Test method for carbon dioxide in active lime, and apparatus

Abstract

The present invention relates to a test method for carbon dioxide in active lime, and an apparatus. The apparatus comprises: a spiral lifting bracket, a furnace, a base, a quality control box, a power supply regulator, a weighing display instrument, a temperature controller and a temperature sensor, wherein an electronic balance is arranged in the quality control box, the electronic balance and the weighing display instrument form a circuit connection, a crucible support rod penetrates through a through hole and extends into the furnace hearth of the furnace, and the top end of the crucible support rod is provided with a crucible tray. The test steps comprise: (1) calibrating the electronic balance; (2) placing 1 g of a lime sample into the crucible, and recording the stable-state mass m1; (3) heating to a temperature of 150 DEG C, maintaining the temperature for 1 h, and recording the mass m2; (4) heating to a temperature of 750 DEG C, maintaining the temperature for 1 h, and recording the mass m3; (5) heating to a temperature of 1050 DEG C, carrying out constant temperature calcination for 1 h, and recording the mass m4; and (6) calculating contents of carbon dioxide, impurities and water. According to the present invention, the automated operation of the active lime carbon dioxide test is achieved, the human error is avoided, and the accuracy of the measurement result is improved.

Description

technical field [0001] The invention belongs to the technical field of performance testing of chemical materials, and relates to the quality and performance testing of active lime, in particular to a method and device for testing carbon dioxide in active lime. Background technique [0002] Active lime as a "slagging agent" not only affects the smelting process of molten steel, but also directly affects the quality of molten steel. Active lime replaces ordinary lime as a slagging agent, which can speed up smelting slagging, reduce lime consumption per ton of steel, and reduce impurities. Bringing in and improving the quality of molten steel has brought significant economic benefits to the enterprise. [0003] An important index to evaluate the quality of active lime is the raw overburning rate of lime. Raw burning means that the limestone raw material is not completely decomposed, and some calcium carbonate remains; overburning means that the limestone is over-calcined, the ...

AI Technical Summary

Problems solved by technology

The process of this method is cumbersome, the control is difficult, and errors and errors are prone to occur during the test process.

The disadvantages of the above two methods are: (1) Manual operation is prone to human errors and errors; (2) The mass of active lime is exposed to the air before it is measured, which will easily cause moisture absorption of lime, resulting in an increase in the actual measurement quality and affecting the measurement. Accuracy of results; (3) Cannot respond to changes in quality in time; (4) Poor test repeatability

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