What a plant keeps buying after the machine arrives

A competition regulator has ruled on what an equipment supplier really sells, and the answer is not the equipment — which explains the shape of the whole supplier relationship.

Pending review

An aisle of heavy shelving loaded with spare wear parts — stacked rubber liners, framed screen panels on edge and nested spiral troughs. — Illustrative artwork: replacement wear parts in store of the kind consumed in mineral processing. Not a facility, equipment or material connected to this project. · Illustration · Osmond Hub

The short version

The clearest available statement of what an equipment supplier's business consists of comes not from the industry but from a competition authority. Examining a mining-equipment merger in 2020, the European Commission concluded that the aftermarket for each type of capital equipment it examined — grinding, flotation, filtration and iron ore pelletizing — 'constitutes a separate market from the supply of the respective mining capital equipment'(opens in a new tab). The machine and everything the machine subsequently needs are, in a regulator's analysis, two different products sold into two different markets — by, usually, the same supplier.

Three things that are not the same

That decision is useful because it defines terms an industry ordinarily uses loosely. Recording the parties' own taxonomy, the Commission set out that the aftermarket comprises spare parts, described as 'worn out/broken components that are not designed to be replaced regularly'; services, meaning 'labour to maintain and/or repair the equipment, including the installation of wear and spare parts'; and wear parts, 'parts that are subject to wear and tear, typically in direct contact with the feed material', designed to be replaced regularly(opens in a new tab).

The third category is the one that shapes the relationship. A wear part is not a failure; it is a consumable with a design life, and buying the machine is the act of committing to buy them. The Commission's finding that these constitute a separate market rested on evidence: a majority of competitors and customers responding to the market investigation confirmed that aftermarkets are separate from capital equipment supply 'due to limited substitutability in terms of service characteristics, technicians' skills, prices, and timing delivery'(opens in a new tab).

Why abrasive duty makes this sharper

Wear is a materials problem before it is a commercial one. It is the removal of material by the mechanical action of an abrasive(opens in a new tab), and whether it happens at all turns on a hardness comparison: one review of the mechanics states that an indenter will scratch a surface only if the hardness ratio Hi/Hw is at least 1.2(opens in a new tab), with mild and severe regimes distinguished by that same ratio.

Heavy mineral sands are an unhelpful feed by that measure. Quartz — the bulk of the sand a separation plant handles — sits at 7 on the Mohs scale(opens in a new tab), above feldspar and apatite and below only topaz, sapphire and diamond among the reference minerals. Abrasive wear alone has been estimated to cost 1–4% of the gross national product of industrialized nations(opens in a new tab), a figure that is economy-wide rather than specific to this industry and is quoted here as such. What share of a mineral-sands operating cost goes to wear parts is not a number this article has; it was looked for and not found.

The purchase is a one-off. The abrasion is continuous. The commercial relationship follows the abrasion, not the purchase.

Mature equipment, narrow expertise

The other structural feature is that the machinery is old. The processing route is unglamorous and long-established. An IAEA report on the zircon and zirconia industries describes heavy mineral sand deposits as typically containing 1–10% heavy minerals, processed by gravity separation to a concentrate containing more than 95% heavy minerals, after which zircon and the other minerals of value 'are separated from the complex mineral mix by magnetic and electrostatic separation processes'(opens in a new tab) — though that report's own scope clause states that the mining of heavy mineral sands and the processes by which the heavy minerals 'are concentrated and separated' are 'not included within the scope of this report, but a brief overview is provided in Annex I', so this is background the report carries rather than the subject it sets out to treat. Gravity, magnetism, electrostatics — three physical properties, exploited by machines whose principles have not changed in a long time. One industry account notes that gravity separation techniques 'have been in use in the mineral sands industry for decades'(opens in a new tab), and a conference paper on the magnetic side that magnetic separation 'has long been used to upgrade and beneficiate a wide variety of industrial minerals'(opens in a new tab).

Maturity narrows rather than widens the supplier field, because there is no technological churn to let new entrants in. The Commission's investigation found the supply side notably rigid: almost two thirds of suppliers considered that their companies would not be able easily to start offering a specific type of grinding equipment not yet offered, or to switch between different types of grinding mills, and that such a switch would take longer than two years(opens in a new tab). A buyer's practical choice is therefore narrower than a catalogue suggests.

What this article does not establish

Two absences worth naming rather than papering over. There is no sourced figure here for delivery lead times on major equipment, and none for how concentrated the supplier base is — the decision that would most obviously contain the latter redacts every market share it discusses.

And nothing here describes what a supplier's performance guarantee covers. That term has at least two meanings in official documents, and the one located under that name refers to a corporate parent's undertaking rather than to a plant's guaranteed throughput. Rather than blend them, this article leaves the point open: the guarantee is central to how plant is procured, and its content is not sourced here.

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