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Method for determining mixing uniformity of powdery product of dry-process mixing

A mixing uniformity and measuring method technology, applied in the field of mixing uniformity measurement, can solve the problems of cumbersome detection steps, long measurement time and high detection cost, and achieve the effects of fast detection speed, high accuracy and low detection cost

Active Publication Date: 2018-05-25
INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has many shortcomings such as cumbersome detection steps, long measurement time, large error, and high detection cost.
For example, the detection of vitamin or DHA content usually needs to be completed by liquid chromatography or gas chromatography. The determination of a single sample takes a long time, and the uniformity of mixing usually takes 3 to 4 days or even longer

Method used

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  • Method for determining mixing uniformity of powdery product of dry-process mixing
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  • Method for determining mixing uniformity of powdery product of dry-process mixing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] It is 80wt% to measure skimmed milk powder content, and the mixing uniformity of the milk powder after adopting the dry method mixing that lactose content is 20wt%, steps are as follows:

[0035]Take skimmed milk powder and lactose respectively, and adopt PFT powder fluidity measuring instrument (U.S. Brookfield Bo Le Fei Company) to measure the fluidity of both respectively, according to the fluidity function curve that draws, determine the component with little fluidity, The analysis of the fluidity function curve shows that the fluidity of lactose is less than that of skim milk powder, so lactose is used as a tracer;

[0036] 2) Determination of lactose D by Malvern laser diffraction particle size analyzer MS3000 V 10. The particle size values ​​corresponding to Dv50 and Dv90 are determined to be 6 μm, 49 μm and 147 μm respectively, and the effective particle size range is determined to be 6 μm to 147 μm;

[0037] 3) Use the above-mentioned laser diffraction particl...

Embodiment 2

[0049] It is 50wt% to measure the whole milk powder content, the skimmed milk powder content is 30wt%, and the lactose content is the mixing uniformity of the milk powder after adopting the dry mixing of 20wt%, and the steps are as follows:

[0050] 1) Take whole milk powder, skimmed milk powder and lactose respectively, and adopt PFT powder fluidity tester (U.S. Brookfield Brookfield company) to measure the fluidity of the three respectively as in the method in embodiment 1, according to the obtained Mobility function curve, to determine the component with the least fluidity. After analyzing the fluidity function curve, it can be known that lactose has the least fluidity, so lactose is used as a tracer;

[0051] 2) Determination of lactose D by Malvern laser diffraction particle size analyzer MS3000 V 10. The particle size values ​​corresponding to Dv50 and Dv90 are determined to be 6 μm, 49 μm and 147 μm respectively, and the effective particle size range is determined to be...

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Abstract

The invention discloses a method for determining the mixing uniformity of a powdery product of dry-process mixing. The method comprises the following steps: 1) determining a raw material with the poorest fluidity as a tracer; 2) determining the corresponding particle size values of the tracer under different volume distribution, measuring the range of a difference between a maximum particle size value and a minimum particle size value, and recording the range as D; 3) determining the volume fractions of other raw materials with particle size values within D; 4) mixing all the raw materials byusing a dry process, and respectively marking the mass fractions of all the raw materials except the tracer in the obtained mixture as Wj; 5) respectively weighing materials at different sites of themixture as samples, and determining the volume fractions of materials with particle size values within D in the weighed different samples; 6) respectively calculating the mass fractions wi of the tracer with a particle size value of D in the different samples and calculating the coefficient of variation (CV); and 7) calculating the mixing uniformity M of the mixture. The method is simple, rapid and highly accurate.

Description

technical field [0001] The invention relates to the determination of the mixing uniformity of powdery products. More specifically, it relates to a method for measuring the mixing uniformity of dry mixed powder products. Background technique [0002] In the production process of formula milk powder, some raw materials, vitamins, minerals, DHA and AA (eicosatetraenoic acid), etc. are often mixed by dry blending process, or simply dry blended process is used to produce formula milk powder. Therefore, the dry blending process plays an important role in the production of formula milk powder. Since there are differences in the particle size and characteristics of each raw material, it is of great significance to evaluate the mixing uniformity of the mixed sample obtained by the dry mixing process. However, how to evaluate the mixing uniformity of mixed samples more quickly, easily, accurately and at low cost has received more and more attention. [0003] Theoretically, a substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/04G01N1/38
CPCG01N1/38G01N33/04
Inventor 畅鹏飞孔小宇苏曼刘宾
Owner INNER MONGOLIA YILI INDUSTRIAL GROUP CO LTD
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