Magnesia weir plates can be used for monolithic refractories; this dataset includes major raw and auxiliary materials and energy used in the production process, while infrastructure such as production equipment and factory construction is not included within the system boundary of the dataset; the life cycle inventory is compiled from data obtained from multiple sources; the production process of magnesium weir plates includes raw material preparation, mixing, molding, baking, curing and demolding, quality inspection, and packaging.