Taxonomy — Feed Families & Product Forms

Iron Ore Types

The form of iron ore decides which specification fields govern and what has to be proven before a plant will accept it. The mistake is to read the form as a grade — the two are separate, and a lot can be exactly what its name says and still be wrong for your route.

Sort by the decision each page settles rather than by name. If you are unsure which one you need, the sorter below takes what you have and what it must do and names the family that matches — plus the evidence still outstanding.

Price on request. No grade, analysis or availability is stated on this page — each form is qualified against its own certificate.

Form-path sorter

Which form does your requirement actually point to

State what you have, what it has to do, and what evidence you hold. The sorter names the feed family that matches the route and reports what is still outstanding. It supplies no grade, size range or limit of its own.

The physical state of the material — this is material identity, not a grade.

The route the material serves. This is process suitability, which is a separate question from what the material is.

A figure without the method and sampling standard behind it cannot be compared with another offer.

Nothing selected yet

No form family is named because nothing has been stated. The most useful starting pair is what you have and what it must do — material identity and process suitability are different questions, and a form that satisfies one can fail the other.

Method and limits

  • The sorter maps your two statements onto the form families described on this site. It supplies no grade, size range, gangue limit or moisture figure.
  • It reports what is outstanding, never whether material will be accepted — the receiving plant's route decides that.
  • No stock, price, lead time or availability is estimated from anything entered here.

The ore forms

Grouped by the decision each one settles

These pages are not interchangeable and are not alternatives to one another. Each answers a different question about the material, so open the one that matches what you still need to establish.

What has already been processed

These forms carry a deliberate processing step before sale. That changes what the analysis describes — it reflects the process as well as the deposit — and it changes what has to be documented.

What feeds an agglomeration route

These are bought as feedstock into a plant that will shape them. They are judged on what the route asks of them, and the two agglomeration paths impose different requirements on material of broadly similar size.

What the plant produces

This is a product of a process rather than an input to one. It is judged on physical quality as much as chemistry, and it is not interchangeable with the feedstock it is made from.

How to choose

Material identity and process suitability are separate questions

Most form-choice errors come from answering the first question and assuming it settles the second. These are the criteria that actually move the choice.

The criteria that change which iron ore form a requirement points to, the question each one answers, and where it is established.
CriterionThe question it answersWhere it is established
Physical stateIs the material coarse, fine, ground, beneficiated or shaped?Stated by the buyer from what is actually held.
Natural vs processedHas anything been done to it before sale?Determines whether the analysis reflects the deposit alone or a processing step too.
Intended process routeDirect charge, sinter strand, balling circuit or reduction?Named by the buyer — no type name carries it.
Governing chemistryWhich elements does the route control, and at what limits?Buyer-defined per element, each with its analytical method.
Size and its basisDoes the sizing suit the route's intake?The sizing record with the method and sieve series that produced it.
Mass and moisture basisIs the tonnage quoted wet or dry?The moisture figure, compared against offers on the same basis.
Commercial routeIs the material consumed on site or held and resold?The buyer's own position, which changes what has to be documented.

The substitution trap: naming a neighbouring form in a quotation does not make the two interchangeable. If an offer swaps one for another, treat it as a different requirement — what has to be established changes with the form.

Iron ore sample trays arranged side by side to compare natural, sized and prepared forms.
Form is what has been done to the material. Grade is its chemistry. They are established separately.
Screening equipment classifying iron ore into size fractions during sample preparation.
A sizing record is only comparable when the method that produced it travels with it.

Buying process

From form choice to delivery

A compact route showing what happens between identifying the form family and the handover — each stage tied to a real concern rather than a generic claim.

01

Form identified

What the material actually is, which is material identity rather than a grade.

02

Route named

The process it has to serve, which decides which properties govern.

03

Bases fixed

Method, moisture basis and sizing method travel with every figure quoted.

04

Evidence checked

Open items are carried into the enquiry rather than discovered after the order.

Buyer concerns on an ore form enquiry, how each is addressed, and the evidence required.
Buyer concernHow it is addressedEvidence required
Form mistaken for a gradeThe enquiry separates what the material is from what it contains.An assay with its analytical method, distinct from the form name.
Agglomeration routes assumed equivalentSinter feed and pellet feed are treated as different requirements, not variants.The intended agglomeration route, stated explicitly.
Tonnage quoted on an unstated basisEach offer must state whether the tonnage is wet or dry.A moisture figure with its mass basis.
Sizing quoted without its methodThe sizing record is required to name the sieve series and method.A size distribution with the method that produced it.
Substitution presented as a variationA swapped form is treated as a different requirement with its own evidence.Written confirmation of the form actually offered.

Buyer FAQ

Questions that come up before a form is chosen

These are the questions buyers and procurement teams raise while narrowing an ore requirement to a feed family — not definitions, which the sections above already cover.

Is a form name the same as a grade?
No. A form name describes what has been done to the material — whether it is coarse, fine, ground or shaped. A grade describes its chemistry. The two are established separately, and a lot can carry the right form name and still miss your grade requirement.
Can sinter feed and pellet feed be used interchangeably?
Not reliably. Both are fine iron ore sold as feed, but the two routes ask different things of the material. Sintering bonds a mix on a strand where it partially melts; pelletising balls material that then has to survive induration. A feed sized for one route may be the wrong fineness or the wrong gangue ratio for the other, so a substitution is a different requirement rather than a variation.
What has to be settled before two ore offers can be compared?
Every figure needs the basis it was determined on. The iron content needs its analytical method and edition; moisture needs to say whether the tonnage is quoted wet or dry; the size distribution needs the method and sieve series that produced it; and each gangue and deleterious element should be stated separately rather than as a combined figure. Where two offers differ on any of those, their numbers describe different things even when they look similar.
How do I know which type page answers my question?
By the decision you still have open rather than by the material's name. Each type page settles a different question — what arrives unprocessed, what has already been processed, what feeds an agglomeration route, and what a plant produces. Open the one whose question is unresolved; the others will not answer it.
Does a higher iron figure always mean a better ore?
No. Iron content is one requirement among several, and it is not the one that decides whether a feed suits a route. Fineness, the ratio between gangue components, the elements your process controls and the behaviour of the material through the process all bear on the outcome. A feed with a strong iron figure but the wrong profile for the route can underperform one with a lower figure that suits the plant.

Request a Quote

Once the form family is settled, the specification fields that matter follow from it. Send the specification with the form and the route stated, and the commercial desk responds against the scope you set rather than a type name.

  • Form and intended route stated together
  • Each figure carrying its method and basis
  • Open items carried into the enquiry rather than found later

Price on request. Availability and documents are confirmed for the exact consignment before any offer is made.

Carry the record into an enquiry

Copy the form-path record and attach it, or state the fields directly. Nothing is pre-filled.

Complete the sorter above to generate a record you can attach.