Start with the process, not a generic lime grade
The National Lime Association describes high-calcium and dolomitic quicklime as steelmaking fluxes used in basic oxygen furnaces, electric arc furnaces and secondary refining. They help form slag and remove impurities. The same overview stresses the importance of both chemical and physical properties: a product name alone does not establish fitness for a particular furnace.
For a purchasing discussion, identify the furnace or refining stage and ask the plant’s metallurgical team to define the acceptance criteria. Do not transfer another plant’s blend ratio, consumption rate or operating result into a new supply contract.
Keep calcium and magnesium requirements separate
Hong Ha’s burnt dolomite catalog lists CaO at a minimum of 52% and MgO at a minimum of 30%, with a 10–80 mm size reference and a listed 90% fraction. These are catalog references. They do not establish a universal steelmaking specification or prove that the material meets a particular refractory requirement.
Ask for the offered grade and relevant analysis, then compare each reported parameter against the plant’s limits. Agree what the size fraction means, how it will be tested and what oversize and fines are acceptable.
A practical brief for the technical team
- Application: furnace type, addition point and receiving or injection equipment.
- Chemistry: separate CaO and MgO requirements, assay basis and any impurity limits.
- Physical properties: size distribution, fines and any reactivity or density test required by the plant.
- Approval evidence: sample identification, analytical methods and agreed trial criteria.
Use a documented trial before repeat supply
Keep the trial’s technical results separate from commercial terms such as packing, shipment quantity and destination. A successful evaluation should record the material tested and the acceptance decision; it should not become an unsupported claim about every future batch.