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Clinker-free high-performance cement prepared from metallurgical slag

A clinker-free, high-performance technology, applied in cement production, etc., can solve problems such as polluting the environment and destroying the natural environment

Pending Publication Date: 2018-09-28
武汉重德环保工程有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only destroys the natural environment, but also the CO produced by burning clinker 2 , dust, SO 2 and NO x Toxic and harmful substances will seriously pollute the environment

Method used

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  • Clinker-free high-performance cement prepared from metallurgical slag
  • Clinker-free high-performance cement prepared from metallurgical slag
  • Clinker-free high-performance cement prepared from metallurgical slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Embodiment 1: Preparation of clinker-free high-strength cement of the present invention

[0076] The implementation mode of this embodiment is as follows:

[0077] Use the processing steel slag obtained by the No. 3 steelmaking plant of Wuhan Iron and Steel Group during steelmaking, adopt the method described in CN101280346B to process, and have an iron content of 0.05% by weight; ; the water slag obtained by the ironmaking plant of Wuhan Iron and Steel Group when the molten iron in the ironmaking plant is desulfurized; the desulfurized gypsum provided by the second steelmaking plant of Wuhan Iron and Steel Group, the waste digested lime provided by the second steelmaking plant of Wuhan Iron and Steel Group, and the Lignosulfonate sold by Tingruo Chemical Company under the trade name Shanghai Tingruo; the specific surface area of ​​the steel slag, water slag, desulfurization slag, desulfurization gypsum, waste digested lime and water reducing agent is 350-450m 2 / kg, p...

Embodiment 2

[0082] Embodiment 2: Preparation of clinker-free high-strength cement of the present invention

[0083] The implementation mode of this embodiment is as follows:

[0084] Use the processing steel slag obtained by Ningbo Steel Works during steelmaking, adopt the method described in CN101280346B to process, and have an iron content of 0.30% by weight; water slag obtained by Ningbo Steel Works during ironmaking; Desulfurization slag obtained from desulfurization treatment in iron works before molten iron enters the converter; desulfurization gypsum provided by Ningbo Steel Works, waste digested lime provided by Ningbo Steel Works, naphthalene sold under the trade name Zhe Chuang by Shangyu Zhechuang Chemical Co., Ltd. Sulfonate formaldehyde polymer; the specific surface area of ​​the treated steel slag, water slag, desulfurization slag, desulfurization gypsum, waste digested lime and water reducing agent is 450-550m 2 / kg, particle size gradation is 20% by weight if the particle...

Embodiment 3

[0089] Embodiment 3: Preparation of clinker-free high-performance cement of the present invention

[0090] The implementation mode of this embodiment is as follows:

[0091] Use the treatment electric furnace slag obtained by Daye Iron and Steel Co., Ltd. during electric furnace steelmaking, adopting the method described in CN101280346B, and having an iron content of 0.22% by weight; water slag obtained by Echeng Iron and Steel Company during ironmaking ; Desulfurization slag obtained by Echeng Iron and Steel Company from the desulfurization treatment of molten iron before entering the converter; desulfurization gypsum obtained by Baosteel during desulfurization of molten steel, waste digested lime provided by Wuhan Iron and Steel Group Iron Plant, and Shanghai Qinhe The melamine-based water reducer sold by the Chemical Co., Ltd. under the trade name Qinhe Chemical; the specific surface area of ​​the steel slag, water slag, desulfurization slag, desulfurization gypsum, waste d...

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Abstract

The invention relates to clinker-free high-performance cement. The clinker-free high-performance cement is prepared from treated steel slag, granulating slag, desulfurized slag, desulfurized gypsum, unslaked lime and a water reducer. The clinker-free high-performance cement building material has the remarkable advantages of high strength, high durability, high anti-permeability performance, high anti-freezing performance, high seawater corrosion resistance, high carbonization resistance and the like which are not possessed by conventional cement, and is beneficial for improvement of the engineering quality and reduction of the engineering cost. The problems that the solid waste occupied space of staple industries is large, soil and underground water are seriously polluted, and CO2 emissionin existing cement production is serious are well solved. If in China, the clinker-free high-performance cement is used for partially replacing the conventional cement, great economic and social benefits can be brought, the CO2 emission can be reduced by hundreds of millions tons every year, and great significance is achieved for improving the environment undoubtedly.

Description

【Technical field】 [0001] The invention relates to the technical field of building materials. More specifically, the invention relates to a clinker-free high-performance cement prepared from metallurgical slag. 【Background technique】 [0002] At present, no matter what kind of cement is being used in China, clinker needs to be added. Clinker is the main ingredient in the production of cement, and its consumption is even as high as 60-70% of the total weight of cement raw materials. The clinker is fired from limestone. Extracting rocks from mountains is a destruction of nature. Transporting, crushing and firing clinker consumes energy and pollutes the environment. In 2017, my country produced about 2.3 billion tons of cement, and the world produced about 4 billion tons of cement. Every ton of conventional cement produced will produce 1 ton of CO 2 , Not only that, in order to produce these cements need to open mountains and take rocks. Not only destroys the natural envi...

Claims

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Application Information

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IPC IPC(8): C04B7/153C04B7/24
CPCC04B7/153C04B7/24Y02P40/10
Inventor 冀更新马金山
Owner 武汉重德环保工程有限责任公司
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