The possible reuse of powder Al₂O₃ waste formed in manufacturing of ceramic refractory products by plasma spraying was studied. The powder alumina waste was found to be individual particles α- and γ-Al₂O₃ and their conglomerates and also included iron oxides in the form of Fe₂O₃ and Fe₃O₄. It was shown that the plasma-spraying powder waste had to be purified of Al₂O₃ conglomerates and iron oxides in order to reuse it. For this purpose, powder waste should be sifted through a sieve and subjected to magnetic separation. It was established experimentally that such a powder can be reused for applying coatings and fabricating products by plasma spraying without degrading their quality

研究了等离子喷涂在陶瓷耐火材料生产中形成的粉末状Al ₂ O ₃废料的可能再利用。所述粉末氧化铝废物被认为是单个颗粒α-和γ-Al系₂ ö ₃和它们的集团，并且还包括在Fe的形式的铁氧化物₂ ö ₃和Fe ₃ Ò ₄。结果表明，等离子喷涂粉末废物必须净化Al ₂ O _3。团块和氧化铁，以便重复使用。为此，应将废粉通过筛子过筛并进行磁选。实验确定，这种粉末可通过等离子喷涂重复使用，以涂覆涂料和制造产品，而不会降低其质量