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The slag ball content analysis instrument is designed according to the standard of GB/T5480.5-2004 mineral wool and its product test method, and can be used for glass wool and its products, slag wool, rock wool, and its products, silicon. The acid aluminum wool and its products were analyzed for slag ball content. It has the characteristics of small size, beautiful appearance and practicality, and is an essential instrument for the laboratory.
Instrument standard specification
According to GB/T5480.5-2004 mineral wool and its products test method standard design of slag ball content
use
The slag ball content can be analyzed for glass wool and its products, slag wool, rock wool, its products, aluminum silicate cotton and its products. It has the characteristics of small size, beautiful appearance and practicality, and is an essential instrument for the laboratory.
Calculation method
The slag content sh is calculated as follows:
Sh=m/moX100
In the formula:
Sh—the content of the slag ball, the unit is the percentage (%);
m—The mass of the slag ball, in grams (g).
M0 - mass of the sample in grams (g).
Steps for usage
Preparation sample
According to the provisions of GB/T5480.5-2004, select the sample and cut about 11g of the full thickness sample. For glass wool and its products, it is burned at (500 ± 20) °C for more than 30min; for silicic acid cotton and its products, it is burned at (700 ± 20) °C for more than 30min. Remove the binder and weigh it to the nearest 0.01g. The number of samples shall be as specified in the product standard, but shall not be less than three.
Press sample
The weighed sample is placed in the corresponding sample cylinder and placed on the press for manual screw pressurization.
Wetting sample
The pressed sample was taken out, placed in a 250 mL measuring cup, 50 mL of a surfactant solution was added, and stirred well to allow the fibers to be wetted and dispersed in the solution.
Separation test
Move all of the sample into the separation barrel.
The water source switch was turned on so that the flow rate of the rotameter was 60 mL/min, and the flow rate was maintained until the fibers were dispersed and suspended in the water.
Increase the water flow to (120-180) mL/min and continue to separate for about 10 minutes.
After the water in the separation cylinder is clarified, the slag discharge valve at the lower end of the separation cylinder is opened, and the slag ball is completely discharged into the standard sieve whose side length is not longer than the side length of the sieve hole specified by the product standard by means of the water flow.
Check if the fibers in the fiber collector contain slag balls. If there are slag balls, they should be placed in the separator for separation.
dry
The sieve containing the slag ball is placed in an electric drying oven and dried at a temperature of (105-110) ° C for at least 20 minutes.
Screening
The dried slag balls were transferred into a standard sieve of the sieve holes specified in the product standard, and three ceramic balls of diameter (20 ± 1) mm were added, and after being covered, the sieve was started and sieved for 15 minutes.
Weighing
The sieved slag balls were weighed on a balance and the readings were accurate to 0.01 g.
Calculation and test results
Calculation
The slag content sh is calculated as follows:
Sh=m/moX100
In the formula:
Sh—the content of the slag ball, the unit is the percentage (%);
m—The mass of the slag ball, in grams (g).
M0 - mass of the sample in grams (g).
test results
The test results are expressed as an arithmetic mean, accurate to the first decimal place.
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