The loss on ignition test method has different regulations in the technical standards of different industries. For example, the test method for the loss on ignition of ash formed by combustion is as follows: accurately sample 0.5~1 which has been dried at 105~110 °C. Gram, placed in a constant weight platinum crucible, burned on an alcohol burner for 30 minutes, or moved into a high temperature electric furnace that has been heated to 300 ~ 400 ° C, after 10 to 15 minutes of burning, gradually warmed to 900 ~ 950 ° C Continue to burn for 1.5~2 hours, take out slightly cold, put in a desiccator and cool to room temperature and weigh.
Test method for loss on ignition of refractories
Loss on ignition (%) test sampling method and quantity:
Bulk ash sampling – Take 15 samples from different parts, 1~3kg per sample, mix evenly, and dilute the sample (called average sample) twice the amount required by the test according to the quadruple method.
Sampling of bagged ash – draw 10 bags from each batch, and take no less than 1kg from each bag, mix evenly, and dilute the sample twice the amount required by the test according to the quadruple method. For the average sample).
experiment method:
Sampling according to the quadruple method, accurately weigh 1g sample, placed in a porcelain crucible that has been burnt and constant weight, and place the lid obliquely on the crucible, and then gradually increase the temperature from the low temperature in the high temperature furnace, at 950~1000 After burning at °C for 15~20min, remove the crucible and place it in a desiccator to cool to room temperature. Weigh, so repeatedly burning until constant weight.
Calculation formula:
Loss on ignition (%) S=(G1-G2)/G1*100
G1 quality before burning, quality after G2 burning.
Method for purifying flue gas in garbage incinerator
The composition of flue gas and soot generated by waste incineration is different from that of coal-fired boilers. Although it varies with the original components of the waste, the total concentration of HCL in the flue gas is the highest, generally up to about 1000mg/Nm3. The content of SO2 is lower than that of a coal-fired boiler, generally below 500 mg/Nm3, in addition to acid gases such as HF. In the smoke, there are some harmful substances such as heavy metals.