Sentence examples for ores were used from inspiring English sources

Small pieces of iron would have been produced in copper smelting furnaces as iron oxide fluxes and iron-bearing copper sulfide ores were used.

Local bog ores were used for that purpose.

Zinc ores were used to make the zinc copper alloy brass many centuries prior to the discovery of zinc as a separate element.

The second largest iron production center functioned at that time in Masovia, west of Warsaw, with the total number of furnaces there, in which only turf ores were used, estimated at up to 200,000.

To compare the effectiveness of the new HVEPC in crushing with the conventional crushers, several rock samples of a phosphate ore were used and the effect of the capacitor, the voltage level and voltage rise time on the phosphate ore breakage was investigated.

Natural hematite ore is used as a novel photocatalyst for visible photocatalyst and also for advanced fuel cell applications.

Therefore, 5 g/L iron ore was used as a minimum dose for maximum adsorption of 10 mg/L fluoride.

Literature mention that "Manganese of Piemont" (manganese ore) was used to produce a lead glass of golden colour [17, 18, 24, 25], and smalt (cobalt glass) and "calcined tin" (SnO2) for a glass of the colour of lapis lazuli [17, 18, 26, 27] and manganese ore and "zaffre" (CoO) for a sapphire glass [18].

The movement of raw materials is a useful guide to future economic growth because the raw materials are the building blocks for the world economy; coal is used to generate power, iron ore is used to make steel for housing and construction, and copper is needed for electrical wiring and plumbing.

Despite its isolation, the town experienced some population growth in the 1930s when high-grade iron ore was discovered and mined nearby and, again, in the 1940s when the ore was used to support the war effort (O Boland, unpublished document).

The mine employed 200 people in 1906; the ore was used as a strengthening agent for steel.