Cement clinker produced by use of copper-lead tailings and sulfuric acid residues and production method thereof

A technology for cement clinker and copper-lead tailings, which is applied in the field of cement clinker, can solve the problems of low clinker strength and high heat consumption of clinker, and achieve the effects of reducing sintering temperature, reducing coal consumption and improving hydration speed.

Active Publication Date: 2014-02-26
GEZHOUBA DANGYANG CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Limestone raw material contains crystalline SiO 2 High, using traditional clay and iron ore to produce Portland cement clinker not only has high heat consumption but also low clinker strength

Method used

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  • Cement clinker produced by use of copper-lead tailings and sulfuric acid residues and production method thereof
  • Cement clinker produced by use of copper-lead tailings and sulfuric acid residues and production method thereof
  • Cement clinker produced by use of copper-lead tailings and sulfuric acid residues and production method thereof

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Embodiment 1

[0022] Limestone, copper-lead tailings, sulfuric acid slag, and sandstone raw materials are prepared according to the ratio of limestone 83-85%, copper-lead tailings 12-14% sulfuric acid slag 0.5-1.5% red sandstone 1-3%) to prepare raw meal, of which The chemical composition of the raw meal and its proportion to the total mass is SiO 2 : 12-13%, Al 2 o 3 : 2.9-3.1%, Fe 2 O3: 1.9-2.1, CaO: 43.-44%, and then mixed with raw materials, dried, ground, and ground into particles with a fineness of 80 μm, sieved ≤ 15% of mixed materials, and dried moisture ≤ 1.5 % dry powdery material (ie raw meal). After the raw meal is homogenized, it first enters the two-way first-stage preheater (the preheater is divided into first-stage, second-stage, third-stage, fourth-stage, and fifth-stage), and then enters the second-stage, third-stage, and fourth-stage respectively for preheating. And decompose, then enter the calciner to decompose CaCO3, and then enter the cement rotary kiln for calcin...

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Abstract

The invention discloses cement clinker and a production method thereof. The method comprises the steps of preheating copper-lead tailings, sulfuric acid residues, limestone and sandstone by a step-by-step preheater, then decomposing by a decomposing furnace to obtain CaCO3, and firing into cement clinker, wherein the fired clinker comprises chemical components and mineral components, wherein the chemical components of the fired clinker include SiO2, Al2O3, Fe2O3, CaO, MgO, R2O and SO3, and the mineral components include tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminum (C3A) and tetracalcium aluminoferrite (C4AF). The method is simple, can remarkably reduce coal consumption, reduces the standard consistency of the clinker to 24.0%, increases the strength to 61-62MPa, and can be applied to large-scale industry and production.

Description

technical field [0001] The invention relates to a cement clinker, which is produced by mixing copper-lead tailings and sulfuric acid slag, and also relates to a production method of the cement clinker. Background technique [0002] With the development of industry, especially the substantial increase in the production capacity of the metallurgical industry, a large amount of industrial waste and tailings are produced. The accumulation of tailings occupies a large amount of land and seriously pollutes the surrounding environment. How to comprehensively utilize waste slag and tailings is a subject to be solved in the treatment of three wastes. Using waste residue and tailings to produce high-quality cement is one of the important ways to solve the above problems. At present, the main raw materials for cement production are limestone, clay, iron ore, etc. Due to the current shortage of clay resources, and clay mining will destroy a lot of farmland It is explicitly restricted b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/38
CPCY02P40/10
Inventor 赵向东田太孝刘文盛
Owner GEZHOUBA DANGYANG CEMENT
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