Helix Spiral
Our Innovative Hard Rock Ore Recovery Equipment
Multi-Helix Spiral
OUR CLAIM: The Multi-Helix Spiral is hands down the most efficient gold concentrator available in the industry. It has a proven track record with a recovery rate of 99% of all free gold. It is a commercial-duty gravity concentrator for both alluvial and fine-milled hard rock ores and has the highest concentration ratio...
OUR CLAIM: The Multi-Helix Spiral is hands down the most efficient gold concentrator available in the industry. It has a proven track record with a recovery rate of 99% of all free gold. It is a commercial-duty gravity concentrator for both alluvial and fine-milled hard rock ores and has the highest concentration ratio and highest recovery rate of any gravity concentrator on the market today.
The Reverse Multi-Helix Spiral Concentrator is available in three models: the 24"Rougher, the 16" Cleaner, and the 16" Finisher. Each concentrator can be set up as a continuous or batch feed. All units are commercial-duty gravity concentrators for both alluvial and fine-milled hard rock ores.
Oro Industries's Helix Spiral concentrators can achieve the highest concentration ratio and recovery possible with any type of ore that can be concentrated by gravity. The design and engineering principles of the multi-helix spirals inside the concentrator allow for full adjustment to the ore matrix or concentrate, yielding a peak concentration ratio with virtually no loss of gold.
With this unique ability, it means achieving higher production rates and a reduced amount of concentrate, resulting in a smelting-grade concentrate or finished clean gold.
The Helix Spiral can be set up in parallel, series, or as a stand-alone concentrator; in parallel for higher production rates, in series for mixed minerals, and stand-alone for pure gold recovery. The configurations are unlimited.
Moreover, by using a 24" Rougher to feed a 16" Cleaner, the cleaner feeding a 16" produces sellable or smelt-grade gold in your hand, without anyone touching it.
Cleaner Model Spiral Concentrator
This is a continuous or batch feed secondary concentrator for processing primary sluice concentrate, primary jig concentrate, centrifuge concentrate, and milled hard rock ores. When set up as a cleaner, the 16" or 24" spiral concentrator is perfect for the application of mercury recovery and tailings projects. For the highest production performance, it is recommended to classify material to minus 1/4".
Finisher Model Spiral Concentrator
The finisher model can be used in conjunction with our standard Secondary Cleaner to shorten clean-up time when concentrating large volumes or in certain custom applications. Its highest production performance is with fine concentrates of materials less than 1/8". Up to 90% of all concentration and clean-up needs can be achieved with the standard 16" Secondary cleaner. Ask us for advice about your particular application.
24" Rougher Model Spiral Concentrator
When used as a primary concentrator for both alluvial and milled hard rock ores, the 24" Spiral is ideally suited for mixed mineral hard rock ore concentration. This concentrator can't be beaten when the job calls for a continuous concentrator for Gold, Galena, Chalcopyrite, and Sulfide-type hard rock ores. It replaces jigs for heavy black sand ores as well. Its fine gold recovery ability is more than 90% to 200 mesh in production and 99% to above 140 mesh.
Specifications
16" Reverse Multi-Helix Spiral Cleaner Specifications
• Production Rate: 1–2 tons/hour
• Water Consumption: 15–20 GPM @ 20–40 PSI
• Power Requirements: ½ hp @ 120V/50 or 60Hz
• Dimensions: 84" x 36" x 60" (L x W x H)
• Powder Coat Finish
• Power Supply and Water Pump Not Included
24" Reverse Multi-Helix Spiral Rougher Specifications
• Production Rate: 12–15 tons/hour
• Water Consumption: 40–50 GPM @ 20–40 PSI
• Power Requirements: 3 hp/Single or 3-Phase 220/440V/50 or 60Hz
• Dimensions: 153" x 34.5" x 77" (L x W x H)
• Powder Coat Finish
• Power Supply and Water Pump Not Included
Theory of Operation
The actual "working surface" of the concentrator is made up of a series of leads running lengthwise in reverse in a critical tight spiral pattern along the inner...
The actual "working surface" of the concentrator is made up of a series of leads running lengthwise in reverse in a critical tight spiral pattern along the inner barrel. These leads have a set angle on the uphill side and a counter angle on the downhill side, and they are larger in height and width at the rear of the barrel than at the front. The exact angles and dimensions to create ultimate efficiency took hundreds of hours of trial and error testing.
During operation, the decreasing height and width of the leads create the classifying effect as the ore passes through the barrel. As the ore is being classified, the gold and heavy concentrate settle into the bottom of the groves made by the leads and are conveyed upwards (in reverse).
As the classified ore reaches the upper portion of the barrel, a set of angled spray heads continuously wash back the lighter gangue material while the gold and heavy concentrate continue moving forward, falling out of the groves and into the concentrate holding bin. This is a continuous process, allowing the gold concentrate to be recovered in a hands-off fashion while the waste is being discharged out of the rear of the Spiral.
For larger volume processing, multiple Spirals can be installed in series, with the ore being feed automatically from one Spiral to the next.
Versatility
Our Spirals can be used for the secondary and final processing of sluice concentrates, primary jig concentrates, and centrifuge concentrates. They are fully adjustable, allowing...
Our Spirals can be used for the secondary and final processing of sluice concentrates, primary jig concentrates, and centrifuge concentrates. They are fully adjustable, allowing for rough and tight cuts. These machines adjust to a wide range of ores and concentrate to achieve a smelting-grade product. They are also great for bulk sampling and testing head ores through continuous feed or batch feed. The equipment's portability allows you to move around your site or work off-site (indoors or outdoors).
These products classify any heavy metal or heavy mineral, such as gold, silver, platinum, tantalum, barite, scheelite, sulfides, tin, galena, lead shot, and bullets, etc. The spiral is also great for the recovery of mercury and tailings projects. All things considered, the Helix Spiral is the most versatile and practical piece of mining equipment you will ever own!