Increased 1971 demand for boron minerals and compounds, particularly in the glass and enamel industries resulted in sustained high output. For some time all U.S. output had been in the form of sodium borates and boric acid. In mid-1971, however, production of calcium borate (colemanite) on a commercial scale was resumed. The United States is by far the largest world producer of boron minerals. About half of U.S. output is normally exported, divided nearly equally in terms of boron content between semifinished boron compounds and refined compounds, with only the latter reported in official trade returns. During 1971, recorded exports declined considerably as compared with the previous 2 years. The paper further delineates the expected production, trade, consumption, and price outlooks.
Eng. and Min. J., V. 173, No. 3, March 1972, PP. 146-147