This proposition is not a solution for every site. However, as the following case study illustrates, airdrying of paste or thickened tails can be a viable option for dry stacking and an alternative to filtered tailings. Dry Stacking With Relocation in Mind. First, lets define the term dry stacking.
The Thickener Components. As mentioned previously most of the highrate thickeners subassemblies are similar to those of conventional thickeners except for lifting devices that are not available on all units due to design restrictions. The similar components may be seen in the following links The Drive Head
High rate thickeners are designed specifically to maximise the flocculation efficiency of flocculants. They differ from conventional thickeners in feed well design, size and control. Unlike conventional thickeners, high rate thickeners must use flocculants. The basic design of a high rate thickener
THICKENED TAILINGS RHEOLOGICAL AND GEOTECHNICAL CHARACTERISTICS JAMIE SPIERS Methods for Treatment of Mine Tailings 16 17 November 2010. It can be used for drainage design interface material design. Tailings settled density Settling test 24 h (or more) drained and thickened tails material Thickening Plant Testing Four
Whereas most conventional thickeners facilitate tails piping in an underground trench, site conditions at Ok Tedi required that Outotecs design had to be strong enough for the alternative approach, yet still light enough not to cause undue stress on the thickener.
The gravity thickening design is similar to a clarifier. Thickeners are usually circularshaped; the feed is carried out through a pipe to a central hood serving as distribution and still area, with a height that has no effect on compaction or compression bottom area. Except for small thickeners, static and with hopper floo r, these units have
Thickeners as clarifiers. To maximize water reuse, the Khumani plant contracted with WesTech Engineering, Inc. to design and implement a twostage tailings thickening process. The first stage consists of two primary highrate traction slurry thickeners, each 295
The Challenger Expansion project involved the upgrade of the existing plant to increase production from 45tph to 64tph design throughput. This involved the refurbishment, relocation and installation of 850kW regrind mill from Mt Gibson WA to Challenger site complete with new mill foundations and addition of a secondary mill control room.
Thickener Rakes and Supports. Metallurgically, and mechanically, Rakes are correctly designed. From a metallurgical point, the exclusive design of the Spiral Rake imparts a continuous turning motion which conveys the thickened pulp from the outside of the tank to the center cone.
3tailings thickener would comfortably meet the required 62% underflow density. Design considerations The bridge design had to be strong enough to support the tails piping along with the feed piping. Whereas most conventional thickeners facilitate tails piping in an underground trench, site conditions at Ok Tedi required
settling velocities) could theoretically be used to design settlingthickening tanks. Although this theory is important in understanding the design of settlingthickening tanks, the reality is that when designing a settling tank, empirical values are determined and used for the design based on the characteristics of the FS in speci c conditions.
Current Trends in Countercurrent Decantation and Thickener Circuit Operability and Control J Karageorgos1, S Davies2, E Broers3 and J Goh4 ABSTRACT With recovery being important in optimising the business performance of a laterite and sulfide plant and
Figure 2. Thickener plant flow sheet. Reducing operational variability through control system improvements. Despite the design of the thickener and installation of good instrumentation, poor overall plant design, inadequate automation, or low operator focus can be contributing factors in thickeners that fail to consistently achieve the best
Tailings are also called mine dumps, culm dumps, slimes, tails, refuse, leach residue, slickens, or terracone (terrikon). Examples Sulfide minerals. The effluent from the tailings from the mining of sulfidic minerals has been described as quot;the largest environmental liability of the mining industryquot;.
Aug 23, 20190183;32;The interactions of these parameters are at the heart of thickener models. Knowing the bed depth is critical to maintaining stable thickener operation. Numerous methods have been employed to achieve reliable bedlevel measurement, including bed pressure, ultrasonic, capacitance, nuclear, vibrating probes, divers, and floats (to name just a few).
3Operation of slurry thickeners is generally a compromise between clean overflow water and underflow density. Either the 22m tails thickener will achieve a high underflow density which enables maximum water and cyanide recovery. Or it operates to improve overflow water clarity enabling a positive impact on gravity gold recovery.
Whereas most conventional thickeners facilitate tails piping in an underground trench, site conditions at Ok Tedi required that Outotecs design had to be strong enough for the alternative approach, yet still light enough not to cause undue stress on the thickener.
Advances in thickener design have improved the degree of separation possible from tailings streams, however limiting the selection criteria to just the thickener can constrain the operation potential. Integrating ancillaries, automation and operator training with the equipment can improve operational outcomes and decrease operating costs.
The performance of the tails thickener is central to cyanide and water recovery and raw water usage. FL was approached by Carpentaria gold to conduct a review performance of the 22m216; tails thickener with a focus on optimisation and modernisation
If you do go down the tails thickener route take advantage of it and add your reclaim or makeup water to the tails thickener feed and quot;washquot; cyanide solution from tails to grinding. Not sure whether you have CN destruct, but you can calculate water balance and cyanide washing that will occur.
The final point relating to beach slope is an important design parameter for thickened tailings storage facilities. In conventional tailings deposition the beach slope is very low, often around 1% (less than 1 degree) and facility design can be flexible if there is a
Thickeners as clarifiers. To maximize water reuse, the Khumani plant contracted with WesTech Engineering, Inc. to design and implement a twostage tailings thickening process. The first stage consists of two primary highrate traction slurry thickeners, each 295
How Can I Make My Horse's Mane And Tail Thicker? Part 1 By Jeffrey Rolo . The vision of a majestic horse with a flowing mane and tail is one that can take virtually any horseman's breath away, and as such it should come as no surprise that one of the more frequent horse care questions I receive pertains to exactly this topic.
Thickeners, equipped with the patented spiral scrapers and angle rakes are a distinct improvement over all types of mechanical raking devices now in use. Specifications and thickener rake design. All Thickeners have the same general specifications, varying only as to type of machine. The specifications given for one will cover all.
In Table I of the July article, quot;improve Clarifier and Thickener Design and Operation,quot; by Joel Christian (pp. 5056), the titles Vi and TSS are reversed. The first TSS is 3.1 and the first Vi is 6.045. In the overloaded case on p. 55, the underflow c oncentration should be 240 kg/m 3, not 140. Also, the dashed line in Figure 9 is not used in
The Thickener Components. As mentioned previously most of the highrate thickeners subassemblies are similar to those of conventional thickeners except for lifting devices that are not available on all units due to design restrictions. The similar components may be seen in the following links The Drive Head