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

Chromium-reducing cement and preparation method thereof

A technology for cement and cement clinker, applied in the field of cement, can solve the problems of strict temperature requirements and affect the effect of reducing chromium, and achieve the effects of strong oxidation resistance, avoiding the phenomenon of pump blockage, and good effect of reducing chromium

Active Publication Date: 2020-09-08
ANHUI CONCH GRP +3
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a kind of reduced chromium type cement and preparation method thereof, to solve ferrous sulfate and reduced chromium type cement in the prior art, due to being exposed in the air, ferrous sulfate and reduced chromium type cement all will gradually It is oxidized, which affects the effect of chromium reduction, and there is a technical problem of strict requirements on the use temperature

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Chromium-reducing cement and preparation method thereof
  • Chromium-reducing cement and preparation method thereof
  • Chromium-reducing cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of reduced chromium cement:

[0063] 1.1 Raw materials:

[0064] 85 parts of cement clinker, 10 parts of cement mixture, 5 parts of gypsum;

[0065] The grinding aid is a single-type chromium-reduced cement grinding aid, and its addition amount is 0.05% of the total weight of the main material;

[0066] Grinding aid raw material consumption is shown in table 1 below:

[0067] Table 1 Embodiment 1 grinding aid raw material list:

[0068]

[0069] 1.2 Preparation method, comprising the following steps:

[0070] (1) preparation of grinding aids

[0071] ①At room temperature, add water into the reaction vessel, add inorganic salt or chromium-reducing additive and stir evenly while stirring; after adding inorganic salt or chromium-reducing additive, stir at a speed of 65r / min for 15min;

[0072] ②Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 65r / min for 4min.

[0073] ③Stop stirring, add organic acid and...

Embodiment 2

[0078] Preparation of reduced chromium cement:

[0079] 2.1 Raw materials:

[0080] 60 parts of cement clinker, 35 parts of cement mixture, 5 parts of gypsum;

[0081] The grinding aid is a single-type chromium-reduced cement grinding aid, and its addition amount is 0.2% of the total weight of the main material;

[0082] Grinding aid raw material consumption is shown in table 2 below:

[0083] Table 2 embodiment 2 grinding aid raw material list:

[0084]

[0085] 2.2 Preparation method, comprising the following steps:

[0086] (1) preparation of grinding aids

[0087] ①At room temperature, add water to the reaction vessel, add inorganic salt or chromium-reducing additive and stir evenly while stirring; after adding inorganic salt or chromium-reducing additive, stir for 5 minutes at a speed of 70r / min;

[0088] ②Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 70r / min for 3 minutes.

[0089] ③Stop stirring, add organic ac...

Embodiment 3

[0094] Preparation of reduced chromium cement:

[0095] 3.1 Raw materials:

[0096] 64.5 parts of cement clinker, 30 parts of cement mixture, and 5 parts of gypsum;

[0097] The grinding aid is a single-type chromium-reduced cement grinding aid, and its addition amount is 0.1% of the total weight of the main material;

[0098] Grinding aid raw material consumption is shown in table 3 below:

[0099] Table 3 embodiment 3 grinding aid raw material list:

[0100]

[0101] 3.2 Preparation method, comprising the following steps:

[0102] (1) preparation of grinding aids

[0103] ①At room temperature, add water into the reaction vessel, add inorganic salt or chromium-reducing additive and stir evenly while stirring; after adding inorganic salt or chromium-reducing additive, stir at a speed of 60r / min for 20min;

[0104] ②Stop stirring, add alcohol amine and stir evenly; after adding alcohol amine, stir at a speed of 60r / min for 5min.

[0105] ③Stop stirring, add organic aci...

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides chromium-reducing cement and a preparation method thereof, and solves the technical problems that in the prior art, ferrous sulfate and chromium-reducing cement are exposed in air, so that the chromium-reducing effect is influenced and the requirement on the use temperature is strict as the ferrous sulfate and the chromium-reducing cement are both gradually oxidized. The chromium-reducing cement comprises the following steps: by weight, 10-20 parts of alkylol amine, 5-15 parts of an inorganic salt, 2-20 parts of an organic acid and 45-83 parts of water. Due to the addition of a chromium-reducing grinding aid, the chromium-reducing grinding aid not only has the grinding aid effect of the grinding aid, but also has strong oxidation resistance, is suitable for long-termstorage, and can prevent the chromium-reducing effect from being influenced by oxidation during storage. A finished product is a uniform solution, so that pump blockage caused by precipitation accumulation can be avoided, the high-temperature-resistant performance is excellent, and the cement working condition temperature change can be well adapted. The production process is simple, operation andquality control are easy, and obvious technical advantages and wide market prospects are achieved.

Description

technical field [0001] The invention relates to a cement, in particular to a chromium-reduced cement and a preparation method thereof. Background technique [0002] Cement is the basic material for national economic construction, and is widely used in industrial construction and civil construction. The water-soluble hexavalent chromium in cement is mainly brought in by limestone, iron tailings, silica-alumina materials, mixed materials and refractory materials in raw materials. Because hexavalent chromium has strong oxidizing and corrosive properties, long-term exposure will cause "skin eczema", and a large amount of intake may even lead to adverse consequences such as cancer and mutation. In the environment of long-term rainwater flushing, it will also cause groundwater quality and soil chromium pollution, resulting in the hidden danger of chromium poisoning. [0003] In order to control the content of water-soluble hexavalent chromium in cement and reduce the harm to huma...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/00C04B7/52C04B24/16C04B103/52
CPCC04B7/00C04B7/52C04B40/0039C04B2103/52C04B24/122C04B22/147C04B24/16C04B22/124C04B22/14
Inventor 熊玉兰韩礼张冲吴小波周文陈曦宋利丽
Owner ANHUI CONCH GRP
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