Colloidal silica presents significant challenges in the mineral processing industry, particularly during the digestion of minerals in strong acids or at elevated temperatures. The release of large amounts of silicic acid, which can polymerise in solution to form colloidal silica and gels, leads to a multitude of operational problems. These issues include interference with flocculation, initiation of crud formation in solvent extraction (SX), decreased SX extraction kinetics, and increased SX phase disengagement times. To address these challenges, A S Harrison & Co, in partnership with Innospec Chemical Performance, introduces DEHSCOFIX® SC12, a colloidal silica coagulant designed to improve mineral processing efficiency.
Colloidal silica, when formed during mineral processing, can significantly impact the efficiency and effectiveness of the extraction processes. It disrupts flocculation, leading to poor solution clarity and increased operational difficulties. In solvent extraction, colloidal silica contributes to crud formation, which can decrease extraction kinetics and prolong phase disengagement times, ultimately affecting throughput and product quality.
DEHSCOFIX®SC12 from Innospec Chemical Performance is engineered to combat the adverse effects of colloidal silica in mineral processing circuits.
Before
After
The coagulant should be added to the Liquid Solid (L/S) separation circuit before the addition of flocculant. In a Counter Current Decantation (CCD) circuit, it is best added to the CCD1 or lead CCD launder, while in filtration circuits, it should be added before the filter.
DEHSCOFIX® SC12 binds selectively to colloidal silica and precipitated silica in the leach solids. When added directly to leach discharge, it improves settling in high-grade thickeners, CCD circuits, and clarifiers.
The key to its effectiveness lies in thorough mixing and shearing, which promotes coagulation without concern for shearing the coagulated particles.
DEHSCOFIX® SC12 offers numerous benefits for the mineral processing industry:
The innovative formulation of DEHSCOFIX® SC12 by Innospec Chemical Performance makes it an indispensable solution for tackling colloidal silica challenges in mineral processing. Its ability to selectively bind and coagulate colloidal silica particles ensures dramatic improvements in solution clarity, extraction efficiency, and overall plant productivity.
Partner with A S Harrison & Co and leverage the power of DEHSCOFIX® SC12 by Innospec to optimise your mineral processing operations and overcome the challenges posed by colloidal silica. For more information on how DEHSCOFIX® SC12 can benefit your processes, contact us today.
Consisting of five business groups—Personal Care, Home Care, Agrochemical, Metal Extractions and Construction—Innospec’s Performance Chemicals provides effective technology-based solutions for these markets.
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