Dust Control for Critical Minerals Mining Operations

Dust Control for Critical Minerals Mining: Lithium, Rare Earths and Battery Metals

Australia’s critical minerals sector is experiencing an investment surge unlike anything in the country’s mining history. As of October 2025, 432 major resource and energy projects were under development — up from 407 a year earlier — with 72 new projects added in a single year. Rare earth projects alone have attracted A$3.37 billion in Australian government loans, plus another A$5.23 billion from foreign allied governments. The US-Australia Critical Minerals Framework Agreement, signed in October 2025, commits both nations to capitalise on existing mining and processing operations and new capacity to be made available in 2026. Australia hosts 89 active rare earth exploration projects — more than the next four countries combined.

Behind these headline numbers, the physical reality of building a critical minerals mine is identical to building any other mine: clearing land, constructing roads, drilling, blasting, crushing, screening, stockpiling and transporting material. Every one of these activities generates dust. Every one is subject to the same workplace exposure standards, environmental authority conditions and community expectations that apply to established coal, iron ore and gold operations.

But critical minerals projects face additional pressures that make dust control more, not less, important. They are being built under intense public scrutiny, with social licence that is tied to the ‘clean energy’ narrative. They are located in communities that may never have hosted a mine before. They are processing materials — spodumene, monazite, xenotime, bastnäsite — with dust properties that differ from conventional commodities. And they are being assessed by investors, government funders and off-take partners who evaluate ESG performance as rigorously as they evaluate ore reserves.

This article covers the specific dust challenges of critical minerals operations, the lessons from projects that have encountered community opposition over dust, and the proven engineering solutions that deliver compliance while protecting the social licence that these projects depend on.

The Critical Minerals Dust Challenge: Same Physics, Higher Stakes

The dust generation mechanisms at a lithium mine or rare earth project are identical to those at any hard rock operation: drilling fractures rock and generates respirable dust, blasting creates dust clouds, crushing and screening liberate fine particles, haul roads generate traffic dust, and stockpiles erode under wind. What differs is the material being processed, the community context, and the consequences of getting it wrong.

Spodumene and silica. Hard rock lithium mining in Australia processes spodumene (LiAlSi₂O₆) — a lithium aluminium silicate mineral. The chemical formula tells the dust story: silicon dioxide (SiO₂) is a fundamental component of the ore. When spodumene is drilled, blasted, crushed and screened, the dust generated contains crystalline silica at concentrations that trigger the full suite of Chapter 8A obligations. Life cycle impact assessment research on Australian spodumene operations has identified fine particulate matter (PM2.5) as a significant environmental and health impact category, alongside GHG emissions.

Rare earth mineralogy. Rare earth ores — monazite, xenotime, bastnäsite — are hosted in pegmatite, carbonatite and heavy mineral sand deposits. Depending on the host rock, drilling and processing can generate dust containing silica (from pegmatite host rock), thorium and uranium (monazite contains naturally occurring radioactive material, or NORM), and fine rare earth oxide particles. The NORM content of monazite-bearing dust requires additional controls beyond standard respirable dust management, including radiation monitoring and specific waste handling procedures.

Nickel, cobalt and manganese. Battery metals mined from laterite and sulphide deposits generate dust with varying silica, nickel and cobalt content. Nickel laterite operations in Western Australia and Queensland process oxidised ores that are often friable and highly susceptible to dust generation during excavation and haulage. Cobalt, typically produced as a by-product of copper or nickel mining, adds another layer of environmental sensitivity due to the metal’s toxicity to aquatic ecosystems.

The Greenbushes Lesson: What Happens When Dust Control Fails the Community

The Greenbushes lithium mine in Western Australia — the world’s largest hard rock lithium mine, producing approximately 1.95 million tonnes of spodumene annually — provides a cautionary lesson in what happens when a critical minerals operation’s dust management fails to keep pace with its production growth.

As production expanded by 50% from 2023, dust from the operation increasingly affected the town of Greenbushes, located just 3 km from the mine. Residents reported that dust was covering houses, vehicles, gardens and the town’s primary school. Over 200 residents joined the Greenbushes Environmental Action Group. A petition gathered over 15,000 signatures calling for independent health monitoring and stricter regulatory enforcement. Residents deployed 20 portable air quality monitors in a citizen science programme to independently verify conditions. Crowdfunding was launched for legal action.

In December 2025, WA’s Department of Water and Environmental Regulation assessed the mine’s dust as presenting a ‘high’ potential risk to the environment and public health. DWER approved the use of additional dust suppressant sprinklers on crushed lithium-bearing rock at the third processing plant but noted that the proposed changes were ‘unlikely to significantly alter the risk associated with dust emissions.’ The regulator updated conditions to require proactive application of dust suppression whenever visible dust is observed.

The Greenbushes experience illustrates a dynamic that every new critical minerals project must navigate: rapid production growth in proximity to communities, processing a material that contains silica and generates fine respirable dust, under regulatory and public scrutiny that is amplified by the project’s association with the clean energy transition. The community’s expectation is that a project built to enable a cleaner future should not generate the environmental harm associated with the mining industry’s past. Dust control is where that expectation is met or broken.

Regulatory Framework: No Exemptions for Critical Minerals

The geopolitical urgency of critical minerals supply has not resulted in any relaxation of environmental or workplace health standards for these projects. The regulatory framework applies in full.

Chapter 8A crystalline silica provisions (effective 1 September 2024) apply to every workplace processing materials containing ≥1% silica. Spodumene lithium mining, rare earth hard rock mining, and most battery metals operations process materials well above this threshold. A silica risk control plan, accredited training and air monitoring reporting are mandatory.

Environmental authority conditions for new mining projects are increasingly prescriptive on dust management. Conditions typically require dust management plans, boundary monitoring, complaints management, progressive rehabilitation and financial assurance covering all environmental obligations including dust and erosion control.

EPBC Act referral is required for projects that may impact matters of national environmental significance — which includes many critical minerals projects located near threatened species habitat, Ramsar wetlands or World Heritage areas. The dust control approach is assessed as part of the environmental impact assessment.

ESG and investor scrutiny. Critical minerals projects funded by government loans, sovereign wealth funds or ESG-screened institutional investors face an additional layer of accountability. Environmental performance — including air quality management and community impact — is reported, audited and assessed as a condition of continued funding. A dust incident that makes headlines does not just risk a regulatory fine; it risks the investment framework that the project depends on.

Engineering Solutions: The Complete Dust Control Approach for Critical Minerals Projects

Critical minerals project: dust source to product mapping

The product suite is identical to what GRT deploys across established iron ore, coal and gold operations. The difference for critical minerals projects is not the technology — it is the imperative. A critical minerals project that generates the same community and environmental complaints as the Greenbushes experience risks not just a regulatory response but a reputational event that affects government funding decisions, off-take partner confidence and future project approvals in the same jurisdiction.

For projects in the planning and construction phase, incorporating dust control engineering into the project design from the outset — rather than retrofitting it after the first community complaint — is materially cheaper and infinitely more effective. GRT: Haul-Loc and GRT7000 can be specified into the construction road design. GRT: Activate can be built into the processing plant commissioning plan. GRT: Enviro-Binder can be specified in the erosion and sediment control plan from the first clearing activity. Designed in, not bolted on.

The Construction Phase: Where Social Licence Is Won or Lost

For communities that have never hosted a mine, the construction phase is their first experience of what mining looks like. If that experience is dust plumes, sediment in the local creek and heavy truck traffic on unsealed roads, the social licence deficit may never be recovered — regardless of how the operation performs once production commences.

Critical minerals construction typically involves 12–24 months of intensive earthworks: clearing hundreds of hectares, constructing haul and access roads, building processing plant pads and foundations, excavating pits, constructing tailings storage facilities and installing water management infrastructure. Every activity generates dust on a scale that surrounding communities have never experienced.

The construction phase is also when the regulatory relationship is established. An operation that demonstrates effective dust and erosion control during construction builds credibility with the regulator. An operation that generates complaints during construction is flagged for closer scrutiny during operations — scrutiny that increases cost, delays approvals and constrains future expansion.

Proactive dust control during construction is not a compliance cost. It is an investment in the regulatory and community relationship that determines the project’s long-term operating freedom. The cost of implementing comprehensive dust control from day one of construction is a fraction of the cost of managing the complaints, investigations, conditions and potential legal action that follow a dust incident in a community that was promised a clean energy future.

Clean Energy Demands Clean Operations

The critical minerals industry carries a narrative burden that coal and iron ore never did. These projects are justified to communities, regulators and investors as essential to the clean energy transition. They are the mines that will power electric vehicles, battery storage, wind turbines and the decarbonised economy. That narrative creates an obligation: the operation must be as clean as the purpose it serves.

Dust control is where that obligation becomes visible. A lithium mine that covers a primary school in spodumene dust has failed the narrative. A rare earth project that generates sediment discharge into a protected waterway has failed the narrative. A battery metals operation that reports silicosis cases among its workforce has failed the narrative.

The engineering solutions to prevent every one of these outcomes are available, proven, and deployed across hundreds of mining and construction sites in Australia. GRT provides the complete product range — from haul road suppression and soil stabilisation through processing plant activation, erosion control and water treatment — with the engineering support to integrate them into project design from the earliest planning stage.

For critical minerals project managers, environmental managers and community relations teams responsible for delivering these nationally significant projects, the imperative is clear: design dust control into the project, not around the first complaint.

Sources and References

Dept of Industry, Science and Resources: Resources and Energy Major Projects Report (October 2025) — 432 projects under development, 72 new, AU$11B completed

CSIS: Unpacking the US-Australia Critical Minerals Framework Agreement — 89 active rare earth exploration projects, $64M investment

ScienceDirect: Extreme Derisking of Australian Rare Earth Projects — A$3.37B government loans, 15 rare earth mines/refineries mapped

Allens: Critical Minerals in 2026: The Rise of Rare Earths and Lessons from Lithium

Discovery Alert: Greenbushes Residents Battle Talison Lithium Over Health Concerns — 200+ residents, 15,000 signatures, citizen air monitoring

CB Insights / DWER: Dust Risk at Greenbushes ‘High’ According to DWER — December 2025, proactive suppression ordered

ScienceDirect / IOP: Environmental Impact Assessment of α-Spodumene Production — PM2.5, GWP, toxicity from Australian hard rock lithium

Farmonaut: Lithium Mining Environmental Effects: 7 Key Impacts 2026 — silica dust, crop yield loss 5–30%, water contamination

Safe Work Australia: Stronger Regulation of Crystalline Silica Substances — Chapter 8A

GRT: GRT: Haul-Loc

GRT: GRT7000

GRT: Dust Suppression Solutions — Activate, product range

GRT: GRT: Enviro-Binder

GRT: GRT: CC — water treatment