Tests on Ball Clay in Ceramic Factory
Aug 11, 2022
Tests on Ball Clay
The tests that were conducted in a lab using ball clay as a raw material in the manufacturing process are listed below. To ensure that the results of the testing are reliable, samples will be collected from various locations within the clay jump.
Clean ball clay for laboratory testing
Moistness Test
Alkali Demand Test, second
Remaining Test 3.
Shrinkage test, #4
5. Test of LOI
6. A test of water absorption
MOR Test 7.
Casting Rate 8.
Test for Moisture: This test is performed to determine the amount of moisture in the received ball clay load supply. Percentage of moisture is calculated using the formula Moisture% = ((W1 - W2)/W1)*100.
Where W1 represents the starting weight (100 g), and W2 represents the final weight after the sample has dried
Test for alkali demand. This test is run to determine the sodium silicate solution needed to get ball clay slide with less than 20 this. Alkali demand is calculated using the formula Alkali Demand% = ((Z/2)/W1)*100, where Z is the weight of clay added initially and W1 is the weight of sodium silicate solution added in grams.
Residue Test: This test is done to determine how much clay on a 200 mesh screen has residue in it. The equation used to determine the percentage of residual in clay
Residue% is calculated as Residue% = W1/((Density x 100) - 100 x 1.625) x 100), where W1 is the weight of the residue.
Shrinkage Test: This test is used to determine how much ball clay shrinks when dried, fired, and unfired.
The dried shrinkage is calculated using the formula dried shrinkage% = (L1-L2)/L1 x 100.
The calculation for determining friend shrinkage is.
Fired shrinkage% = (L2-L3)/L3 x 100.
Total shrinkage is calculated using the formula Total shrinkage% = Dried shrinkage% + Fried shrinkage%, where L1 is the length of the sample bar when it is first cast, L2 is the length of the sample bar after it has dried, and L3 is the length of the sample bar after it has been fired.
Test of LOI:
This test is used to determine the loss of clay ignition. The loss of ignition is the loss of weight during fire. The LOI is calculated using the formula LOI% = (W1-W2)/W1 x 100.
W2 is the sample's weight after being fired from the kiln, as opposed to W1, which is the sample's original weight.
Test for Water Absorption: The formula for calculating the percentage of water absorption is Water absorption% = [W2-W1] x 100/ W1.
W2 is the ultimate weight of the sample after being submerged in the boiling water, as opposed to W1, which is the original dried sample weight.
MOR Test in Green:
This test is designed to determine the ball clay's green modulus of rupture. Ball clay green MOR testing machine, MOR = 8 x P x L / [ x D3], is the formula used to determine the Green MOR.
L is the length in cm;
D is the bar's diameter in centimeters.
Casting Rate: To determine the hourly slip casting rate. By adding sodium silicate to ball slip with a 1.8 density, less than 20 Thixo slip can be produced. This ball clay slip is poured into a plaster mold and allowed to sit for an hour before being drained, dried, and measured using a vernier scale to determine the casting rate.
More tests on sanitaryware goods can be found here.
