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

Method for measuring content of calcium oxide in iron ores

A calcium oxide and iron ore technology, applied in the field of detection, can solve the problems of cumbersome operation, strict requirements, and long time consumption, and achieve the effect of low cost, high accuracy and compactness, and accurate results

Inactive Publication Date: 2012-08-15
YUNNAN PHOSPHATE CHEM GROUP CORP
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These solvents have a greater impact on the environment and analytical operators
The operation is cumbersome and demanding, and takes a long time

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 content of calcium oxide in iron ores
  • Method for measuring content of calcium oxide in iron ores
  • Method for measuring content of calcium oxide in iron ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First prepare the main reagents:

[0018] ① 0.02mol / L disodium ethylenediaminetetraacetic acid (EDTA) standard solution: Weigh 8g of AR grade disodium ethylenediaminetetraacetic acid and dissolve it in water, dilute to 1000mL with water, and mix well. Calibration shall be carried out according to GB / T601. ②Potassium hydroxide solution: 200g / L; dextrin solution (prepared for current use): 20g / L; phenylglycolic acid solution: 50g / L; triethanolamine solution: 1+1; ③Calcein-methyl thymol blue Indicator: Weigh 0.2g of AR grade calcein, weigh 0.2g of AR grade methyl thymol blue, weigh 20g of AR grade potassium nitrate and place in a mortar, grind and mix well .

[0019] Next is to test:

[0020] Weigh about 0.4g sample, weighed to an accuracy of 0.0001g, and place it in a nickel crucible. Add 4 g potassium hydroxide solvent and mix well. Put the nickel crucible in a high-temperature furnace from a low temperature to 700°C and keep it warm for 20 minutes, then take out th...

Embodiment 2

[0027] On the basis of the experimental method of embodiment 1,

[0028] Weigh about 0.5g sample, weighed to an accuracy of 0.0001g, and place it in a nickel crucible. Add 5 g of sodium hydroxide solvent and mix well. Put the nickel crucible in a high-temperature furnace from a low temperature to 750°C and keep it warm for 15 minutes, then take out the crucible and cool it down. Put it in a 250mL beaker, add 75mL of boiling water, and immediately cover the watch glass. After the molten material falls off, wash the crucible and cover with hot water and a small amount of nitric acid. Under constant stirring, immediately add 25mL nitric acid to acidify, heat and boil until clear. Cool the solution, transfer it into a 250mL volumetric flask, dilute with water to the mark, and shake well for later use. Draw 25mL of the test solution in the volumetric flask and place it in a 300mL beaker, add 10mL of dextrin, stir for a while, add 10mL of phenylglycolic acid, stir well, add 15mL ...

Embodiment 3

[0036] On the basis of the experimental method of embodiment 1,

[0037]Weigh about 0.6g sample, weighed to an accuracy of 0.0001g, and place it in a nickel crucible. Add 6 g of sodium hydroxide solvent and mix well. Put the nickel crucible in a high-temperature furnace from a low temperature to 800°C and keep it warm for 10 minutes, then take out the crucible and cool it down. Put it in a 250mL beaker, add 80mL of boiling water, and immediately cover the watch glass. After the melt falls off, wash the crucible and cover with hot water and a small amount of nitric acid. Under constant stirring, immediately add 30mL nitric acid for acidification, heat and boil until clear. Cool the solution, transfer it into a 250mL volumetric flask, dilute with water to the mark, and shake well for later use. Draw 30mL of the test solution in the volumetric flask and place it in a 300mL beaker, add 12mL of dextrin, stir for a while, add 15mL of phenylglycolic acid, stir well, add 20mL of tr...

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
recovery rateaaaaaaaaaa
Login to View More

Abstract

The invention relates to a detecting method, particularly relates to a method for measuring the content of calcium oxide in sedimentary iron rock ores, and discloses a method for measuring the content of calcium oxide in iron ores. The method includes that potassium hydroxide is used as fluxing agent and used for melting iron ore samples in a high-temperature furnace, and after the iron ore samples are acidized by nitric acid, calcium ions enter solution; benzilic acid and triethanolamine are added in the solution to shield metal ions of titanium, iron, aluminum, small quantities of manganese and the like; extrin is used as a protecting agent so as to suppress interferences of phosphate radical and magnesium, and potassium hydroxide is added in alkali solution with pH (potential of hydrogen) larger than 12 to generate magnesium hydroxide precipitations; and calcein-methylthymol blue is used as an indicator, and ethylene diamine tetraacetic acid (EDTA) standard solution is used for titration, so that the content of the calcium oxide can be determined. The method has the advantages of simplicity, speediness, low cost, fine reproducibility and the like.

Description

technical field [0001] The invention relates to a detection method, in particular to a method for measuring calcium oxide content in sedimentary iron block ore. Background technique [0002] At present, the calcium oxide content in iron ore is determined by the potassium permanganate volumetric method, and the decomposed samples are mostly decomposed with hydrochloric acid and nitric acid. After filtration, the residue was desiliconized with hydrofluoric acid, and potassium pyrosulfate was melted. Precipitate iron, aluminum and titanium as hydroxides with ammonia water. Manganese is oxidized by ammonium persulfate to hydrated manganese dioxide and hydroxide and filtered out simultaneously, and phosphorus is separated in the form of iron phosphate at the same time. Then, make the calcium precipitate as calcium oxalate, then filter and wash, dissolve sulfuric acid, and titrate with potassium permanganate standard solution to determine the amount of calcium. These solvents h...

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): G01N21/79
Inventor 冯晓军薛菁陈丹红周玲芬卢美莲李翠华胡莲珍陈晶亮姜威梅连平
Owner YUNNAN PHOSPHATE CHEM GROUP CORP
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