Method for determination of antimony content in smelting slag

Abstract

The present invention discloses a method for determination of the antimony content in a smelting slag, which comprises the following steps: (1) weighing a certain amount of a slag sample, and placing in a conical flask; (2) adding a certain amount of potassium sulfate, potassium fluoride dehydrate, and a sulfuric acid solution to dissolve the sample, and then heating the test sample on an electric hot plate for decomposition; and after most of the sulfur is expelled, covering by a watch glass, and further heating on the electric hot plate, so that the sample was dissolved completely; (3) taking down the test sample and cooling a little, adding a certain amount of hydrazine sulfate and heating continuedly for 10-15 minutes; (4) taking down and cooling the test sample; adding a certain amount of water, and hydrochloric acid, mixing uniformly; adding a certain amount of phosphoric acid, and mixing uniformly in on the electric hot plate for continue heating, temperature controlled at 80 DEG C to 90 DEG C; (5) taking down the test sample, adding a little methylene blue and a little methyl orange, mixing as an indicator; titrating with the cerium sulfate standard solution; and calculating the content of antimony ions according to the consumption of the cerium sulfate standard solution. By using the method, the result is easy to judge, and the determination is rapid and accurate.

Description

Technical field [0001] The invention relates to a method for analyzing the content of antimony, in particular to a method for determining the content of antimony in smelting slag. Background technique [0002] The enterprise standard method for analyzing antimony is: weigh a certain amount of slag sample into an Erlenmeyer flask, add a certain amount of potassium sulfate, potassium fluoride dihydrate and concentrated sulfuric acid, and place it on a hot plate to heat and decompose, and most of it will be removed After sulfur, cover with a watch glass, keep the solution slightly boiling and dissolve on the electric hot plate, shake 2 to 3 times during this period, take off the sample and cool it slightly, add a certain amount of hydrazine sulfate, continue heating, remove the sample to cool, and add A certain amount of water, hydrochloric acid (1+1), mix well, add a certain amount of phosphoric acid, mix well, heat 80~90℃ on an electric hot plate, remove the sample, add 2 drops of...

AI Technical Summary

Problems solved by technology

When the above method is used to analyze the content of antimony in smelting slag, due to the high content of iron ions in smelting slag, the titration is seriously interfered, even if phosphoric acid is added during the analysis process, it will not have much masking effect, and the end point of antimony titration will not be obvious, making it difficult to judge. Lead to inaccurate analysis results and easily mislead production

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