In ramming coking, coal cakes tend to collapse; what are the main reasons for this?

A rough analysis shows: 1. The compacted coal briquettes do not have sufficient strength; 2. The fineness of the blended coal does not meet the requirements; 3. The moisture content of the blended coal is not within the specified limits

There are many situations related to coal collapse. The most fundamental factors include the method and approach of tamping, the batches in which coal is released, as well as the number of times tamping is performed. When coal is being discharged into the chute, it’s important to pay attention to the tamping methods. Are you using a tamping station or tamping machines? (I’m a tamping worker; our facility has two 3-hammer tamping machines, and we use 3.8M tamping coke ovens. At the beginning of operations, we encountered many problems with coal accumulation, but over time we developed various techniques and methods. The key to effective tamping lies in using the right methods. We use a method that involves releasing coal in 5 batches; after the two tamping machines have discharged the coal, we then start stacking it. I’m not sure whether coal is released from the front or the back – please explain in detail so we can continue discussing this.) Thank you: victory:

Moisture control is also crucial, keeping it at 11–12%.

1. Whether the lithological composition, fineness, and moisture content of the blending coal are appropriate. 2. Whether the ramming machinery is in good working condition. 3. Whether the ramming process follows the established specifications　

The fineness should be above 85%, with a moisture content of around 9%. Coal should be discharged multiple times and compacted firmly.

The moisture content is generally best at around 10-12, with a fineness of around 90. However, it also depends on the skill level of the rammer. At our plant, we are currently working with coal with a moisture content of around 14% and a fineness of 90%, but there isn’t much excess coal either. In summary, it depends on the stability of the moisture fineness of the blending coal.

It also has a lot to do with the operation.

It mainly comes down to fineness and moisture content. The data used by our company shows a moisture content of 9.5–12.5%, and a fineness level of 90%

The moisture content should be kept between 9% and 11%, the fineness level should be above 90%, the coal pellets need to be compacted, and the coal loading process must be carried out smoothly. Of course, it also has a lot to do with the performance of the rammer and the coal loader.