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

Method for measuring high-temperature stability of hexavalent chromium reducing agent for cement

A technology of high temperature stability and determination method, used in color/spectral property measurement, measurement device, material analysis by optical means, etc., can solve problems such as cost increase, reduce pollution, improve safety and reliability, and simple operation Effect

Inactive Publication Date: 2020-03-20
DONGYUAN HONGCHAO TECH
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive use, resulting in an increase in cost

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
  • Method for measuring high-temperature stability of hexavalent chromium reducing agent for cement
  • Method for measuring high-temperature stability of hexavalent chromium reducing agent for cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] 1) Experimental raw material: P O42.5R milled cement (provided by a cement factory in Panzhihua, Sichuan)

[0067] 2) High temperature setting temperature: 105°C, 120°C

[0068] 3) High temperature duration: 10h

[0069] 4) Hexavalent chromium reducing agent

[0070] A) Hexavalent chromium reducing agent 1: Commercially available ferrous hexavalent chromium reducing agent, the amount of reducing agent used for reducing the hexavalent chromium content by 10mg / kg is 1000g.

[0071] B) Hexavalent chromium reducing agent 2: KPY commercially available from Guangdong Hongchao Technology Co., Ltd. ® -Cr-FⅢ type hexavalent chromium reducing agent, the amount of reducing agent used to reduce the hexavalent chromium content by 10mg / kg is 1200g.

[0072] 5) Detection steps:

[0073] A) Treatment of cement samples with and without reducing agent at room temperature:

[0074] A.1 Take two 0.9mm sieved P·O42.5R blank cement samples and P·O42.5R cement samples mixed with reducing...

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

No PUM Login to View More

Abstract

The invention discloses a method for measuring high-temperature stability of a hexavalent chromium reducing agent for cement. The method comprises the following steps: S1, measuring the content W1 ofhexavalent chromium in a cement sample which is not doped with the hexavalent chromium reducing agent at room temperature; S2, determining the content W2 of hexavalent chromium in the cement sample doped with the reducing agent at room temperature; S3, determining the content W3 of hexavalent chromium in the cement sample which is dried at high temperature and is not doped with the hexavalent chromium reducing agent; S4, determining the content W4 of hexavalent chromium in the cement sample doped with the hexavalent chromium reducing agent after high-temperature drying; and calculating to obtain the high-temperature stability of hexavalent chromium through a set formula. The method disclosed by the invention is simple to operate, and is beneficial to operators to select the hexavalent chromium reducing agent with good performance, so that the content of hexavalent chromium in cement is reduced, pollution is reduced, and the safety and reliability of operation are improved.

Description

technical field [0001] The invention relates to a method for detecting cement additives, in particular to a method for measuring the high-temperature stability of a hexavalent chromium reducing agent for cement. Background technique [0002] It is estimated that workers in 80 different industries may be exposed to hexavalent chromium. A variety of hexavalent chromium compounds are used in industries such as cement, leather, textile production, printing and dyeing, pigments, and chrome plating. Hexavalent chromium has high water solubility and strong permeability, and is easy to penetrate into human tissues, causing dermatitis, ulceration and other diseases. After long-term rain or immersion in concrete, hexavalent chromium is dissolved and brought into the reservoir or underground to cause chromium pollution in drinking water sources. [0003] The cement industry is a "three high" industry with high pollution, high energy consumption, and high consumption. Among them, hexa...

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): G01N21/31
CPCG01N21/3103
Inventor 蔡洪
Owner DONGYUAN HONGCHAO 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