A rapid method for determining the chemical reactivity of quicklime
A chemical reaction and rapid determination technology, applied in the direction of thermal development of materials, can solve the problems of low reproducibility and effectiveness, poor accuracy, etc., and achieve the effect of simple operation, high accuracy, simple and fast operation
Active Publication Date: 2018-03-09
浙江天石纳米科技股份有限公司
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Problems solved by technology
[0007] The technical problem to be solved by the present invention is that the existing calorific value detection method of quicklime has poor accuracy, low reproducibility and effectiveness, so as to provide an accurate, effective and easy-to-operate quick lime chemical reaction activity rapid determination method
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Embodiment
[0035] Take 3 different quicklime samples for activity test, which are marked as 1#, 2# and 3# respectively. The 3# sample has been exposed to the air for a long time and has reacted with the moisture in the air, so the activity is very low. The determination of each quicklime sample includes the following steps:
[0036] (1) Get a sufficient amount of unslaked lime and crush it with a jaw crusher, sieve it through a 100-mesh standard sampling sieve, and take about 200 g of the powdery passing material and store it in a sealed bag, and place it in a desiccator for subsequent use;
[0037] (2) Use a beaker to take 1000ml of distilled water and place it in a water bath, and keep the temperature at 43°C;
[0038] (3) Measure 400ml of distilled water obtained in step (2) and pour it into a thermos cup with a capacity of 500ml, turn on the agitator to stir the liquid in the thermos cup, set the stirring speed to 300r / min, and set the temperature of the electronic digital display th...
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The invention discloses a method for quickly measuring the chemical reactivity of quicklime, which comprises the following steps: breaking and sieving the quicklime to be tested, placing the sifted powdery quicklime to be tested in a desiccator for standby; taking distilled water with a capacity of L Pour into a heat-insulated thermos cup, start the agitator to stir the liquid in the cup, insert a thermometer into the thermos cup to detect the liquid temperature, and record the initial liquid temperature at this time as T0; Put it into the heat-insulated thermos cup to react with distilled water, cover the lid of the heat-insulated thermos cup at the same time, start timing, and record the liquid temperature Tn once at intervals of equidistant time; after continuously recording n temperature data, enter the recorded value into the computer and draw A temperature-time curve is formed; based on the obtained temperature-time curve, the activity data is calculated. The beneficial effects of the present invention are: accurate and effective, and easy to operate.
Description
technical field [0001] The invention belongs to the field of performance measurement of chemical materials, in particular to a rapid measurement method for the chemical reactivity of quicklime. Background technique [0002] Quicklime, whose main component is calcium oxide, is widely used in construction, alkali chemical industry, glass ceramics, pharmaceutical chemical industry, food industry, paint dye, papermaking, plastics and other fields. Quicklime is generally made by calcination of limestone, and the degree of calcination is usually measured by activity. The degree of activity reflects the digestion and reaction ability of quicklime and water. The more intense the reaction, the greater the degree of activity, and vice versa. [0003] There are many methods for testing the activity of quicklime, among which YB / T 105-2014 "Physical Testing Methods for Metallurgical Lime" uses the acid-base titration method. The definition of activity in this method is: the reaction ra...
Claims
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IPC IPC(8): G01N25/48
Inventor 周雪婷周新民王璟琳田伟
Owner 浙江天石纳米科技股份有限公司