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Cement clinker doped with tailing slag and ash slag and preparation method thereof

A technology of cement clinker and production method, which is applied in the direction of cement production, etc., which can solve the problems of affecting the economic benefits of cement enterprises, rising limestone costs, and high limestone consumption, so as to achieve the effects of ensuring strength, improving flammability, and alleviating resource pressure

Inactive Publication Date: 2021-02-12
广西河池国投鱼峰水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of limestone used is high, and it is easy to have the problem of poor flammability. At present, the supply of limestone is becoming increasingly tight, and the price of limestone is rising, which leads to a sharp increase in the cost of limestone, which directly affects the economic benefits of cement enterprises.

Method used

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  • Cement clinker doped with tailing slag and ash slag and preparation method thereof
  • Cement clinker doped with tailing slag and ash slag and preparation method thereof
  • Cement clinker doped with tailing slag and ash slag and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of raw meal: The raw meal is weighed according to the following raw materials by weight: limestone 79.0%, high-silica sandstone 4.8%, low-silica sandstone 10.7%, smelting slag 2.0%, tailing slag 2.0%, ash 1.5%, all raw materials Grinding, 0.08mm sieve fineness control ≤17%, 0.2mm sieve fineness ≤2.0%;

[0039]2. Clinker firing: the raw meal powder is preheated and decomposed for 60s to a temperature of 700°C and then fed into the rotary kiln. With the help of the inclination and rotation of the kiln, it slowly moves to the kiln head, and the kiln head coal is used in the firing zone. The burner provided by the powder sinters it into cement clinker for 25 minutes, and the sintered high-temperature clinker leaves the kiln and falls into the grate cooler. After crushing, it is unloaded on the chain bucket conveyor, and then transported by the chain bucket conveyor to the clinker yard of the combined warehouse. The rate range of clinker is shown in Table 1, ...

Embodiment 2

[0041] 1. Preparation of raw meal: The raw meal is weighed according to the following raw materials by weight: limestone 78.0%, high-silica sandstone 4.0%, low-silica sandstone 11.3%, smelting slag 2.5%, tailing slag 2.2%, ash slag 2.0%, all raw materials Grinding, 0.08mm sieve fineness control ≤17%, 0.2mm sieve fineness ≤2.0%;

[0042] 2. Clinker firing: the raw meal powder is preheated and decomposed for 50s to a temperature of 700 °C and then fed into the rotary kiln. With the help of the inclination and rotation of the kiln, it slowly moves to the kiln head, and the kiln head coal is used in the firing zone. The burner provided by the powder sinters it into cement clinker for 30 minutes, and the sintered high-temperature clinker leaves the kiln and falls into the grate cooler. After crushing, it is unloaded on the chain bucket conveyor, and then transported by the chain bucket conveyor to the clinker yard of the combined warehouse. The rate range of clinker is shown in Ta...

Embodiment 3

[0044] 1. Preparation of raw meal: Raw meal is weighed according to the following raw materials by weight: limestone 78.5%, high-silica sandstone 4.0%, low-silica sandstone 10.8%, smelting slag 2.0%, tailing slag 2.2%, ash slag 2.5%, all raw materials Grinding, 0.08mm sieve fineness control ≤17%, 0.2mm sieve fineness ≤2.0%;

[0045] 2. Clinker firing: the raw meal powder is preheated and decomposed for 55s to a temperature of 700°C and then fed into the rotary kiln. With the help of the inclination and rotation of the kiln, it slowly moves to the kiln head, and the kiln head coal is used in the firing zone. The burner provided by the powder sinters it into cement clinker for 28 minutes, and the sintered high-temperature clinker leaves the kiln and falls into the grate cooler. After crushing, it is unloaded on the chain bucket conveyor, and then transported by the chain bucket conveyor to the clinker yard of the combined warehouse. The rate range of clinker is shown in Table 1...

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Abstract

The invention discloses cement clinker doped with tailing slag and ash slag and a preparation method thereof, and belongs to the technical field of building materials, and the cement clinker comprisesthe following raw materials in percentage by weight: 74-81% of limestone, 3.0-12.5% of high-silicon sandstone, 3.0-16.0% of low-silicon sandstone, 2-6.5% of smelting slag, 1-3% of tailing slag and 1.5-3.0% of ash slag. The cement clinker is prepared through the procedures of raw material grinding and clinker sintering, the obtained cement clinker is superior to the GB / T21372 national standard, the strength of cement is guaranteed, energy conservation and yield increase are achieved, and resource utilization of waste residues can be achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a cement clinker mixed with tailing slag and ash and a preparation method thereof. Background technique [0002] Tailings slag and ash are by-products of the metal industry. The main chemical components of tailings slag are silica, iron oxide, alumina, calcium oxide, etc., and some also contain non-ferrous metals or rare metals; they are generally discharged from the concentrator in slurry form. , the particle size is usually 0.001 to 1 mm, and it is easy to dust and pollute the atmospheric environment after drying. Ash and slag refer to the final product formed after the minerals in coal are burned in the furnace under the high temperature caused by certain physical and chemical changes. Problems such as corrosion and heating surface wear affect the normal operation of the boiler, and the ash and slag must be removed effectively and timely. [0003] At present, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14C04B7/147C04B7/36C04B7/43
CPCC04B7/14C04B7/147C04B7/36C04B7/43Y02P40/10
Inventor 黄丽霖蒋林海梁茂华韦剑宁谭云军黄耀业唐文胜封柱文罗海波刘骥廖双双
Owner 广西河池国投鱼峰水泥有限公司
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