned problem, provide a kind of production method of common light calcium carbonate, solve the particle size of the product in the production process, the viscosity is difficult to control and the problem that calcium carbonate whiteness is not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of production method of common light calcium carbonate, comprises the steps

[0032] 1) Raw material preparation:

[0033] Limestone: Chemical composition by weight: CaO54%, MgO1.0%, SiO 2 1.5%, Mn≤0.006%, Fe 2 o 3 0.1% and impurity 0.2%; physical property requirements: dense block, no recrystallization, porosity 1%, density: 2.80g / cm3, Mohs hardness 3 and compressive strength 117.6Mpa; limestone entering the kiln is crushed to particle size 150mm; for the ore containing clay or mud balls, it needs to be washed after crushing to remove the soil and impurities;

[0034] Water: suspended matter 20 mg / L, transparency 30 cm, hydrochloric acid insoluble matter (SiO 2 ) 10 mg / L, magnesium oxide (MgO) 100 mg / L, iron oxide (Fe 2 o 3 ) 10 mg / L;

[0035] Coke components and the weight ratio of each component are as follows: fixed carbon 80%, moisture 3%, volatile matter 4.5%, ash 12%, and sulfur 0.5%, particle size 40mm, calorific value 29309KJ / kg;

[0036] 2) Calc...

Embodiment 2

[0048] A kind of production method of common light calcium carbonate, comprises the steps

[0049] 1) Raw material preparation:

[0050] Limestone: Chemical composition by weight: CaO57%, MgO1.5%, SiO 2 1%, Mn0.004%, Fe 2 o 3 0.08% and impurity 0.15%; physical property requirements: dense block, no recrystallization, porosity 0.8%, density: 2.7g / cm3, Mohs hardness 3. and compressive strength 117.6Mpa; the limestone entering the kiln is crushed to particle size 120mm; for the ore containing clay or mud balls, after crushing, it is necessary to wash the ore to remove the soil and impurities;

[0051] Water: suspended matter 20 mg / L, transparency 30 cm, hydrochloric acid insoluble matter (SiO 2 ) 10 mg / L, magnesium oxide (MgO) 100 mg / L, iron oxide (Fe 2 o 3 ) 10 mg / L;

[0052] The fuel is a mixture of anthracite and bituminous coal at a weight ratio of 1:1. The anthracite composition and the weight ratio of each composition are as follows: fixed carbon 75%, moisture 6%, vo...

Embodiment 3

[0065] A kind of production method of common light calcium carbonate, comprises the steps

[0066] 1) Raw material preparation:

[0067] Limestone: Chemical composition by weight: CaO54%, MgO1.0%, SiO 2 1.5%, Mn0.006%, Fe 2 o 3 0.1% and impurities; physical property requirements: dense block, no recrystallization, porosity ≤ 1%, density: 2.65-2.80g / cm3, Mohs hardness 3 and compressive strength 117.6Mpa; limestone entering the kiln is crushed to particle size 80mm; for the ore containing clay or mud balls, it is necessary to wash the ore after crushing to remove the soil and impurities;

[0068] Water: suspended matter 20 mg / L, transparency 30 cm, hydrochloric acid insoluble matter (SiO 2 ) 10 mg / L, magnesium oxide (MgO) 100 mg / L, iron oxide (Fe 2 o 3 ) 10 mg / L;

[0069] Fuel: coke components and the weight ratio of each component are as follows: 80% fixed carbon, 3% water, 4.5% volatile matter, 12% ash, 0.5% sulfur, particle size 40mm, calorific value 29309KJ / kg;

[00...

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Abstract

The invention discloses a production method of common light calcium carbonate, and belongs to the field of a production method of calcium carbonate. In a production process, limestone is taken as a main raw material, and requirements on auxiliary raw materials of water and fuel are higher; the limestone and the fuel are calcined to obtain lime and carbon dioxide, a digestion reaction is performed on the lime and the water to obtain calcium hydroxide emulsion, and a carbonization reaction is performed on the carbon dioxide and the calcium hydroxide emulsion to obtain the light calcium carbonate. According to the production method, the problem that the particle size and the viscosity of a product in the production process are difficult in control can be solved, continuous production can be realized by using conventional equipment, the product is good and stable in quality, and the whiteness of the calcium carbonate produced by the production method reaches 95-97 degrees.

Description

technical field [0001] The invention relates to a method for producing calcium carbonate, in particular to a method for producing ordinary light calcium carbonate. Background technique [0002] Calcium carbonate products are an important part of the inorganic salt industry. Among the 22 product lines of my country's inorganic salt industry, the output of calcium carbonate is second only to phosphate, sulfate and silicate, ranking fourth. There are two series of calcium carbonate products: one series is to use mechanical methods to process natural calcium carbonate ore to an appropriate particle size, which is called heavy calcium carbonate in the world, or GCC for short in English; the other series is based on natural calcium carbonate ore. The raw material is prepared by chemical methods such as calcination, digestion, carbonization, etc., and the crystalline product formed by precipitation is usually called precipitated calcium carbonate or light calcium carbonate in the w...

Claims

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Application Information

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IPC IPC(8): C01F11/18C04B2/06C04B2/10
CPCC01F11/181C01F11/185C01P2004/61C01P2006/60C01P2006/80C04B2/063C04B2/108
Inventor 李文康张宸宇欧西江
Owner 广西华洋矿源材料有限公司
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