Method for measuring content of calcium in anthracite

A technology of anthracite, calcium content, applied in the field of chemical industry

Inactive Publication Date: 2018-03-16
YUNNAN METALLURGICAL XINLI TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for measuring content of calcium in anthracite

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Embodiment 1

[0049] (1) Take the anthracite sample 1 to be tested, the anthracite sample 2 to be tested, the anthracite sample 3 to be tested and the anthracite sample 4 to be tested and pulverize completely respectively, and pass through a 200-mesh sieve respectively to obtain anthracite powder 1, anthracite powder 2, and anthracite powder 3 and anthracite powder 4; weigh 0.1 g of anthracite powder 1 in a platinum crucible, and add 0.9 g of anhydrous sodium carbonate and 0.3 g of sodium tetraborate and mix; place the platinum crucible in a muffle furnace and keep it warm at 890-920 degrees Celsius 15 minutes; use 30mL of boiling hydrochloric acid with a mass concentration of 20% to transfer the molten product to a polytetrafluoroethylene beaker for leaching treatment, and clean the platinum crucible to obtain the leaching solution, place the leaching solution for ventilation until it is clear, and then transfer to a 100mL capacity In the bottle, dilute to the volume with ultrapure water to ob

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Abstract

The invention discloses a method for determining the calcium content in anthracite coal, which comprises: (1) grinding the anthracite sample to be tested to obtain anthracite powder; (2) mixing the anthracite powder with anhydrous sodium carbonate and sodium tetraborate according to a predetermined ratio , so as to obtain the mixture; (3) the mixture is placed in a platinum crucible and melted in a muffle furnace to obtain a molten product; (4) the molten product is transferred to a beaker with boiling hydrochloric acid for leaching to obtain (5) transfer the leaching solution to a volumetric flask for constant volume, so as to obtain the sample to be tested; (6) prepare the calcium working curve standard solution of a series of concentrations; Calcium working curve standard solution is used for detection, and the calcium content in anthracite is calculated according to the standard curve drawn from the detection results. The method is simple and easy to implement, and the calcium content in the anthracite can be quickly and accurately determined by using the method.

Description

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Claims

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Application Information

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Owner YUNNAN METALLURGICAL XINLI TITANIUM IND CO LTD
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