Method for quickly determining chemical reaction activity of quick lime
A chemical reaction and rapid determination technology, applied in the direction of material thermal development, can solve the problems of low reproducibility and effectiveness, poor accuracy, etc., to achieve the effect of simple operation, high accuracy and high repeatability
Active Publication Date: 2016-03-30
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 determining the chemical reaction activity of quick lime. The method includes the following steps that the quick lime to be determined is crushed and screened, and the screened powdery quick lime to be determined is arranged in a dryer for standby application; distilled water with the volume L is injected into a thermal insulation vacuum cup, a stirrer is started to stir the liquid in the cup, a thermometer is inserted into the vacuum cup to detect the liquid temperature, and the initial liquid temperature at the moment is recorded as T0; G parts of the powdery quick lime to be determined by weight is taken and poured into the thermal insulation vacuum cup to react with the distilled water, meanwhile a cup lid of the thermal insulation vacuum cup is closed to begin to perform timing, and the liquid temperature Tn is recorded for one time at equal time intervals; after n temperature data are continuously recorded, recorded values are entered into a computer to draw a temperature-time curve chart; activity degree data are calculated based on the obtained temperature-time curve chart. The method has the advantages of being accurate, effective and simple and convenient 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 detecting the activity of quicklime, among which YB / T105-2014 "Metallurgical Lime Physical Test Method" uses the acid-base titration method. The definition of activity in this method is: the reaction rate of l...
Claims
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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