Method for detecting silica in carbide slag

• Main Authors: ZHAN LIJUN, WANG YANQIU, ZHOU XIN, LIU GANGYAO, LIU JIANHUA
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2016
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to the technical field of metallurgical analysis, and concretely provides a method for detecting silica in carbide slag. The detection method comprises the following steps: 1, dissolving a sample to be detected in hydrochloric acid, and filtering the sample and hydrochloric acid to obtain a precipitate and a filtrate; 2, mixing the precipitate with a mixed flux in a crucible, carrying out high temperature fusion at 900-950DEG C for 15-20min, and cooling the fused product, wherein the mixed flux comprises sodium carbonate and boric acid according to a weight ratio of (1.5-3.5):1; 3, adding the cooled product in the crucible to the filtrate, carrying out heating leaching, adding an ammonium molybdate solution to the above obtained leachate, and sequentially adding an oxalic acid-sulfuric acid mixed solution and an ammonium ferrous sulfate solution to obtain a detection solution; and 4, detecting the absorbance in the wavelength of 680nm or 810nm by adopting spectrophotometry, and obtaining