Chemical dewatering agents for mineral processing

Analysts have been raving about how mining firms are set to record bumper will increase in revenue due to rising international commodity costs. But that notion is based on the idea that key components in crucial phases like mineral processing have been followed to the hilt.
The aims of increasing grades and recoveries of mineral aggregates environmentally pleasant, safely and cheaply would have been scrupulously implemented. Yet, in reality, missteps (poor planning and execution) within the filtration processes might be the distinction between increase and reduction in revenue. As far as filtration goes, fantastic margins could make a huge difference.
Reports indicate that even the utilization of advanced filtration technologies corresponding to decanter centrifuges, screw presses and belt presses, amongst others, does not offset poor implementation of filtration. Unfortunately, moisture levels that do not meet the edge (low or high) are frequently encountered. Most usually, this is attributable to overlooked components that impair the method of filtration. So, if mining companies are to realize environment friendly filtration, they’ve to seek sustainable ways of managing these methodically. And one of the sure-fire methods is the right use of chemical dewatering brokers in filtration processes. Chemical dewatering agents – which embody surfactants, flocculants, polymers, sulfonates, and sulfates – are largely used to regulate moisture levels and improve throughput in filter applications. That is why mining firms must be extra explicit concerning the nature of the dewatering agents and the method in which they apply them (dose).
Why chemical dewatering agents have turn out to be necessary
There is elevated obligation on mining companies in the greatest way they undertake their filtration processes. This is due to the rising value in operating costs which is impacting on, growing scarcity of viable ore bearing rock, in addition to stringent environmental legal guidelines and regulations.
Cost efficient software and efficiency
Mining corporations can solely take benefit of their rising international commodity costs in the occasion that they improve efficiency and comprise prices. However, the rising oil prices, on account of the Ukraine War will offset any envisaged enhance in revenue.
Another noteworthy side is that skyrocketing vitality prices lend more credence to the necessity for sound utility of filtration processes. This is considering that filtration is an energy-intensive process. When poorly applied, Savings leads to consumption of extra vitality, which translates in further expenditure.
This necessitates that mining companies leave no stone unturned in their efforts to improve efficiency and contain costs from every obtainable avenue. One of the obtainable avenues, as regards filtration, can be within the sound application of chemical dewatering agents.
Environment Social and Governance (ESG)
Environment Social and Governance (ESG) is no longer an option but an integral part of their operations, with points earned from sound reporting used as a think about figuring out entry to capital. ESG regulations and guidelines bind mining firms to be accountable for the impact of their actions on the surroundings, host communities, and cling to good governance values. Pertaining to environmental friendliness, disposal legal guidelines stipulate sustainable measures governing the disposal or reuse of sludge. Usually, untreated or inadequately treated sludge contains organic chemical substances, poisonous metals, chemical irritants and pathogens, which may cause several ailments. When disposed of, the waste disrupts aquatic life and poses serious health hazards in water our bodies.
READ: Tanzania inaugurates consuming water plant in the Coast Region
Alternatively, the usage of applied sciences that leave a small footprint on the setting is very beneficial. For instance, from a filtration perspective, utilizing a more environmentally friendly (less hazardous) chemical dewatering brokers could be preferrable to xanthates. Xanthates include sodium ethyl xanthate (SEX), sodium isopropyl xanthate (SIPX), sodium isobutyl xanthate (SIBX) and potassium amyl xanthate (PAX).
Health and safety
Xanthates could also be effective in keeping moisture at a traditional level, however they could pose well being and security risks. Studies performed in numerous countries present the hazards of Xanthates publicity to human health.
Moreover, there is a high safety risk connected to excessive moisture content of transported mineral merchandise (commonly known as Transportable Moisture Level (TML)). When a ship is carrying ore with a high moisture content material (beyond the TML), there could be always a risk of foundering. In the previous 30 years, a minimal of 24 accidents that occurred had been attributed to cargo liquefaction.
Mistakes in dewatering software
For efficient filtration, mining corporations should establish the widespread lapses that impair filtration and result failure to meet moisture degree targets. More often than not, the following factors have an impact on the finish result – modifications in feed fee (fluctuations on the milling feed fee and grinding media), chemical and mineralogical composition or particle size distribution. The ensuing dewatering deficiencies can impede the following processing steps. A working example is in iron ore pelletising operations, the place moisture levels below 9% are required for pellet formation. Too much or too little water creates a narrow moisture range for optimal course of situations. With reference to the particle size distribution, small particle dimension becomes more and more tough to dewater.
In order to address these challenges, a mining company may be prompted to increase capital expenditure (CAPEX) or further useful resource allocation in course of course of modification to have extra or bigger filtering capabilities. In most instances, the situations aren’t predicted earlier in the design. Above and past, whereas this task is being carried out, there can be operational downtime, resulting in lack of productiveness.
Addressing dewatering shortcomings
Addressing dewatering shortcomings can either pose a problem or an opportunity, depending on how a mining company handles it.
There is a saying which matches, “A bad carpenter blames their tools”. Most usually, dewatering failure, which is reflected in high moisture content, is because of poor choices and execution of processes. This is considering that there are complicated variables associated with dewatering.
Demonstrably, the focused stage of dewatering mineral aggregates is attainable where the feed price is constant, particle measurement distribution and mineralogical composition. Nevertheless, it has been consistently proven that the right use of chemical dewatering brokers is a viable choice to maintain manufacturing stable during periods of challenging scenarios in dewatering.
For dewatering aids to supply the desired output, precision is critical. Chemical dewatering agents must be applied at right factors. This is on condition that completely different dewatering aids have various processes and intensities, which considerably affect the performance of mineral sludge dewatering.
Numerous positive aspects
There are numerous gains from appropriate use of chemical dewatering agents in mineral mixture filtration. Dewatering agents guarantee a predictable, cost-effective operation the place there could be little to no requirement for CAPEX or extra resource allocation. Also, attaining moisture target – reaching the dewatered state – is inside shorter cycle instances, growing filtering productivity.
Generally, what a mining firm will get from a chemical dewatering agent is an operational resource that enables a safer, stable and reliable process, with noticeable reduced production prices via filtration. Effective filtration is considered one of the avenues obtainable on the disposal of mining companies to ensure that they benefit from high commodity prices.

Leave a Comment