Method for preparing cement clinker from high-magnesium high-alkali limestone
A cement clinker, high-magnesium and high-alkali technology, applied in cement production, etc., can solve the problems of thick kiln skin, unfavorable kiln stable production, blockage, etc., and achieve the effect of reducing mining cost, high strength, and obvious social and economic benefits
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Embodiment 1
[0042] A method for preparing cement clinker from high-magnesium and high-alkali limestone, the following steps:
[0043] Step S1: crush the high-magnesium and high-alkali limestone and put it into the limestone pre-homogenization yard for homogenization; wherein, the high-magnesium and high-alkali limestone used comes from Datong area of Shanxi, wherein the calcium oxide content is 45.3%, the alkali content is 1.06%, and the oxidation The magnesium content is 4.3%.
[0044] Step S2: Determine that coal gangue is aluminum raw material (see Table 1 for its chemical composition), sandstone is siliceous raw material (see Table 1 for its chemical composition), and iron ore waste rock is iron raw material (its chemical composition is shown in Table 1) through the flammability test. The composition is shown in Table 1), the raw material contains 88% limestone, 7% sandstone, 4.3% coal gangue, and 2.6% iron ore waste rock by weight in the raw material; Silicon ratio SM=2.50±0.1, al...
Embodiment 2
[0053] A method for preparing cement clinker from high-magnesium and high-alkali limestone, the following steps:
[0054] Step S1: crush the high-magnesium and high-alkali limestone into the limestone pre-homogenization yard for homogenization; wherein, the high-magnesium and high-alkali limestone used is as in Example 1.
[0055] Step S2: The chemical composition of the raw materials used is as in Example 1. The raw materials contain 90% limestone, 8% sandstone, 5% coal gangue, and 1% iron ore waste rock in parts by weight; and the clinker rate value is determined: saturation ratio KH=0.91±0.02, silicon ratio SM=2.50±0.1, aluminum ratio IM=1.55±0.1.
[0056] Step S3: The raw materials are batched by an online analyzer, and then put into a raw meal mill for grinding to obtain a raw meal. The fineness of the raw meal is 100 μm, and the sieve residue is 12.0.
[0057] Step S4: Put the raw meal into the rotary kiln for calcination, the fuel used for calcination is bituminous coa...
Embodiment 3
[0061] A method for preparing cement clinker from high-magnesium and high-alkali limestone, the following steps:
[0062] Step S1: crush the high-magnesium and high-alkali limestone into the limestone pre-homogenization yard for homogenization; wherein, the high-magnesium and high-alkali limestone used is as in Example 1.
[0063] Step S2: The chemical composition of the raw materials used is as in Example 1. The raw materials contain 88% of limestone, 7% of sandstone, 4.3% of coal gangue, 2.6% of waste iron ore, 0.08% of molybdenite, and 0.13% of perovskite in parts by weight. ; And determined the clinker rate value: saturation ratio KH = 0.91 ± 0.02, silicon rate SM = 2.50 ± 0.1, aluminum rate IM = 1.55 ± 0.1.
[0064] Step S3: The raw materials are batched by an online analyzer, and then put into a raw meal mill for grinding to obtain a raw meal. The fineness of the raw meal is 80 μm, and the sieve residue is 13.0.
[0065] Step S4: Put the raw material into the rotary kil...
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