Engineered Design

Custom-designed chutes that optimize your bulk material transfer

The Weba design philosophy is simple

To provide you with holistic, total solutions for problems traditionally associated with transfer points.

The transfer chute is one of the most overlooked components in any bulk materials handling installation, but this relatively low-cost item can be the source of numerous major problems.

Armed with information from flow studies, on-site investigations, and extensive operational experience, we designed a transfer chute that proactively eliminates these problems: the award-winning, patented Weba transfer chute system.

Design criteria for Weba Chutes

The design criteria for bulk solid transfer chutes are based largely on steel chutes, which may be fitted with steel alloy, ceramic, or rubber linings to reduce wear and costs, and facilitate easier maintenance.

Assuming material characteristics are known, the design of chutes depends on the following factors:

  1. Material trajectory into the chute
  2. Material flow from the initial impact area​​​​​
  3. Material flow through the chute​​​​​
  4. Material flow through the discharge area​​​​​

Structure of Weba Chutes

Visual evidence including video photography indicates that material flows through the Weba chutes in a pattern referred to as “the supertube”. This flow structure eliminates a number of problems experienced in steel-lined chutes.

Figure 1 General Layout of a Reverse Flow Weba Chute

Figure-1-954x1024

Whether you’re starting a new project or need a Weba chute integrated into an existing project, we’ll be there to make sure you get all the advantages

These advantages include:

  1. Minimized frictional effects compared to normal steel chutes. In Weba chutes, material flows in the form of a “supertube” and is not continuously in contact with stationary material, unlike conventional chutes.
  2. Due to material essentially flowing on material, wear of steel liner components, material degradation, and dust are significantly reduced, decreasing safety hazards, maintenance downtime, and costs.
  3. Ultimate control of the flow and cross-sectional area at the discharge ensures lower wear and tear, degradation of material, and spillage problems at the discharge.
  4. A number of factors that require design in conventional chutes are eliminated. These include determining frictional factors that are dependent on bed depth and the calculation of the effects of drop or free fall heights in the chute.
  5. The material collected between the wear plates absorbs sound, reducing the external noise levels of Weba chutes.

We have the knowledge, skills, and experience to improve the transfer of any bulk mining material

Our custom-engineered or retrofitted chute systems will make the transfer of even the most challenging materials safer, cleaner, more productive, and cost-effective

See some of our past successes:

With Weba Chutes you will receive a trusted material handling system suitable for all kinds of mines. For many new to the industry, the term “materials handling” conjures up a number of ideas, not all of them correct. It can seem like a vague term, but it’s actually quite easy to understand.

Materials handling includes the entire process of moving, controlling, and protecting materials as they are manufactured, stored, used, disposed of, or distributed both into and out of the mine. The process is done in such a way that the profitability and the productivity of the mine are improved.

The Weba Chute can quickly and easily become the material handling system of choice, regardless of the materials that a mine is excavating. Material handling equipment is an absolute necessity for any mine. It keeps the production process going and reduces any possible downtime due to material movement issues. When investing in any mining equipment, making sure that you have the best products is the only way to guarantee that the mine continues to function optimally. Inferior mining chutes can lead to costly downtime as well as pricey maintenance and repairs.

What makes Weba Chute Systems & Solutions the best?

Let us begin with always important maintenance matters. Mark Baller, our Managing Director, believes that transfer points should be accorded the same importance as other minerals processing machinery. In particular, the effect of the chute’s performance on the life of conveyor belts, which can account for up to 60% of the capital cost of a bulk materials handling plant, deserves attention.

The cost of replacing a conveyor belt, not to mention the downtime associated with belt maintenance and replacement, makes it worth looking more closely at any measures that will extend the conveyor’s life. Typically, conveyors like feeders, crushers, hoppers, and screens are selected to match certain operational requirements; however, there is little emphasis on the design of the chutes transferring materials between elements. This is a mistake, as chutes are essential elements in a bulk solids handling plant, and are also subject to operational characteristics and physical constraints. Among the most common problems on transfer chutes are spillage, blockages, and high levels of wear on the receiving belt due to major differences between the material velocity and the belt velocity. There is also a misalignment of the receiving conveyor belt, which is caused by uneven loading from the transfer chute.

Key to solving these challenges is good design. While conventional chute design often allows the uncontrolled discharge of bulk materials, a holistic design is necessary because it focuses not only on the entry and exit points, but also controlling the flow, volume, and velocity of the material being transferred. Each transfer point therefore needs to be custom-designed to control the direction, flow, and velocity of the material. Weba Chute Systems bases its designs on the ‘supertube’ effect, which often employs a cascade lining system allowing 95% of material to run on other material at all times. This may also be achieved using conventional lining systems. One of the designer’s aims must be to achieve controlled transfer of material onto the conveyor belt, reducing wear and tear on belts while also minimizing the impact that creates dust. The results are cost savings for customers and better occupational health and safety compliance. The ‘super flow effect’ is designed into our products using sound engineering principles and sophisticated 3D software. We also use Discrete Element Method (DEM) simulation as a verification tool.

Although a material handling system has a long life span, there might come a time when maintenance becomes a necessity. At Weba, we have the perfect solution for all belt maintenance requirements. Years of design, innovation, and invaluable field experience mean that we know exactly what needs to be done when it’s time for maintenance.

Weba Chute System Benefits

You’ll undoubtedly enjoy numerous benefits when you make the smart choice of investing in a proper, well-designed transfer chute. Here are some of the great benefits of our chute system that you can look forward to:

  1. A cost-effective material transfer solution
    With each chute system we manufacture, we aim to use the most cost-effective technology and materials, along with years of exceptional experience to solve your material transfer problems. We never cut back on quality, so you can always expect a superior product.
  2. High Safety Standards
    We emphasize environmental protection and workplace safety, to prevent events on-site, which could harm employees and set back productivity.

For more information about how you can change the way that your mine functions, contact us.

Get in touch