Sentence examples for lead concentrates from inspiring English sources

Lead concentrates shipped from the concentration mill to the smelter contain 40 to 80 percent or more lead, with varying amounts of impurities, of which sulfur (up to 30 percent) and zinc (up to 15 percent) are most common.

Chinese smelters are becoming dependent on imported lead concentrates to meet targets, and world supplies are tight.

Crude ore is milled in the city; lead concentrates are then shipped to Port Pirie (South Australia) for refining.

Sintered zinc and lead concentrates, mixed with metallurgical coke, are charged into the top of a shaft furnace, into which preheated air is blown through nozzles, or tuyeres, at the base (see figure).

The QSL, or Queneau-Schuhmann-Lurgi, process treats all grades of lead concentrates, including chemically complex secondary minerals, in a refractory-lined reactor into which oxygen and natural gas are blown through tuyeres at the bottom.

Following the agencies' guidelines, the company that owns the mine, Lead Concentrates, has dredged part of the contaminated sediment but hasn't taken any action comprehensive to restore the creek.

His daughter Penelope (Joanne Howarth) has followed his lead, concentrating on her hobbies.

Glencore also agreed to supply Chinese companies with a minimum amount of copper, zinc and lead concentrate through the end of the decade to ease concerns that China might face shortages metals needed for its local economy.

Before lead concentrate can be charged into traditional blast furnaces for smelting, it must be roasted to remove most of the sulfur and to agglomerate further the fine flotation products so that they will not be blown out of the blast furnace.

Waelz oxide is a zinc and lead concentrate pyrometallurgically derived from electric arc furnace dust.

A second converter showed substantial loss of NO activity alone which was traced to high levels of lead, concentrated towards the front but significant throughout.