When designing and purchasing a spiral gravity chute, several interacting factors goes into the design of them. These design factors include flow rate, pitch, diameter, material, intended use, and environment. How do you choose the correct spiral gravity let down chute for your product? You test it. And, you test it again. Testing on spiral gravity chutes is very important because all products flow down differently. So come to Astro and experiment on our three samples, here at Astro in Hanover, MN. We would love to assist you in the right design because we care!
It is important to know what flow rate you are trying to achieve. This is in order to design a spiral that can achieve it. Therefore, how your product behaves sliding down the chute is the biggest influence to take into account. The whole system is designed around this key element. The required pitch must be finessed to achieve the desired amount of flow that is needed, given the diameter of the chute. The flow rate is the function of the width, and the pitch you can get on it.
The right pitch is needed for your product to flow faster, but at a safe speed for minimal breakage of the items. This pitch has much to do with how a flight is stretched. The more you stretch it, the more you get a larger pitch. However, there is a limit to how much a given size flight can stretch.
Our spiral chutes are made with either stainless steel or mild steel. It depends on the intended use and environmental factors, of course. Do you require food grade vs non-food grade material? Plus, consider temperature and atmosphere when choosing the material and finish.
Designing spirals is not an exact science. That&#;s why we&#;re here to assist you. All our spiral chutes are customized and fitted precisely to each unique environment and specification. Our team collaborates with our customers on design, fabrication, and implementation. Plus, there are virtually no limitations on the length of our spirals. However, maximum length of a spiral chute in &#;one piece&#; is 40&#;.
It is important to work with experienced designers and fabricators, indeed. We have been manufacturing food processing equipment for over 30 years. Therefore, we have in-house capabilities for development, design, testing, and full fabrication. So call today to make an appointment to test your products!
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What is Spiral ChuteSpiral chute is a sorting equipment that separates concentrate and tailings based on the density and particle size of materials. Suitable for iron ore, ilmenite, chromite, pyrite, tungsten ore, tin ore, tantalum niobium ore, placer gold, zircon, rutile, monazite, phosphorite, and other non-ferrous metals, rare metals, and non-metallic minerals with a specific gravity difference of 0.3-0.02 millimeters. It can also be used for tailings pond re selection and disposal of large amounts of abandoned tailings.
Working PrincipleWhen the slurry enters the spiral chute, the movement trajectories of materials with different particle sizes and densities in the spiral chute are different due to the combined effects of gravity, centrifugal force, friction force, and hydrodynamic pressure on light and heavy particles.
The final concentrate with high density and particle size is discharged at the inner edge of the spiral groove, while the tailings with low density and particle size are discharged at the outer edge of the spiral groove. Spiral chutes are commonly used equipment in mineral processing plants for classifying and selecting fine-grained minerals.
Structure Features
The spiral chute is composed of eight parts, including a mining hopper, a feeding groove, a spiral groove, a product cutting groove, a receiving groove, and a channel steel bracket (including a cross or triangular frame) motor, and a vibration motor. The specifications include diameters Φ mm, Φ mm, Φ mm, Φ 900mm, Φ 600mm, etc.
1. Distributor HopperThe ore distributor hopper is a slurry distribution device of a spiral chute, located at the top of the spiral chute. The ore distributor hopper is a fixed network pipe distributor, which evenly distributes the ore slurry from the four surrounding discharge pipes to the ore feeding trough using the positive pressure of the ore slurry inside the barrel.
2. Feed TankThe feeding trough is located between the ore separator and the spiral trough. Its function is to buffer and stabilize the slurry from the ore separator, and then evenly and slowly feed it into the spiral trough along the tongue type feeding weir plate. The width of the feeding trough should be appropriate, otherwise it will affect the sorting effect.
Keefam contains other products and information you need, so please check it out.
3. Spiral SlotThe spiral groove is the main component of the spiral groove, and the mineral sorting process is completed within the spiral groove.
4. Product Intercepted SlotThe product intercepted slot is connected to the discharge end at the lower part of the spiral groove. The slurry after spiral chute sorting forms ore belts with different grades at the discharge end, and is intercepted into concentrate, intermediate ore, and tailings through the product intercepted slot.
5. Product Collection FunnelThe ore collection Funnel is a concentric circular cylinder that can collect the concentrate, intermediate ore, and tailings intercepted from four product intercepting tanks by category and guide them to the next operation. The slope of the bottom of the collection funnel should be greater than 25% to ensure the smooth discharge of concentrate, intermediate ore, and tailings.
6. Chute BracketChute support refers to the pillars around the spiral slot and the upper cross shaped frame, which are made of channel steel to ensure sufficient strength. The cross shaped frame in the upper part not only supports the ore separation hopper, but also positions the four channel steel pillars.
7. Spiral UnitAccording to different processing requirements, the screw unit can be made into different layers, including single head, double head, three head, and four head structures. Each spiral groove is composed of 4-5 spiral blades connected by bolts (which can also be added), and the spiral blades are made of fiberglass (fiberglass reinforced plastic). The selection surface of the spiral groove has a specially designed wear-resistant layer, which is coated with polyurethane rubber or epoxy resin mixed with diamond sand. It has the advantages of lightweight, sturdy, and durable.
Specification ParametersModel5LL-LL-LL-LL-LL-LL-400Spiral DiameterSpiral Chute Applications
Spiral chutes are widely used in the field of mineral processing, mainly for mineral separation. The following are the applications of spiral chutes:
1. Spiral chutes can be used to separate various metal and non-metallic minerals, such as iron, copper, gold, silver, lead, zinc, quartz sand, calcite, limestone, graphite, marble, coal, etc.
2. Spiral chutes are suitable for handling ores with particle sizes between 0.3 and 0.02mm.
3. The spiral chute has a simple structure, small footprint, low investment, and fast efficiency, and is widely used in small mineral processing plants and laboratories.
4. The spiral chute can be used in conjunction with equipment such as ball mills and vibrating screens to form a complete beneficiation production line.
5. Spiral chutes are very suitable for sand mining on beaches, riverbanks, sandbanks, and streams.
How To Choose A Suitable Spiral Chute
When choosing a spiral chute, the following 7 tips can help you easily choose:
In actual production, selecting spiral chutes requires considering multiple factors and making the correct decision based on the mine situation.
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