Please help me in checking Process - task 1 ielts

The diagram illustrate the process involved in the production of ceramic pots.

Overall, the manufacturing requires a series of stages, beginning with the exploitation of raw material in nature and ending with the appearance of finished pots.

At the first stage of the process, the raw material has been dug out of the ground and then it is delivered to the manufactory by lorry. After that, the soil is crushed twice by automatic grinders, thereby it is mixed with water before the mixture is piped to moulds. Next to the moulding process, the mixture is withered during 4-6 hours and then assembled to the pot shape.

After the assembly stage, several clay pots are steamed in a big oven in 1000 degree celcius, prior to be coloured by human intervention. Subsequently, these pots was again dried in the oven in a period of time and ready to emerge the finished pots.