GB/T 5480—2017standardMineral cotton slag ball content analyzer

principle

By utilizing the difference in gravity and resistance experienced by slag balls and fibers during their movement in an aqueous medium, the slag balls and fibers are separated, and the content of slag balls in mineral wool is measured through drying, screening, and weighing. 9.2 Instruments and Equipment

Separation device: including0L/h～180L/hGlass rotor flowmeter with an inner diameter of80 mmThe total height is380 mmSeparation cylinder, plastic water tank, fiber collector, and slag ball collector, etc. See figure 7.

1： The standard design and production of slag ball content for mineral wool and its products can be used to analyze the slag ball content of glass wool and its products, slag wool, rock wool and its products, and aluminum silicate wool and its products. It has the characteristics of small size, beautiful and practical appearance, and is a laboratory instrument

2、 Slag ball content analyzerTechnical Specifications

1Glass rotor flowmeter:0L/h～180L/h
2Separation cylinder: inner diameter80mmhigh380mm
3Fiber Collector:138x98mm
4Slag ball collector:138x98mm
5Plastic sink:210x140mm
6Slag ball content analyzerOverall dimensions:390x185x570mm

pressGB/T 5480—2017Select the sample according to the regulations and cut the full thickness specimen11gabout. For glass wool and its products, in（500±20）℃Lower burn30minabove; For silica wool and its products, in（700±20）℃Lower burn30minThe above. Remove all adhesive and weigh accurately0.01gThe number of samples shall be in accordance with the product standards, but shall not be less than3One.

• Pressing the sample

Put the weighed sample into the corresponding sample cylinder and place it on the press for manual screw pressure.

• Wet sample

Take out the compressed sample and place it in250mLAdd surfactant solution into the measuring cup50mLAnd stir thoroughly to wet and disperse the fibers in the solution.

• Separation test

Transfer all samples into the separation cylinder.
Turn on the water source switch to set the flow reading of the rotor flowmeter to60mL/minMaintain this flow rate until the fibers are dispersed and suspended in water.
Increase water flow to（120-180）mL/minContinue to separate10min左右。
After the water in the separation cylinder is clarified, open the slag discharge valve at the lower end of the separation cylinder and use water flow to discharge the slag balls into a standard sieve with a side length not greater than the side length specified by the product standard.
Check whether the fibers in the fiber collector contain slag balls. If there are slag balls, they should be placed in the separator for separation.

• dry

Place the sieve containing slag balls into an electric drying oven, and then（105-110）℃Dry at least at a certain temperature20min.

• screening

Transfer the dried slag balls into the standard sieve with the specified mesh size in the product standard, and add3Only with a diameter of（20±1）mmThe ceramic ball, after being covered, starts the vibrating screen machine for screening15min.

• weighing

Place the screened slag balls on a balance and weigh them accurately0.01g.

• Calculation and experimental results

calculate
Slag ball contentsｈ-Calculate according to the following formula:
Sh=m/moX100
Where:
sｈ—Slag ball content, unit: percentage (%);
m—Mass of slag ball, in grams（g）.
m0-Sample mass, in grams（g）.