The word 'refractory' is correct and usable in written English.
It is an adjective which means stubbornly resistant to authority, control, or change. For example, "The refractory child refused to obey his parents' instructions."
Brought in by Michelago, an Australian mining firm, the bacteria reproduce like mad while consuming the sulphur and arsenic present in refractory ore.
Refractory disagreement is a bedrock fact of liberal society.
They are relatively hard, dense, and refractory.
For example, with a lumpy, refractory ore and a slag containing approximately equal amounts of magnesia, alumina, and silica, a ferrochromium is produced that contains 4 to 6 percent carbon and less than 1.5 percent silicon.
This is called the absolute refractory period, and it is followed by a relative refractory period, during which another action potential can be generated, but only by a greater stimulus current than that originally needed.
In this process, the concentrate is mixed with hematite (an iron ore), aluminum powder, and small quantities of fluorspar and lime fluxes in a rotary mixer and then unloaded into steel containers lined with magnesite refractory bricks.
The aluminothermic process can also be carried out in a refractory-lined steel pot or water-cooled copper crucible.
In the aluminothermic process, V205, mixed with aluminum powder, is heated in an electric furnace or ignited in a refractory-lined vessel using barium peroxide as the booster.
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.
Similar to the blast furnace, the cupola is a refractory-lined steel stack 20 to 35 feet (6 to 11 metres) high, resting on a cast-iron base plate with four steel legs.
The metal is obtained by the Spedding process, in which powdered ThF4 is mixed with finely divided calcium (Ca) and a zinc halide (either zinc chloride or zinc fluoride) and placed in a sealed, refractory-lined "bomb".
