Method for preparing expanded concrete clinker by utilizing low-grade limestone

A low-grade limestone and expanded clinker technology, applied in the field of comprehensive resource utilization, can solve the irreversible impact of sustainable development of mineral resources and other issues, and achieve the effect of increasing market competitiveness, reducing burning heat consumption, and strong market competitiveness

Active Publication Date: 2019-11-05
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Aiming at the problems that high-grade limestone, gypsum and bauxite are commonly used as raw materials in the current preparation process of expansion clinker and expansion agent, which bring irreversible impact on the sustainable development of mineral resources, the present invention provides a method for preparing Concrete expansion clinker and preparation method thereof

Method used

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  • Method for preparing expanded concrete clinker by utilizing low-grade limestone
  • Method for preparing expanded concrete clinker by utilizing low-grade limestone
  • Method for preparing expanded concrete clinker by utilizing low-grade limestone

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The concrete expansion clinker of embodiment 1 of the present invention is made up of following raw material by weight part:

[0043]

[0044] The preparation method of the present embodiment 1 concrete expansion clinker comprises the steps:

[0045] ⑴ First, 50 parts of low-grade limestone and 15 parts of high-alumina coal gangue are mixed in proportion and sent to a ball mill for grinding to 200 mesh, and then sent to the mixed material warehouse for storage;

[0046] ⑵Carbide slag is loaded into the feeding box through the loader, and sent to the impeller feeder through the discharge conveyor and belt conveyor, and then the dispersed calcium carbide slag is fed into the cyclone dryer through the disperser, and is separated from the kiln The hot flue gas introduced at the end is fully heat-exchanged, and the dried calcium carbide slag powder is collected by the cyclone dust collector and sent to the calcium carbide slag dry powder warehouse for storage;

[0047] (...

Embodiment 2

[0054] Embodiment 2 of the present invention The concrete expansion clinker consists of the following raw materials in parts by weight:

[0055]

[0056] The preparation method of the present embodiment 2 concrete expansion clinker comprises the steps:

[0057] ⑴ First, 55 parts of low-grade limestone and 10 parts of high-alumina coal gangue are mixed in proportion and sent to a ball mill for grinding to 250 mesh, and then sent to the mixed material warehouse for storage;

[0058] ⑵Carbide slag is loaded into the feeding box through the loader, and sent to the impeller feeder through the discharge conveyor and belt conveyor, and then the dispersed calcium carbide slag is fed into the cyclone dryer through the disperser, and is separated from the kiln The hot flue gas introduced at the end is fully heat-exchanged, and the dried calcium carbide slag powder is collected by the cyclone dust collector and sent to the calcium carbide slag dry powder warehouse for storage;

[005...

Embodiment 3

[0066] Embodiment 3 of the present invention Concrete expansion clinker is made up of following raw material by weight part:

[0067]

[0068] The preparation method of present embodiment 3 concrete expansion clinker comprises the steps:

[0069] ⑴ Firstly, 50 parts of low-grade limestone and 10 parts of high-alumina coal gangue are mixed in proportion and then sent to a ball mill for grinding to 200 mesh, and then sent to the mixed material warehouse for storage;

[0070] ⑵Carbide slag is loaded into the feeding box through the loader, and sent to the impeller feeder through the discharge conveyor and belt conveyor, and then the dispersed calcium carbide slag is fed into the cyclone dryer through the disperser, and is separated from the kiln The hot flue gas introduced at the end is fully heat-exchanged, and the dried calcium carbide slag powder is collected by the cyclone dust collector and sent to the calcium carbide slag dry powder warehouse for storage;

[0071] ⑶ Sen...

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Abstract

The invention discloses a method for preparing a concrete expanded clinker by utilizing low-grade limestone. Low-grade limestone tailing is used as a main calcium raw material; acetylene sludge is used as an adjusting material for the calcium raw material; desulfurization gypsum is used as a sulfur raw material; high alumina gangue is used as an aluminum raw material; and the concrete expanded clinker is prepared from the following raw materials in parts by weight: 50-55 parts of low-grade limestone, 25-30 parts of acetylene sludge, 5-15 parts of desulfurization gypsum and 10-15 parts of high alumina gangue. The invention develops a new method for preparing the concrete expanded clinker in the manner of treating waste with waste, can efficiently solve the social problem of the pollution to ecological environment by industrial waste, can realize the resource reutilization, can reduce the production cost of the concrete expanded clinker, can promote the market competitiveness of the concrete expanded clinker and has obvious social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of comprehensive resource utilization, and more specifically relates to a method for preparing concrete expansion clinker by using low-grade limestone. Background technique [0002] Cement concrete is a kind of hydraulic cementitious material. During its hydration and hardening process, the volume will shrink. The shrinkage under the constraints will generate shrinkage stress inside the structure. When the stress exceeds the tensile strength of the concrete, it will cause the concrete to crack and form Shrinkage cracks. In order to suppress the cracking of cement concrete caused by shrinkage, various methods such as adding fibers, shrinkage reducing agents, curing agents, and evaporation reducing agents can be used. expansion to compensate for concrete shrinkage. According to the type of expansion source, the expansion agent can be divided into ettringite type, calcium oxide type and magnesium oxide type. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14
CPCC04B22/142
Inventor 张守治田倩王育江陆安群姚婷王瑞
Owner JIANGSU SOBUTE NEW MATERIALS
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