Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High Belite sulphoaluminate cement prepared by coal gangue

A technology of special sulfur aluminate and coal gangue, which is applied in the field of cement, can solve the problems of waste of resources, pollution of the environment, and failure to formulate standards, and achieve the effects of protecting the environment, saving energy, and improving the strength of the later stage

Inactive Publication Date: 2010-07-28
BEIJING UNIV OF TECH
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this cement is still in its infancy, and specific standards have not yet been formulated.
The development and utilization of industrial waste residues in my country is still very unbalanced. A large amount of waste residues are shelved, polluting the environment, and causing a waste of resources. Therefore, there is a great potential for using waste residues to prepare high belite sulfoaluminate cement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Limestone, coal gangue, and phosphogypsum are dried in a dryer at a temperature of 100°C, and ground with a small mill for testing. The limestone and gypsum pass through a 0.08mm square hole sieve and the remaining 5% is sieved, and the coal gangue is finely ground. Until all pass through a 0.08mm square hole sieve. Then get limestone 64.5g, phosphogypsum 7.5g, coal gangue 28.1g, above-mentioned raw material is put into stirring type mixer, take out after mixing (wherein active ingredient is SiO in the raw material=21.53%, Al 2 o 3 =16.53%, Fe 2 o 3 =2.35%, CaO=51.98%).

[0018] Add water to the mixed raw meal, the water-cement ratio is 0.41, and stir evenly. Use the test mold to press under the pressure of 30KN to make several small test cakes of φ25mm×5mm, and then put the remaining mixed raw material in the mold and squeeze it into φ100mm×20mm corrugated round cakes under the pressure of 50KN. Then put the large and small cakes into a dryer at 100°C and dry them...

Embodiment 2

[0025] Limestone, coal gangue, and phosphogypsum are dried in a dryer at a temperature of 100°C, and ground with a small mill for testing. The limestone and gypsum pass through a 0.08mm square hole sieve and the remaining 5% is sieved, and the coal gangue is finely ground. Until all pass through a 0.08mm square hole sieve. Then get limestone 69.1g, phosphogypsum 4.9g, coal gangue 26.0g, above-mentioned raw meal is weighed by proportioning, and put into stirring type mixer in raw meal, take out after mixing (wherein active ingredient is in the raw material: SiO 2 =20.71%, Al 2 o 3 =15.78%, Fe 2 o 3 =2.27%, CaO=55.21%).

[0026] Add water to the mixed raw meal, the water-cement ratio is 0.41, and stir evenly. Use the test mold to press under the pressure of 30KN to make several small test cakes of φ25mm×5mm, and then put the remaining mixed raw material in the mold and squeeze it into φ100mm×20mm corrugated round cakes under the pressure of 50KN. Then put the large and sm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a high Belite sulphoaluminate cement prepared by industrial waste residue, the used raw meals, which are limestone, industrial waste residue coal gangue and ardealite, are added with retarder according to a conventional preparation method in case that the roasting temperature is controlled in the range of 1400+ / -20 DEG C, and the high Belite sulphoaluminate cement can be prepared under the operations in accordance with specific implementation steps. The main effective ingredients in the raw meals are: 20.71%-21.53% of SiO2, 15.78%-16.53% of Al2O3, 2.27%-2.35% of Fe2O3 and 51.98%-55.21% of CaO. The prepared high Belite sulphoaluminate cement is superior to 52.5R common Portland cement in the aspect of performance.

Description

technical field [0001] The invention belongs to the technical field of cement, and in particular relates to high belite sulfoaluminate cement prepared by utilizing industrial waste slag, coal gangue and phosphogypsum. Background technique [0002] In the research of preparing high belite aluminate cement by using fly ash abroad (translated by Cheng Shaohua, using fly ash to calcinate sulphoaluminate belite cement. Sichuan Cement. 1996, 4), the use of fly ash , limestone and gypsum as raw materials, a series of studies have been done. The results show that f-CaO in cement plays an important role in promoting the formation of ettringite; it can be used as high early strength cement; the early porosity is lower than that of Portland cement under the same conditions, and the porosity at 28 days is the same as that of the clinker; The phase composition design is easy, but the raw material components are different in different places, and the ratio of raw materials cannot be dete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B7/32
CPCC04B7/32C04B7/3453C04B2111/00215Y02P40/10C04B7/24
Inventor 兰明章陈智丰张振秋张海文王亚丽崔素萍王子明
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com