How Bettersizer ST Accelerate QC and Research Process of Minerals and Pesticides.pdf

© 2023 Bettersize Instruments Ltd. Company Confidential
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How Bettersizer ST Accelerate QC and Research
Process of Minerals and Pesticides
Weichen Gan
Application Engineer
Bettersize Instruments Ltd.

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Content
I. Bettersizer ST Introduction
Ø An introduction of Bettersize Instruments Ltd
Ø What is Bettersizer ST?
II. Application Case 1: Optimizing Grinding of Marmatite
Ø Case introduction
Ø Bettersizer ST solutions
Ø Extra tips
III. Application Case 2: Quality Inspection of Calcium
Carbonate Products
Ø Extra tips
IV. Application Case 3: Quality Control of Pesticide Products
Ø Extra tips

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Bettersize Instruments at a Glance
Key figures
• Bettersize founded in 1995 by
Qingyun Dong, a scientist from
a state-run research institute;
• The company is China’s No.1
player in particle sizing
business;
• In the past 11 years, Bettersize
has invested in its oversea
business strongly, and won the
trust of more than 1,000 users
in the global market.
Headquarters
Dandong (China)
- From 1995
- 180+ employees
- 11000 m2 plants
- R&D center, Manufacturing
- China business center
Shenzhen subsidiary
Shenzhen (China)
- From 2019
- 28 employees
- R&D innovation
- Global business center
About us

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Bettersize Product Line Portfolio
Laser Particle Size Analyzer
BETTERSIZER
Particle Shape Analyzer
BEVISION
Nano Particle Size Analyzer
BENANO
Powder Characteristic Tester
POWDERPRO
Tapped Density Tester
BEDENSI
5 Product Lines
• Particle size distribution
• Compliance: 21 CFR Part 11,
ISO 13320, USP <429>, CE
- S3 Plus: 0.01-3500 µm / Size and
shape / BT-A60 autosampler
- 2600: 0.02-2600 µm / Wet & dry /
Modular design
- ST: 0.1-1000 µm / Cost effective /
Robust
• 24 particle size and shape
parameters
• Compliance: ISO 9276-6:2008
- D2: 30-10000 µm / Dynamic
imaging / Dry
- M1: 1-10000 µm / Static imaging /
Cleanliness analysis / Wet & dry
- S1: 1-3000 µm /Static imaging / Wet
& dry
• Nano particle size - DLS
• Zeta potential - ELS
• Molecular weight - SLS
• 90° DLS, 173°DLS, and PALS
• 7 models available
• 14 physical properties of
powders
• Automated and Manual models
• Compliance: ASTM D6393-14, ISO
3953:2011, EP7.0
07/2010:20934E, USP32-
NF27<616>
• Tapped density and bulk
density
• Up to 3 workstations
• Compliance: USP, EP, ASTM,
and ISO
• Self installation
Laser Diffraction Dynamic and Static Imaging
DLS, ELS, and SLS Carr Index Method

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What is Bettersizer ST?
The Bettersizer ST is a fully
automated and integrated particle
size analyzer with a smart
operation system by wet dispersing.
Optimized for the industrial QC
process, the Bettersizer ST
provides stable and reliable test
results with minimum user
intervention. The compact
footprint saves valuable
workspace for factories and
laboratories.
• Measurement range: 0.1 – 1000 μm;
• DLOS (Dual lens optical system) provides accurate test results of particle
size;
• Automatic measurement using User-friendly software with SOP
(Standard Operating Procedure) offers easy operation;
• Automatic alignment functionality leads to good reproducibility;
• Compact design saves workspace.
Forward Detectors
Lateral
Detectors
Backward
Detectors
Laser
Lens 1 Lens 2
Sample Cell
With its great accuracy and repeatability, the Bettersizer ST is a perfect
QC tool for various applications and industries.
A widely used Laser Diffraction Particle Size Analyzer
Benefits
ü Ease-of-use
ü Cost-efficiency
ü Robustness
ü Low maintenance
Bettersizer ST: your one-stop QC tool

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Case 1: Optimizing Grinding of Marmatite
Particle size matters in the process of turning marmatite into zinc
Raw mined
marmatite
Crushing and Grinding
Zinc concentrate
Zinc calcine
Solution Zinc
Acid leaching
Electrometallurgical
process
When to end grinding?
Dewatering
and roasting
Particle size distribution (PSD) affects dewatering efficient
PSD affects leaching efficient
A Bettersizer ST can help you monitoring the
PSD, thus controlling the producing quality
Concentrating

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Before Improvement: Low Throughput and High Cost
Optimizing grinding: It takes approximately 2 hours to finish grinding of a batch
of ores, but what is the appropriate time to end grinding?
Tolerance
Time in a day
Longer
grinding time
Keep screening until particle size reaches the tolerance – time consuming particle
size measurements, lower time-accuracy, and more susceptible to interferences

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Step 1: Tighter Tolerance with More Accurate Results
More efficient measurements by Bettersizer ST, provide high accuracy results
New
Tolerance
Time in
a day
Particle size measurements with Bettersizer ST (orange and
green dots) – higher efficiency and more accurate time to stop
Not passed
Passed
The Bettersizer ST help to make the particle size inspection more efficient, make the response time becomes shorter, thus for each batch of ores, the
grinding process can be stopped at an exact time.

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Step 2: Reduce Insurance Over Grinding
Advantages:
a. Energy expended in insurance over
grinding could be minimized.
b. tighter tolerances and thus more
consistent product.
c. A decreased response time thanks
to shorter measurement time.
Shorten the grinding time but still satisfy the quality requirement
With a more accurate grinding process control, no longer need to worry about grinding insufficient. The insurance over grinding should be reduced.
Tolerance from
Step 1
Optimized tolerance

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Extra Tips: Use Ultrasound to Eliminate Agglomerates
A built-in ultrasound disperser is to separate agglomerated particles apart
Volume
Frequency
%
Sample Name D06 (μm) D10 (μm) D16 (μm) D25 (μm) D50 (μm) D75 (μm) D84 (μm) D90 (μm) D97 (μm)
GM - No
Ultrasound
3.510 4.498 5.966 8.662 23.28 55.67 75.87 96.43 148.3
GM – Ultrasound
Dispersed #1
1.758 2.731 4.331 7.271 19.91 45.10 61.84 79.20 122.0
GM – Ultrasound
Dispersed #2
1.752 2.736 4.339 7.266 19.77 44.68 61.43 78.76 121.4
GM – Ultrasound
Dispersed #3
1.744 2.723 4.317 7.224 19.62 44.22 60.97 78.22 120.9
Particle Size (microns)
Sample dispersion
system of Bettersizer ST
Break
agglomerations
to single
particles

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Case 2: Quality Inspection of Calcium Carbonate Products
Particle size matters for both producing and application of ground calcium carbonate (GCC)
A Bettersizer ST can help you monitoring the
PSD, thus controlling the producing quality
White calcites
Grinding
and crushing
filler for concrete
ceramic tiles
blackboard chalk
iron ore purification
oil well drilling fluids
paints
adhesives
pesticides
acidity controller
PSD related with
performance

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Is There Any Difference Among GCC Samples?
A consistent size distribution of GCC products is a sign of stable product quality
Sample name D10 (μm) D50 (μm) D90 (μm)
GCC Sample A 2.290 16.14 35.61
GCC Sample B 2.289 16.07 36.54
GCC Sample C 2.095 15.78 34.79
Typical Values of 3 GCC sample PSD curves of 3 GCC sample
The Bettersizer ST help to make the particle size inspection of 3 samples from different batch of GCC products. They are produced in same process and
by the same producer but in different time.

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Extra Tip: Repeatability Implies Stability of Particle Sizing Method
Repeatability vs. reproducibility: how can I trust my particle size analyzer?
Record
number
D10 (μm) D50 (μm) D90 (μm)
Sample C-1 2.097 15.70 34.92
Sample C-2 2.097 15.70 34.87
Sample C-3 2.089 15.66 34.83
Sample C-4 2.106 15.95 34.75
Sample C-5 2.106 15.95 34.71
Sample C-6 2.095 15.87 34.68
Average 2.095 15.78 34.79
Repeatability
error
0.32% 0.85% 0.25%
To evaluate repeatability: a same operator, using the same instrument,
continuously testing the same sample
To evaluate reproducibility: different operator / instrument / time / place
Acceptable standard of evaluating repeatability
According to ISO 13322-2020, acceptable limit of repeatability error of 6 tests
D10: ≤ 2%
D50: ≤ 1.5%
D90: ≤ 3%
How to calculate?
According to ISO 13322-2020, repeatability error (standard deviation) is calculated
as follow:
�� = �=1
�
�� − � 2
� − 1

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Application Case 3: Quality Control of Pesticide Products
Development - production - storage - use, particle size is a key factor of every aspect pesticide industry
Take suspension concentrate (SC) pesticide as an example:
R&D
PSD of pesticides
affects the residual
effect period and
biological activity
Production
Storage
Use
PSD of
pesticides
affects stability
of products
Evaluation of formula
Grinding
time vs effect
When to end grinding?
Is it still ok to use?
Inspect PSD
to control
quality
Is it ready to use?
A Bettersizer ST can help you inspect the PSD,
in the whole life cycle of pesticide products

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R&D: Which is the Best Formula?
PSD of suspension concentrate (SC) products is vital for the residual effect period and biological activity of it
Sample name D10 (μm) D50 (μm) D90 (μm) Span
Formula 1 0.810 2.766 5.921 1.85
Formula 2 0.353 0.887 3.106 3.10
Formula 3 0.672 1.739 4.730 2.33
Formula X 0.672 1,739 3.106 1.40
Typical Values of SC formulas
D90 over 5 μm, which indicates this formula is susceptible to
sedimentation - low stability - negative for shelf life
Finest particle size among three formulas, but attention the
largest span - not a concentrated distribution
Finest particle size among three formulas, and smallest span

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Production: When to Stop Grinding?
Stop grinding when the process is “saturated” to help save expenditure of time and money
Milling time vs particle size
Saturated - PSD
no longer reducing
Not saturated - PSD reducing
with extended milling time

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Extra Tip: How to be More Confident about PSD Results?
Using a image particle size analyzer can help achieve “to see is to believe”
Large particles and
agglomerates

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For more information, please visit
Booth B34, Hall 2
Or scan the QR code

How Bettersizer ST Accelerate QC and Research Process of Minerals and Pesticides.pdf

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