Thickeners: How they Operate. The most common solids-liquid (S/L) unit operation is thickening. A wide variety of thickeners are used including conventional, deep well, paste, high rate and clarifiers which is a thickener subclass used for removing solids from turbid or very low % solids waters. Thickeners are mechanically continuous process ...
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 …
Our thickeners are perfectly suited for the processing of and recycled fibers, broke as well as mechanical pulp. ... With over 600 units in operation, the vacuum-assisted ANDRITZ DiscFilter is regarded as key equipment when it comes to handling most demanding thickening applications. ... The ANDRITZ Drum Thickener is a simple, cost ...
Part 1 will cover problems in thickener operations caused by thickener design errors and changes in ore properties. Part 2 will discuss in detail the problems caused by mechanical and maintenance issues (including …
The common thickener has reliable operation and low operating cost and can store and buffer the feed. It is the most widely used concentration equipment in mineral processing plants. ... Different thickeners are suitable for various sites, pulp, scales, etc. If you need a thickener, you can consult our mining machinery technicians to select the ...
BrainWave stabilizes the operation of all types of concentrate thickeners, resulting in improved operation and increased production. Concentrate thickeners pose a challenging control problem, as both a nominal bed depth and product density must be maintained for proper operation. Using BrainWave, both of these objectives can be satisfied.
Pulp Paper Thickeners machine is designed for all pulp types and for every stock preparation application. Get free proposal for Thickener. English. English. Brazil. Industry Solutions. Solutions. Pulp Paper, Tissue & Boards Molded Fiber ETP. Pulp. Agro Wood Waste Paper Pulp Mill Audit Operations, Maintenance, & Product Optimization. Paper ...
In table II it is shown a Conventional thickener operation on uranium pulp compared to same service in HCT. Table II - HCT vs. Conventional thickener: Uranium pulp (Roger Summerhays, 1979) The high density underflow in the (HDT) thickeners began to replacing the conventional thickeners and HCT`s in the management of mining waste, as …
Valmet's Gravity Thickeners guarantee highly efficient broke and pulp thickening, delivering high-capacity dewatering in a compact and cost-efficient process for a wide range of paper and board grades.
As a starting point, it is assumed that the thickener, which has a thickening area of 40 m², is operating at steady-state at point no. 1. If the underflow pumping rate is then dropped from 21.7 to 16.6 m³/day …
The operation of the thickener must accommodate fluctuations – control for disturbances – in the process feed stream to deliver a clear overflow and thickened underflow. This control is achieved by manipulating both the flocculant addition and the rate of underflow withdrawal …
The Hycor ® ThickTech™ Rotary Drum Thickener (RDT) is the industry leading sludge thickener. Its performance is unmatched, with sludge volume reduction of 90% and a 98% capture rate. In addition, this superior performance is achieved with very low amounts of polymer. The RDT system is quite compact and requires less floor space than other ...
Thickener EFK is suitable for thickening pulp prior to a screw press or storage chests. In the broke preparation, it evens out consistency fluctuations, enhances storage capacity and thus contributes to stable paper machine operation. Due to its flexibility, the EFK thickener is appropriate especially for small lines and for installations with ...
The simplest use of a thickener in a metal-mining operation is to get water out of a pulp; for example, in a desert country where water is too valuable to be thrown away with the tailings. There you have a thickener treating the tailings and recovering some of the water to be sent back to the mill and used over again.
In very simple words, a thickener is a machine that separates liquid from solids. It is defined as a method of continuous dewatering of a dilute pulp, wherein a regular discharge of a thick pulp takes place which is of uniform density, concurrently with an overflow of clarified solution. ... operation, types of thickeners and factors ...
Disc thickener is a cost-effective solution for this process, as it requires less energy and produces higher-quality pulp compared to other methods. With the use of disc thickener, paper mills can reduce their water consumption and achieve higher efficiency in their pulp processing operations. How Disc Thickener Works
Thickening Equipment. Thickening equipment is the equipment that separates solid particles and media under the action of the gravity field and centrifugal …
The performance of the inclined screw thickener is based on 34 years of pulping experience. The inclined screw thickener is cost efficiency, easy installation and operation pulping device for thickening paper pulp in a consistency range of 3.0-4.0%. The consistency of output pulp can reach 10.0-14.0%.
The object of a control system on a High Rate Thickener (HRT), as on a conventional thickener, is to obtain the required underflow density and overflow clarity at all feed …
The excellent and reliable thickening performance of the gravity drum thickener is based upon 50 years of pulp dewatering experience. The PRS Drum Thickener is a simple, cost-efficient, and reliable filter for dewatering stock and broke, as well as for and recycled fibers in a consistency range of 0.5–5.0%.
Control Actions for Thickeners. There are different targets to optimize thickener performance: To ensure optimum solids content in the tailings impoundment, an underflow density target is used. …
In this way, with the help of Decker Thickener, the pulp is thickened and stored in the chest. As Washer for: – Used for removing excess water & increasing stock consistency – Provides flawless & reliable operations – All water & pulp contact areas are made with SS – Improved design of sealing arrangement to minimum fiber loss
The ANDRITZ Pulp Screw Press SCP for efficient pulp dewatering exemplifies our leadership in dewatering technology. The screw press dewaters at the highest level with several unique features. When fed with medium-consistency fiber suspensions, the press can achieve outlet dryness beyond 30%. The patented control system and a powerful …
3.1 Dynamic batch mode. This operating mode typifies a thickener during start-up and assumes the following: The thickener is initially filled with water. The feed is flocculated. The feed solids mass flow per unit area per unit time (solids flux rate) is constant. The flow of solids to zone B is endless.
It is possible to establish two modes of operation for the clarifier-thickener depending on the location of the critical concentration ... Determine the optimal flocculation dose for a pulp entering the thickener. The instrument has six main components: Tank for storing and homogenizing the pulp.
For steady state thickener operation, the outputs reveal three general modes of stable operation; permeability limited at high solids fluxes, compressibility and permeability dependant at intermediate solids fluxes and compressibility limited at very low solids fluxes. ... + Qt is the average pulp density Such a mixture is called an ideal ...
Thickening process control is the control strategy and control method to ensure and improve the solid-liquid separation index of the thickener on the premise of ensuring safe, continuous, and stable operation of the thickener. The settling mechanism of thickener is very complex. Different particle size composition, mass concentration, …
Control Actions for Thickeners. There are different targets to optimize thickener performance: To ensure optimum solids content in the tailings impoundment, an underflow density target is used. Additionally, this target ensures optimum water reclaim for the mill. A bed/mud level target is used to obtain optimum loading in the thickener …
Finding use in enhancing pulp consistency, the Decker Thickener system offered features use of latest technology support and precision tuned components that provides for flawless operations.With the system bearing superior structural finish, corrosion & thermal resistance, these provide for long lasting usage support.
The simplest use of a thickener in a metal-mining operation is to get water out of a pulp; for example, in a desert country where water is too valuable to be thrown …
What is a Thickener? In very simple words, a thickener is a machine that separates liquid from solids. It is defined as a method of continuous dewatering of a dilute pulp, wherein a regular ...
Typically, thickener controls are implemented as single loop controllers in DCS/PLC systems. These systems are challenged by long response dynamics and interaction between variables, leading to …
The authors thank sponsors of the AMIRA P266 'Improving Thickener Technology' series of projects for financial and in-kind support. Aspects of the research also received support from the Australian Government's Cooperative Research Centre (CRC) program, through the A.J. Parker CRC for Integrated Hydrometallurgy Solutions, as well …
The gold cyanide complex is then extracted from the pulp or slurry by adsorption onto activated carbon. CIL stands for carbon-in-leach. ... The barren solution from zinc precipitation is returned to the last thickener. Commercial Operations. The most well known carbon-in-pulp plant remains the prototype Homestake plant in Lead, South …
The primary purpose of thickening is to increase the solids concentration of the feed stream. Gravity settling is aided by addition of chemicals called flocculants. The inlet stream going to a thickener generally is called 'feed' or 'influent'. Overflow from the unit may be called 'overflow', 'effluent', or 'supernatant'.
The machine can thicken pulp with the consistency of 0.55 percent into stock with the consistency of 8 percent. The two stage pulp washer is best for removing ink with the thickness of 1 to 100 micrometers. Read More; Disc Thickener, ZNZ Series The ZNZ series disc thickener is a vacuum multi-disc machine without water leg. It is applied for ...
