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Filson Interstage Screen

  • Vertical design to provide a small footprint
  • Large passing area to achieve high filtration efficiency
  • Difficult to plug since its wedge wire structure
  • High-quality raw materials with the advanced welding process
  • No moving parts without frequently replacing problem
  • Successfully avoid the adhesion of activated carbon
  • High roundness and coaxial for operating smoothly

Filson interstage screen has a symmetrical&seamless design to increase more than 18% open areas while ensuring a long service life. It can exhibit superior performance to greatly reduce the labor intensity of workers, save the production cost and stabilize the process flow.


  • Cylinder diameters: 500 – 1900 mm
  • Cylinder lengths: up to 4000 mm
  • Slot size: 0.315 – 1.25 mm
  • Flow rate: up to 350m3/hr
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Filson interstage screen

Your Incomparable Interstage Screen Manufacturer In China

Filson interstage screen is a type of wedge wire screen, playing a significant role in the process of carbon leaching. Filson generally manufactures a wide range of wedge wire interstage screens for CIP and CIL tanks.

With various slot sizes, cylinder diameters, and lengths, Filson interstage screen is an ideal choice in carbon slurry extraction. All standard specifications are available, and we also offer customized dimensions according to the carbon or resin size range of your leaching process.

Filson interstage screen is commonly made of SS 304 material to provide excellent corrosion resistance and withstand flow rate up to 350 m3/hr. With our advanced measurement and control instrumentation, Filson can provide you the best interstage screen with close tolerances on apertures.

Choose filson! Our professional engineers are always here to help you select the most suitable interstage screen!

Interstage Screen: The Ultimate FAQ Guide

I know choosing a suitable Interstage screen can be an overwhelming task.

A reason this guide will explore everything you need to know about Interstage screens such as features, material type, working principle to specifications, amongst others.

Let’s dive right in.

What Is Interstage Screen?

The interstage screen is a wedge wire screen that plays a vital role during the leashing of carbon.

This occurs during the extraction of gold ore from the activated carbon.

The interstage screen comes in different sizes, lengths, and also thicknesses.

Besides, this is depending on the quantity of carbon leashing you wish to achieve.

 Interstage screen

Interstage screen

What Are The Common Characteristics Of Interstage Screen?

It’s important to consider different features of the interstage screen before choosing one.

Our interstage screen has the following unique features which make it stand out in the market today.

Some of these features include;

  • The interstage screen is easy to connect.

It’s so easy to attach the interstage screen to the brackets without the bolts necessarily loosening.

  • It’s easy to maintain the Interstage screen.

With an interstage screen, you can easily maintain it. More so, it’s very easy to replace it in case it’s dysfunctional.

  • High durability of the Interstage screen.

The interstage screen is made of stainless steel which is highly resistant to corrosion and abrasion.

This feature prolongs the life span of the interstage screen.

  • High efficiency.

The Interstage screen is more efficient as it has a high capability of isolating carbon and minimizing anti-blocking.

  • A stable operation can easily rotate the interstage screen without encountering any damages or noises.

What Are The Benefits Of Interstage Screen?

The following are the most common benefits of the interstage screen.

They include;

  • The interstage screen has an anti-blocking feature that allows the retention of carbon during the extraction of the gold ore.
  • The interstage screen requires minimal maintenance which means less maintenance cost to the clients.
  • You can easily replace the interstage screen any time it’s dysfunctional.
  • The interstage screen has a high open area which results in increased throughput of the pulp flow.
  • The interstage screen is more durable which means it will serve you for a long time maximizing buying costs.
  • Lastly, the interstage screen has high resistance to blinding.

How Does Interstage Screen Work?

Parts of interstage screens

Interstage screen

Mineral processing separating pumping and mineral processing separating is a type of top submerging exit screen that aids in carbon leashing.

Normally, the interchange screen will be submerged under the pulp solution at the operating levels.

The pulp solution flows through the interstage screen while retaining the carbon on the outside.

After separation, the pulp flows inside the Interstage screen.

Then through the launder interface on the volute interface and the wedge wire screen.

Both mineral processing separating pumping and mineral processing separating works differently.

Ideally, mineral processing separating pumping installation occurs in circuits.

This is where by the pulp levels and tanks are all at the same horizontal levels.

Mineral processing separating pumping operates at a lower pulp pressure than that of the pulp at the exit launder.

During this operation, there is always a pressure drop.

It should be minimized by an up-pumping impeller that is incorporated in the interstage screen.

The up-pumping action increases the pulp velocity and head for transporting the pulp to the next adsorption tank.

The advantage of mineral processing separating pumping is that;

It works on a horizontal level rather than a conventional cascading operation.

Mineral processing separating is utilized in circuits where the tank’s arrangement is in a differential arrangement or a cascading arrangement.

The differential height compensates for the pressure drop which allows the pulp to flow into the interstage screen.

Normally the mineral processing separation operates with a pressure that is relatively low to that of the pulp at the exit launder.

Note both mineral processing separating and mineral processing separating pumping are easy to clean and maintain.

This is because they form an integrated unit that is easily removable for regular cleaning and maintenance.

How Does Carbon-In-Leash Compare To Carbon-In-Pulp In Interstage Screen?

Normally interstage screen operates concurrently using the carbon-in-pulp and carbon-in leash operations.

These operations help separate the gold ore from the activated carbon.

 Carbon in pulp

Carbon in pulp

Carbon-in-leash and carbon-in-pulp are both applicable in the interstage screen during gold adoption and carbon leashing.

For carbon-in-pulp, the first activity involves leashing and then adsorption of the gold.

In carbon-in-leashing involves simultaneous activities of absorption and leashing of carbon.

As the extraction takes place the interstage screen is enhanced with a wedge wire which separates the carbon from the slurry.

In both carbon-in-leash and carbon-in-pulp involves a series of operations that occurs simultaneously from one tank to the other till the last tank.

Carbon on the other hand flows concurrently from the last tank to the first one which prevents mixing or blocking of the interstage screen.

Both carbon-in-leash and carbon-in-pulp methods,

Normally the adsorption tanks are arranged on a horizontal same level or a convectional cascading sequence.

The difference between carbon-in-leash and carbon-in-pulp;

It is to what extent the leashing of gold takes place before the adsorption of carbon.

During carbon-in-leash addition of carbon takes place simultaneously into the leashing tanks.

This means that the leashing and adsorption of carbon take place all at once. Simultaneous absorption and leashing help to curb the reduction of the gold ore that is normally meant for activated carbon.

But in the case of carbon-in-pulp leashing of carbon takes place before the adsorption of the carbon.

In most cases, the carbon-in-leach operates with a maximum of 6 to 10 adsorption tanks.

In What Size Can You Get The Interstage Screen?

 Interstage screen

Interstage screen

Ideally, there is no standard size when it comes to the interstage screen.

The interstage screen comes in different sizes depending on what a client wants and the intended purpose.

We have an Interstage screen with different size slots, wire width, aperture size, and different lengths.

All these aspects reflect the final throughput of the pulp and carbon leashing by the interstage screen.

The size of the interstage screen varies from 500 to 100 microns, this gives you a wide option to choose from.

Normally we work with the sizes that the clients suggest to achieve quality and meet our clients’ requirements.

How Do You Choose The Right Interstage Screen Size?

To determine the right side of the interstage screen,

It’s important to first consider the following aspects the slot size and the wire width.

Normally, the aperture size of the interstage screen depends on the range of carbon size.

Aperture sizes are available in all standards which include the cylinders.

To ensure continuous tolerance of the apertures control instrumentation and advanced measurements measures should always be put into place.

For instance, the carbon-in-pulp has a high release angle which improves the open area thus resulting in higher throughput of pulp flow.

It also results in minimal blinding of the interstage screen.

Is Interstage Screen Durable?

Yes, the interstage screen is very durable.

The interstage screen is made of stainless steel.

Stainless steel has very high-quality features such as high resistance to corrosion and abrasion.

It’s also a tough metal which means it cannot

Be damaged by the outside and inside pressure exerted but the pulp and the carbon leash.

How Does Mineral Processing Separating Compare To Mineral Processing Separating Pumping Interstage Screen?

Mineral processing separating and mineral processing separating pumping are two technologies that apply in carbon leashing.

Mineral processing separating and mineral processing separating pumping contains a wedge wire screen which is submerged under the pulp operating system.

After the installation of these interstage screens the pulp normally flows upwards while retaining the filtered carbon on the outside.

Mineral processing separating interstage screens is normally utilized in circuits where the tanks have been installed in differential heights.

Normally, the height differential concept helps to overcome a pressure drop. This intern allows the pulp to flow through the plant.

Ideally, the pulp levels should be relatively higher in the tank than in the pulp exit launder.

Mineral processing separating pumping interstage screen is initially installed in circuits.

In this Interstage screen, the pulp levels and tanks are both on the same level that is the horizontal elevation.

To curb the pressure, drop, an upcoming impeller should be incorporated around the mineral processing separating pumping.

This impeller pumping process allows the pulp to move from one tank to the next tank.

Both mineral processing separating the interstage screen and mineral processing separating pumping has an integrated unit.

This integrated unit comes from the screen and the drive which is so easy to remove for regular cleaning and maintenance.

Mineral processing separating pumping operates on the same horizontal level of operations.

This makes it better over the mineral processing separation as it requires minimal civil construction requirements.

How Much Does Interstage Screen Cost?

The cost of interstage screens is not uniform but rather differs depending on the following factors. They include;

  • Size of the Interstage screen: The cost of an interstage screen varies depending on which size you want.

The amount of carbon leashing you need to filter guides you on which size to go for and at what cost.

  • Type of material used in making the Interstage screen: The Interstage screen is made of stainless steel metal.

However, this material varies depending on the different properties and the area of application.

For instance, we have 304 stainless steel which is different from 340 stainless steel.

Due to the obvious characteristics of these two interstage screens, the cost also varies.

  • The cost of the interstage screen also depends on the maintenance measures required.

For an Interstage screen to work efficiently constant cleaning and maintenance are important.

  • The cost of an interstage screen also differs from the thickness of the screen. Thicker interstage screens tend to do better in terms of durability which in turn influences the actual cost of the Interstage screen.

More so the thick interstage screen is capable of providing better carbon leashing.

  • The cost of an interstage screen also varies depending on the length of the interstage screen you need.

The longer the Interstage screen the higher the cost whereas the smaller the length the lower the cost of the interstage screen.

What Factors Should You Consider While Purchasing Interstage Screen?

Interstage screen structure

Interstage screen structure

While buying an interstage screen there are important elements you should consider to prevent investing in the wrong Interstage screen.

It’s important to first understand the kind of interstage screen you need, the purpose, and also the long-run service the interstage screen will provide.

The following are some factors to consider while purchasing an interstage screen. They include;

  • The durability of the interstage screen: it’s important to consider the lifespan of the interstage screen.

We have a quality interstage screen that will give you longer services for a long period.

This minimizes constant replacement or purchase of interstage screens.

More so, the interstage screen is made of a material like stainless still.

Which is a top-quality metal and has high resistance to abrasion and corrosion.

It’s also important to ensure regular cleaning and maintenance of the interstage screen.

  • The cost: it’s important to first evaluate the cost of the interstage screen before purchasing.

Cost varies depending on the size, quantity, and also the kind of material used in making the Interstage screen.

The cost of a 430 stainless steel interstage screen is not the same as a 304 stainless steel interstage screen.

Therefore, set your budget and work within it to get a suitable and quality interstage screen.

  • The size of the Interstage screen you need:

Interstage screen comes in different sizes depending on the quantity of carbon leashing activities.

From 500 to almost 100 sizes are available.

It’s therefore important to first establish the size of the interstage screen you want before purchasing one.

We also guide all our clients depending on the description they provide to us.

  • Maintenance cost: how cheap or expensive will it be to just maintain the interstage screen if you acquire one is very vital.

The maintenance cost of the interstage screen should be relatively low.

To allow affordability and offer long-lasting services of carbon leashing.

  • The efficiency of the interstage screen: quality and efficiency of the interstage screen are very paramount.

Ensure that the Interstage screen is efficient.

This is by ensuring or getting affirmation of its continuing operations during the extraction.

The interstage screen should have a high capability of blocking and isolating all the leashed carbon from the pulp.

  • How easily can you get a replacement in case of damages:

It can be a hassle buying an interstage screen without the knowledge of the availability of a replacement in case it’s non-functional.

Always ensure you check on the return policy to prevent incidences of buying non-functional interstage screen which is irreplaceable.

  • User-friendliness: how easy can you operate the interstage screen, the installation process also matters a lot.

How easily can the interstage screen be replaced and can you do it or does it require specialty.

What Is Interstage Screen Made Of?

Ideally, the type of material used in designing the interstage screen determines the durability, quality, and efficiency of the Interstage screen.

We provide an interstage screen made from the best and quality metal of stainless steel.

We have a variety of stainless-steel metals used in making the interstage screen. They include 430 stainless steel and 304 stainless steel. Some of the features that stainless steel metal has include;

  • High abrasion and corrosion resistance
  • Stable performance
  • Toughness
  • Great mechanical behavior
  • High durability.

It’s therefore important to always factor in the material used in making an interstage screen from a better transition in carbon leashing.

Does Interstage Screen Require Regular Cleaning and Maintenance?

Regular cleaning and maintenance of the interstage screen not only save on cost but also increases the durability of the interstage screen.

More so, it’s easy to remove the interstage screen whenever you need to conduct regular cleaning and maintenance.

Interstage screen hardly clogs aids surrounded by the V-shaped wire all-round the cylinder that minimizes contact of particles to the Interstage screen.

This effect results in a maximum area of flow and more operational efficiency.

What Are The Applications Of Interstage Screen?

The interstage screen is a wire wedge screen which is a vital component during carbon leashing.

The interstage screen works handy through carbon-in-pulp and carbon-in-leach methods;

to prevent carbon from going down the circuit during the gold extraction process.

The interstage screen comes in two types that are the mineral processing separating and mineral processing separating pumping.

Both of the interstage screen have to be submerged into the pulp to allow the pulp to flow through it while preventing the blinding of carbon.

At FilSon Filters, we have a range of filtration accessories such as well screen, Coanda screen, hydro screens, sieve bend screens, intake screen, and DSM screen, amongst others.

Contact us now for all your Interstage screens.

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