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Ecological cement, its preparation and application

A technology of ecological cement and water glass, applied in cement production, etc., can solve problems such as groundwater waste, surrounding environmental impact, and environmental pollution

Inactive Publication Date: 2006-06-21
张立省
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] In China, the cement industry uses a large number of refractory materials magnesia-chrome bricks. Magnesia-chrome bricks are easy to combine with sulfur to form hexavalent chromium salt compounds during use. The emergence of diseases, even cancer, my country has no relevant standards for the discharge of Pb, Sn, V, Sb, etc. in the cement industry, and there is not enough understanding. This is also a major hidden danger in the cement industry.
[0010] Also in our country, a large amount of industrial waste is stored in the open air, causing serious air, ground, and water pollution, especially the red mud produced in the production of alumina, which has always been a major problem in the world. For a long time, open-air piles have been used The technology of dam storage has seriously affected the surrounding environment, and continues to occupy a large amount of cultivated land, causing waste of groundwater sources. With the increase of alumina production, a large amount of red mud will be continuously discharged; and black A large amount of slag discharged from the metallurgical industry, such as titanium slag, phosphate slag, water quenching slag, etc., all cause serious pollution to the environment. In addition, the large amount of fly ash stored in the coal power industry undoubtedly causes environmental pollution. Another invisible killer, as well as various chemical industry waste residues, such as phosphorus slag, coal gangue, chemical waste gypsum, etc., are piled up and stored in large quantities. How to use these solid industrial wastes has become a common concern of all walks of life. topic
[0011] In addition, in nature, there are still a large number of natural resources that can be used, but the existing technology has not yet been able to utilize them. High-quality kaolin and volcanic ash raw materials have not been well utilized at present, and a large amount of industrial construction waste and waste from the silicate industry are also stored in large quantities, which seriously affects the overall environment and causes serious waste of resources. Living in a world of scarce resources, making full use of existing mineral resources to transform nature and beautify human life has become an important issue

Method used

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  • Ecological cement, its preparation and application
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  • Ecological cement, its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Embodiment 1: Ecological cement and preparation method, calculate with the weight ratio of original material:

[0104] (1) Material F: fly ash 15%, water quenched slag 40%, shale (unroasted) 6.4%, material F additives: calcium sucrose 0.1%, sodium polyphosphate 0.2%, triethanolamine 0.3%, F The batching ratio of materials: molar ratio [Si] / [Ca]=1.0, [Si] / [Al]=2.25.

[0105] In-situ grinding of incoming materials is adopted, and various available materials are added to the grinding mill together with additives for grinding. The particle size is controlled at 3% of the 200 mesh sieve, and the specific surface area is 4300cm 2 / g.

[0106] (2) P material: slag 5%, lime 13%, phosphorus slag 14.3%, P material additives: sodium lignosulfonate 0.2%, active milk of lime 0.5%, sodium borate 0.2%. The batching ratio of P material: molar ratio [Si] / [Ca]=1.0, [Si] / [Al]=2.6.

[0107] The above-mentioned ingredients are processed by in-situ grinding of incoming materials, and var...

Embodiment 2

[0116] Embodiment 2: ecological cement and preparation method, calculate with the weight ratio of original material:

[0117] (1) F material: fly ash 5%, steel slag 10%, water quenching slag 39%, shale (roasting) 7%, F material additives: sodium lignosulfonate: 0.5%, sodium polyphosphate: 0.1%, Polyvinyl acetate 0.4%. , The batching ratio of F material: molar ratio [Si] / [Ca]=0.5, [Si] / [Al]=3.0.

[0118] The shale in material F adopts pre-roasting process, the roasting temperature is 800-900°C, and the roasting time is 1-2 hours.

[0119] Grind the above ingredients separately and enter into the mixer for mixing, firstly grind and then mix.

[0120] (2) P material: slag 5%, lime 13%, phosphorus slag 13%, P material additives: sodium polyphosphate 0.1%, active Al(OH) 3 1%, active milk of lime 0.9%. Grind the above ingredients separately and enter into the mixer for mixing, firstly grind and then mix.

[0121] Ingredients ratio of P material: molar ratio [Si] / [Ca]=0.5, [Si] / ...

Embodiment 3

[0133] Embodiment 3, cement, calculate with the weight ratio of original material:

[0134] Material F: 25% red mud, 40% water-quenched slag, 6% fly ash

[0135] F material additives: calcium dihydrogen phosphate 3%, sodium aluminate 1%

[0136] P material: 3% slag, 18% phosphorus slag

[0137] P material additives: active lime milk 0.1%, sodium lignosulfonate 0.1%, calcium sucrose 0.4%, calcium chloride 1.4%

[0138]Particle size control of material F: 3% remaining on 200 mesh sieve, specific surface area is 4300cm 2 / g;

[0139] Particle size control of material P: 4% remaining on 200 mesh sieve, specific surface area is 4900cm 2 / g.;

[0140] Ingredients ratio of F material: molar ratio [Si] / [Ca]=1.7, [Si] / [Al]=1.5

[0141] Ingredients ratio of P material: molar ratio [Si] / [Ca]=0.3, [Si] / [Al]=4.0

[0142] Material D: 4% of directing agent, solid content of material D: 78%.

[0143] Material D is made of highly active Al(OH) 3 , strong alkali, water glass and alumin...

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Abstract

The new type of ecological cement and its preparation and application belongs to the field of cementing material technology. The materials includes aluminum-rich material F, aluminum-poor material P and guide crystal seed D, and material F and material P are selected from various industrial wastes and natural minerals. Material F has the molar ratio of Si / Ca in 0.5-1.7 and Si / Al in 1.5-3.0, and material P has the molar ratio of Si / Ca in 0.3-1.0 and Si / Al in 1.0-2.6. During use, material F, material P and material D are mixed while adding water to form cementing matter with high strength. The present invention changes industrial wastes into useful material, and has no secondary environmental pollution.

Description

(1) Technical field [0001] The invention relates to an ecological cement and its preparation method and application, belonging to the technical field of cementitious materials. (2) Background technology [0002] All substances that can change from slurry to solid stone-like body under physical and chemical action, and can cement other materials and have a certain mechanical strength, are collectively referred to as cementitious materials, and cementitious materials are divided into hydraulic and non-hydraulic. Two, ordinary portland cement and aluminate cement are hydraulic materials, which can not only harden in air but also harden in water after mixing with water. [0003] Since the birth of Portland cement at the end of the nineteenth century, cement has been used as a building cementing material for more than 100 years. So far, it is still the largest building structure material in the world. After a long history of development and many major changes, the production tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/00C04B7/14C04B7/36
CPCY02P40/10
Inventor 祝凤美张立省张超高方舟张馨方
Owner 张立省
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