ore

excavate an ore-rich hillside.

mining iron ore locally

The ore assays high in gold.

process ore to obtain minerals.

the technology for the extraction of iron ore

most iron ore had to be imported from Spain.

the Ural mountains, whence the ore is procured.

Jaspilite and altered phyllite are the main ore types.

teemed the molten ore into a huge mold.

A new ore-dressing plant is rapidly going up.

analyze an ore to see if it contains iron;

The author introducd the electric equipment design of ore smelting eutecticum engineering of ore sintering plate, stated the problemes and the countermeasures.

Through researches on porphyre rock body, alteration zoning and ore indicators and the ore-searching model are established in the area.

apron feeders bring coarse ore to a grinding mill.

black copper ore is generally griddled out .

The ore-bearing rock is composed mainly of andesitic tuff and tuffite.

Experiment is done on the acid hydrolysis of titanium-columbite-tantalite ore difficult to decompose.

Ore bearing stratum contain richly pyrrhotite,pyrite,spessartine and dannemorite.

Piedmont potassic alteration zone is the product of potsash feldspathization, part of the zone is ore body.