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A kind of activity detection method of reduced aluminum powder

A technology of activity detection and aluminum powder, applied in the field of activity detection of reduced aluminum powder, can solve problems such as large differences in specific surface area, difficult availability of raw materials and reagents, one-sided inspection indicators, etc., to reduce production costs, optimize supply channels, and detect methods. simple effect

Active Publication Date: 2018-11-27
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main function of using reduced aluminum powder in the above process is to reduce tetravalent titanium to trivalent titanium. The main production processes are: melt extrusion method, dry mixing method, bonding fixation method and jet crushing method. Due to different manufacturers, The particle size, particle size distribution, shape, specific surface area and other indicators of aluminum powder produced by different processes are very different. Titanium dioxide manufacturers can only use simple indicators such as product fineness and elemental aluminum content when purchasing reduced aluminum powder. Testing is carried out to evaluate the reduction activity of aluminum powder, but because the inspection index is too one-sided, it is often impossible to achieve the same reduction efficiency (i.e. activity) even if the two aluminum powders with the same fineness are tested in actual use, so the inspection The limitation of the method has greatly affected the scientific and reasonable choice of titanium dioxide manufacturers in the process of purchasing and using aluminum powder.
[0006] There are also some manufacturers’ laboratories for the preparation of trivalent titanium, using concentrated sulfuric acid to dissolve metatitanic acid to obtain titanyl sulfate solution, and then using different aluminum powders to directly evaluate the reduction efficiency. This method is simple, fast and effective, but it is limited by the raw material reagents. It is not easy to obtain, so it is difficult to extend to aluminum powder manufacturers for the detection of reduction efficiency, which has certain limitations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take by weighing 340g analysis pure titanium tetrachloride (TiO 2 Add up to 100g), add fresh water and dilute to about 1000ml, obtain titanyl sulfate to be reduced and simulate liquid to detect each index as follows:

[0029] TiO 2 =100g / l, F value=2.0 (effective acid is calculated by sulfuric acid)

[0030] Put 1000ml of the prepared solution at a constant temperature of 50°C and fully stir, slowly add 11.25g of reduced aluminum powder to be detected (100% of the theoretical demand), react for 60min, and detect the clear liquid index: TiO 2 =100g / l, Ti 3+ =90g / l;

[0031] The activity of reduced aluminum powder=(concentration of trivalent titanium / 80 / 3)*27 / the total amount of aluminum powder added=(90 / 80 / 3)*27 / 11.25=90.0%.

Embodiment 2

[0033] Take by weighing 340g analysis pure titanium tetrachloride (TiO 2 100g in total), add concentrated hydrochloric acid, and fresh water is diluted to about 1000ml, obtains titanium oxysulfate and waits to reduce the simulation liquid and detects each index as follows: TiO 2 =100g / l, F value=5.0 (effective acid is calculated by sulfuric acid);

[0034] Put 1000ml of the prepared solution at a constant temperature of 50°C and fully stir, slowly add 9.00g of reduced aluminum powder to be tested (80% of the theoretical requirement, the quality is the same as Example 1), react for 60min, and detect the clear liquid index: TiO 2 =100g / l, Ti 3+ =72g / l;

[0035] Activity of reduced aluminum powder=(concentration of trivalent titanium / 80 / 3)*27 / total amount of aluminum powder added=(72 / 80 / 3)*27 / 9.00=90.0%.

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Abstract

The invention discloses an activity detection method of reductive aluminum powder. The activity detection method comprises following steps: 1, titanium tetrachloride is weighed, and is diluted with water so as to obtain a titanium tetrachloride aqueous solution with a certain concentration; 2, a strong acid is weighed, and is added into the titanium tetrachloride aqueous solution, and F value of an obtained solution is adjusted so as to obtain a titanyl sulfate simulated solution; 3, the titanyl sulfate simulated solution obtained in step 2 is heated, reductive aluminum powder is weighed and is added for full reaction, trivalent titanium in an obtained reaction solution is detected, and the activity of reductive aluminum powder is calculated. The activity detection method is used for detecting activity of aluminum powder, revivification effect of aluminum powder is evaluated scientifically and reasonably, the activity detection method is simple, effect is excellent, important significance on optimization of supply channels of aluminum powder for titanium dioxide manufacturers and reducing of production cost is achieved; and in addition, a standardized chemical method is adopted for detection, and it is beneficial for popularization in the field of titanium dioxide.

Description

technical field [0001] The invention relates to an activity detection method of reduced aluminum powder, which belongs to the field of chemical substance detection. Background technique [0002] Titanium dioxide is an important inorganic chemical raw material. It is non-toxic and harmless to health. It is the most important white pigment, accounting for 80% of all white pigments used. It is widely used in coatings, plastics, papermaking, printing inks, chemical fibers, and rubber. , cosmetics, food and other industries. At present, the total production of titanium dioxide in my country has reached 1.8 million tons. The production process of titanium dioxide mainly includes sulfuric acid method and chlorination method. The production process in my country is mainly sulfuric acid method. [0003] In the production process of sulfuric acid titanium dioxide, the constant amount of iron impurities in the metatitanic acid after washing is gradually oxidized with the prolongation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 代堂军姚恒平朱全芳孙润发彭方沙程骞侯丹陈波
Owner SICHUAN LOMON TITANIUM IND CO LTD