金尾矿选矿试验中二氧化硅快速测定

Rapid Determination of Silicon Dioxide in the Ore Dressing Test of Gold Tailing

测定了选矿试验中大批量样品二氧化硅含量。用价格低廉的银坩埚取代昂贵的铂坩埚,可同时分析大批样品;用氢氧化钠熔样,温度相对碳酸钠要低很多,可节省时间;在两次盐酸蒸干重量法中,省去了氢氟酸挥发和钼蓝比色法分析滤液中剩余的微量二氧化硅两步。从与冶金堪探院测定结果对比和物料衡算结果上看,测定准确可靠,为选矿方案的制定提供了依据。

Silicon dioxide content of the multitudinous samples in the ore dressing test was assayed. Precious platinum pot was replaced by the inexpensive silver pot, and multitude samples could be analyzed at the same time; samples were melted by the sodium hydroxide, in which the temperature was much lower than that of the sodium carbonate, so much time could be saved; in the double evaporation to dryness of the hydrochloric acid, volatilization of the hydrofluoric acid and the analysis of the residual micro - silica in the filter liquor by the molybdenum blue colorimetry were abbreviated. In the contrast to the measured results of the metallurgic exploration institute and the results of the material balance, the assay was accurate and reliable, which could supply laws for the determination of the concentration scheme.