Thickeners are used in continuous process applications where liquid-solid separation by sedimentation is involved. Thickeners have three basic purposes: ... This is used to raise the rakes above the mud bed, if the solids are not being removed from the thickener quickly enough. It promotes dependable, continuous operation by providing adequate ...
A schematic of the thickening experiment and detailed parameters for this thickener are shown in Fig. 1. The thickener consists of a conical body tank, a central feedwell with an annular shelf inside, a conical deflector, and four rakes driven by a central shaft. A rectangular feed pipe is tangentially configured with the feedwell.
The measurable parameters that can be used for thickener control include thickener feed flow rate, feed density, underflow density, overflow clarity, bed level, bed mass, rake torque, rake height, solids settling rate and underflow rehology.
A thickener with center hydraulic driving and hydraulic automatic rake lifting. ENG. Português; ... Inner Mongolia 990,000 tpa Lead-zinc Mineral Processing Plant. RELATED PRODUCTS. Efficient Improved Thickener. Efficient Thickener.
What is a thickener? A thickener is generally used in slurry applications and in waste water management where large scale separation of unwanted fine-grained solids and liquids is required. The thickener from Propel Industries produces high density underflow slurry and clear overflow water. Up to 85 to 90% water is recovered from the feed. The
Rake Thickeners use the same decantation principle as vertical thickeners. The rake mechanism agitates the sludge with its rotary movement, pushing it to the bottom. The discharge is automatic and adjusted according to the rake's …
9m hydraulic automatic thickener is delivered oversea. It is applied for the Zinc concentration (from flotation plant) thickening. The feed pulp include 25-28 % solid, underflow …
7 Product portfolio HRT HRT-S Design factors Diameter (m) 1 - 125 3 - 10 · Feed rate t/hr or m3/hr Sidewall (m) 1.8 - 3.6 1.8 - 2 · Solids residence time / compaction depth · Clarification zone depth · Geometry Floor slope 1:6 40˚ · Floor slope driven by yield stress and slurry transport
This thickener uses hydraulic drive, and core PLC auto-induction pressure sensor signal realizes hydraulic automatic rake lifting. Besides, configured automatic dosing system make it …
Diefenbach thickeners are comprised of a tank, feed pipe feedwell, rake (and pickets, depending on the thickener style), a bridge containing the rake drive mechanism, and a chemical dosing system. ... Auto-dilution options further increase the rate of settling of particles to reduce the size of equipment required and maximize thickener clarity ...
Based on the impact on rake operation of different height and concentration of tailings in the thickener,the stress of rake was analyzed,and a torque model with complex structure rake was proposed.According to the actual phenomenon,the thickener was divided into two zones,the fluid zone and granular zone considering material's distribution in the thickener,and granular …
The discharging is automatic and adjusted to the rake effort, in order to reach the desired thickness. Sensors will give the opening input to the thickener discharging valve and the sludge will go through, to the Bifang. ... 24 meters width for the top of the range horizontal rake thickener by Matec. We usually suggest this typology of ...
three thickeners of 125m-diameter, all with E-DUC auto dilution . systems and 10 M lb-ft peripheral traction drives, but with rakes designed for 20 M lb-ft. More than a decade later, with continued successful operation . of these three thickeners, the same customer expanded its . operation, and again selected FLS to supply an additional three
Thickening or dewatering may be defined as the removal of a portion of the liquid from a pulp or slime made up of a mixture of finely divided solids and. ... Scraper blades or rakes, driven by a suitable mechanism, rotating slowly over the bottom of the tank, which usually slopes gently toward the center, move the material settled on the bottom ...
Traditional thickeners rely on manual or semi-automatic rake-lifting systems, where operators adjust the rake position based on visual observations or pre-set schedules. However, these methods can be inefficient, leading to suboptimal performance, increased energy consumption, and potential damage to the equipment.
The rake arms and blades in a thickener require regular inspection and maintenance. Worn-out or damaged blades can affect the movement of settled solids, leading to uneven distribution and reduced efficiency. Routine inspection, cleaning, and replacement of rake components are necessary to maintain optimal thickener operation. ...
3. Rake overload and bottom underflow automatic control. 4. Configure PLC programmer and touch screen automatic control system according to client requirements, and set the required action of thickener. 5. Automatic control of flocculant addition and automatic control of underflow discharge can be equipped according to the client requirements
Achieve a higher density underflow with our High Compression Thickener. The HCT has been designed to suit customer needs with a deeper solids bed and higher rake torque than our High Rate Thickener or conventional thickeners. Consistent and high-density underflow Maintains a constant solids inventory and solid/liquid interface
The rake mechanism stirs the sludge through its rotation movement pushing it to the bottom. The discharging is automatic and adjusted to the rake effort, in order to reach the desired thickness. Sensors will give the opening input to the thickener discharging valve and the sludge will go through, to the Bifang. WHEN TO USE A HORIZONTAL RAKE ...
In part 2 we will discuss advanced control strategies for Minerals Thickening. top of page. COMPANY. ABOUT US. GALLERY. ANALYSERS. SMARTDIVER. SMARTDOSE. AL CARK. OSCA-G2. AL DCIK. ... mud layer height and rake torque and then maximize the concentration of solids in the thickener discharge and minimize the consumption of the …
Special attention is given to the design of the thickener feedwell (for high efficiency) and specially profiled rake blades for maximum transfer of viscous and heavy material at minimal torque …
A thickener with center hydraulic driving and hydraulic automatic rake lifting. Crushing Screening Grinding Gravity Separation Magnetic Equipment [email protected] 0086
It should be remembered that both the thickener rakes and the underflow pumps (or valves) transport the thickened underflow. The size of the solids inventory determines the bed depth and the residence time that solids will experience in the thickener. This, in turn, determines the underflow slurry rehology and the water recovery to overflow. ...
To further clarify the dewatering performance and torque evolution during the tailings thickening process, a self-made rake was connected to a rheometer to monitor the shear stress and torque. The dewatering performance of the total tailings was greatly improved to a solid mass fraction of 75.33% in 240 min. The dewatering process could be divided into three …
In order to explore the effect of rake rod number(RRN) and rake rod arrangement(RRA) on the tailings thickening performance, an experiment was conducted on a copper mine's tailings. ... A Theoretical Model for the Rake Blockage Mitigation in Deep Cone Thickener: A Case Study of Lead-Zinc Mine in China. Z. Ruan Yong Wang A. Wu S. Yin Feiying Jin ...
The feed flux of lead/zinc tailings was 0.254 t·h−1· m−2 with a flocculant (high molecular weight anionic polyacrylamide) dose of 20 g/t. The thickened solids bed was sheared by a rotating rake at a rate of 0.2 rpm. The underflow was recirculated at a flux of 0.5 t·h−1·m−2, which can introduce additional shear stresses into the bed.
This document presents a mathematical model for predicting rake torque in paste thickeners. The model shows that rake torque increases with underflow concentration and is modeled as a polynomial function of concentration. Bed height has a slight effect on rake torque, causing around a 0.27% variation. The model was confirmed using operational data from a lead-zinc …
Automatic control device for high-efficiency thickener is a product that we developed through many yearsof practice,it is a system realizing the interface relatively constant mainly through using the automaticdetection of flocculation layer in the thickener and the automatic controlling speed of underflow pump of the thickener which is converted from electrical signals.It is a high ...
The thickening equipment of gold cyanide factory adopted hydraulic motor driving center thickener, the capacity does not meet expected goals, and the timing of rake lost working hours, the working efficiency is low. On this basis, the client increased two improved hydraulic motor driving center thickener.
DOI: 10.1016/j.mineng.2021.107043 Corpus ID: 240519440; Micro-scale mechanism of sealed water seepage and thickening from tailings bed in rake shearing thickener @article{Jiao2021MicroscaleMO, title={Micro-scale mechanism of sealed water seepage and thickening from tailings bed in rake shearing thickener}, author={Hua-zhe Jiao and …
Considerations include rake arm design, rake torque requirements, and the speed of rotation. Proper rake design ensures effective solids removal without disturbing the settled …
A thickener with center hydraulic driving and hydraulic automatic rake lifting. Sedimentation Area. 28~1590 m 2. Xinhai is a professional manufacturer of thickener used in mineral …
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.