Wet Test Sieve -Dahan Machinery

introduce
Applications
Video
model

When to conduct wet sieving instead of dry sieving?

To judge whether the sample needs dry sieving method or wet sieving method, there are three judgment criteria as follows:

1. The dry sieving method cannot meet the requirements of sample separation

2. There is a small amount of granular agglomeration in the sample

3. It is necessary to remove the silt or clay attached to the sample

Applicable material characteristics of wet test sieve

Wet Test Sieve is used in the wet sieving procedure for sample analysis. It can be used to remove fine materials that are difficult to sieve before sample drying and testing. The processed materials need to have the following characteristics:

1. Insoluble in water

2. Does not expand and deform when exposed to water or humidity

3. The material is not sensitive to temperature changes and can maintain its shape at 110°C without changing

Material type	Example	Characteristics	Mesh number recommendation	Application scenario
Soil/geological samples	wet soil, mud	high water content, viscosity	10-200 mesh	soil particle size analysis
Mineral/ore slurry	coal slime, iron ore powder	wet, fine	50-200 mesh	mineral fineness detection
Organic fertilizer/compost	wet compost, manure	high humidity, viscosity	20-80 mesh	fertilizer particle screening
Chemical powder	wet rubber powder, pigment slurry	wet sticky, fine	80-200 mesh	powder particle size analysis
Food/agricultural products	fruit residue, wet flour	wet soft, sticky	30-120 mesh	food residue screening
Environmental samples	sludge, sediment	high water content, complex	50-150 mesh	environmental monitoring
Other wet and sticky materials	wet cement slurry, fly ash	viscous, low fluidity	40-120 mesh	industrial material classification

what is wet sieve test?

The wet sieve test is also a method for analyzing the particle size distribution of samples, and it is used to remove small sample materials that may be difficult to sieve. The wet sieve test can be performed according to the following tips:

A. Before starting the analysis, weigh the total sample. The sample should be dry at this time.

B. If time permits, soak the sample to make the test analysis easier.

C. Add deflocculants such as sodium hexametaphosphate or Calgon to the soaking solution to decompose the clumped samples and disperse the sample particles.

D. Use a nozzle or sprayer to evenly wet the sample during sieving or stirring.

E. Use gentle, controlled water pressure to prevent accidental sample loss and damage to the screen.

Video display

Features

1. Made of non-rusting material, it will not rust or corrode due to long-term use in a humid environment;

2. Meet the ISO6106 standard, and can promise to design the sieve according to the laboratory analysis standard;

3. The Wet Test Sieve of the same model is guaranteed to have consistent nesting;

4. The opening of the mesh surface is uniform and the opening rate is high;

5. The mesh hole is consistent, the mesh surface is smooth, the sample is not damaged and the sample can flow freely;

6. The edge of the screen frame is curled for safe operation.

What is a wet test sieve used for?

Wet Test Sieve is applied in wet sieving, and it is an ideal treatment method for fine powder samples that are easy to agglomerate and cause their own particle false changes to affect the accuracy of sieving. include:

Soil and mineral aggregates with high fines content

Fragile but insoluble materials such as coal or other minerals

light powder

Sludges and Glazes

Kaolin and fillers

Abrasives

microparticles

Product number

NO.	Name	Unit	Parameter
1	frame diameter	mm	φ200
2	the number of layer	s	1~8
3	sieve size	mm	0.025-3
4	vibrating amplitube	mm	1~4
5	vibration frequency	n/min	1440
6	power supply	V;HZ;KW	220;50;0.12
7	outside dimension	LWH	350350(300+n*56)
8	machine weight	kg	36
9	time alarm	s	999
10	noise	db	Less than 50

Display and introduction of product screen types

Wet Test Sieve screens are available in three forms: metal perforated plate screens, wire woven screens, and electroformed screens.

The punching plate screen has the largest opening, and the punching machine punches uniform and standard screen holes on the stainless steel metal plate. It is the most solid screen form and is suitable for the analysis of large particles, blocks, and abrasive samples, such as Rocks, abrasives, etc.

The wire woven screen has small openings and is suitable for the analysis of particles and powder samples. The pressure bearing capacity is weak, and strong impact screening should be avoided.

The electroforming screen is suitable for the precise sample analysis of the machine. The mesh is the most dense, but the screen is also the most fragile. It is only suitable for a small amount of sample analysis and is easy to break. Generally, the screen surface is supported by a grid.

Sieve mesh display, mesh data table

The screen mesh sizes shown here are for wire woven screens and electroformed screens only.

No.	Type	Mesh(mm)	No.	Type	Mesh(mm)
1	8#	2.360	15	70#	0.212
2	10#	2.000	16	80#	0.180
3	12#	1.700	17	100#	0.150
4	14#	1.400	18	120#	0.125
5	16#	1.180	19	140#	0.106
6	18#	1.000	20	170#	0.09
7	20#	0.850	21	200#	0.075
8	25#	0.710	22	230#	0.063
9	30#	0.600	23	270#	0.053
10	35#	0.500	24	325#	0.045
11	40#	0.425	25	400#	0.038
12	45#	0.355	26	500#	0.028
13	50#	0.300	27	>500#	<0.028
14	60#	0.250

How to perform a wet and dry sieve analysis?

Features	Wet screening	Dry screening
picture
Applicable materials	Materials with high moisture content, high viscosity or easy to agglomerate	Dry materials with good fluidity
Screening method	Screening in water or liquid medium	Screening directly in the air
Applicable particle size	5μm ~ 2mm (applicable to ultrafine powder)	40μm ~ 100mm (applicable to larger particles)
Whether to dry	Generally, the sample needs to be dried before weighing	No additional drying treatment is required
Screening accuracy	Higher, can prevent fine powder from agglomerating and improve classification accuracy	Low accuracy, prone to blockage and misscreening
Applicable industries	Chemical, pharmaceutical, food, ceramics, metallurgy, mineral processing	Construction, ore, sand and gravel, grain, plastic particles