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Reduced iron powder activity detection method

A technology for reducing iron powder and activity detection, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of agreement and detection, non-uniform inspection methods, etc., and achieve the effect of simple method, reducing production cost and optimizing supply channels

Active Publication Date: 2017-03-22
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the titanium solution to be reduced is a semi-finished product in the production process of titanium dioxide, and there is no iron powder manufacturer, and the supply and demand parties cannot agree and detect this indicator in a unified inspection method in the contract agreement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 340g analysis pure titanium tetrachloride (TiO 2 100g in total), add fresh water to dilute to about 850ml, add 29g of analytical pure ferric chloride, add 215g of analytical pure ferrous chloride, stir fully, after all the salts are completely dissolved, add fresh water to dilute to 1000ml, and obtain acid hydrolysis The indicators of the reduction simulation liquid are as follows: TiO 2 =150g / l, ∑Fe / TiO 2 =0.70, Fe 3 + =10g / l, F value=2.40 (effective acid is calculated by sulfuric acid);

[0028] Put 1000ml of the prepared solution at a constant temperature of 50°C and fully stir, slowly add 6.0g of reduced iron powder to be detected, react for 90min, and detect the indicators of the clear liquid:

[0029] TiO 2 =150g / l, Fe 3+ = 0g / l, Ti 3+ = 1.5g / l;

[0030] The activity of reduced iron powder=(concentration of trivalent titanium / 80 / 2+concentration of ferric iron / 56 / 2)*56 / the total amount of iron powder added=(1.5 / 80 / 2+10 / 56 / 2) *56 / 6.0=92.1%....

Embodiment 2

[0032] Weigh 1000ml of raw materials to be reduced by acid hydrolysis, keep the temperature at 50°C, and under the condition of sufficient stirring, slowly add 6.0g of reduced iron powder to be detected (same as Example 1), react for 90min, and detect the indicators of the clear liquid:

[0033] Acid hydrolysis raw material: TiO 2 =145g / l, ∑Fe / TiO 2 =0.70, Fe 3+ =10g / l, F value=2.30 (effective acid is calculated by sulfuric acid);

[0034] Serum indicator: TiO 2 =150g / l, Fe 3+ = 0g / l, Ti 3+ = 1.5g / l;

[0035] The activity of reduced iron powder=(concentration of trivalent titanium / 80 / 2+concentration of ferric iron / 56 / 2)*56 / the total amount of iron powder added=(1.5 / 80 / 2+10 / 56 / 2) *56 / 6.0=92.1%.

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Abstract

The invention discloses a reduced iron powder activity detection method. The method includes the following steps that firstly, titanium tetrachloride is weighed, water is added for dilution, and a titanium tetrachloride aqueous solution with a certain concentration is obtained; secondly, divalent ferric salt and trivalent ferric salt are added into the titanium tetrachloride aqueous solution, and the total iron-titanium ratio and the trivalent iron concentration are controlled; thirdly, the prepared solution containing titanium and iron is fully stirred and mixed to obtain a simulation solution for acidolysis of a to-be-reduced solution is obtained; fourthly, the obtained simulation solution is heated, weighed iron powder is added, trivalent titanium appearing in the solution is detected after a reaction is sufficient, and activity of the reduced iron powder is calculated. The method is used for detecting the activity of the iron powder, the reduction effect of the iron powder is scientifically and reasonably evaluated, the method is simple, the effect is remarkable, and the method plays an important role in optimizing iron powder supply channels by titanium dioxide manufacturers and reducing production cost. Meanwhile, detection is conducted by means of a chemical method capable of being standardized, and the method can be popularized in the titanium dioxide field easily.

Description

technical field [0001] The invention relates to a method for detecting the activity of reduced iron powder in the production process of titanium dioxide. [0002] Background of the invention [0003] 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. [0004] 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. "Purification" is an important part of the process, which must be strictly controlled in order to produce the best quality titanium dioxide products and meet the optimal performan...

Claims

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Application Information

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