here are a few corrections for your writing task 1. Hopefully, those can help you to improve your skill.
The diagram shows the information about the stages in the cement to use for concrete production
If you mentioned that the diagrams only describe producing cement, it would seem you review partially. You should wroteTHE DIAGRAMS ILLUSTRATE A WAY TO PRODUCE CEMENT AND HOW COMPOSITION OF THE CEMENT AND OTHER MATERIALS TO MAKE CONCRETE.
Overall, the process was divided into 2 ways people made linear process.
I have not got the point of what you meant. You might be gonna say
OVERALL, THE PROCESS WAS DIVIDED INTO 2 WAYS TO PRODUCE THE HIGH QUALITY CONCRETE.
... of cement production
was insert(you should use the present tense because you explained the fact)
IS MIXING the limestone (...) until
... passed through the MACHINE OF mixer for several minutes
PRIOR TO it passed the small pipe.
... will produce sourceS of cement. Another
IS THAT the material
IS grinded by grinder and
IS PRODUCED IN THE FORM OF THE cement. In the end, the cement
IS packed in the bags and
can continue to the another steps.
READY TO BE TRANSPORTED.
... and gravel (50%)
THE mixer OF CONCRETE.
... will mix
ALL materials and
will produce the concrete.