A device selected from a glass furnace and a glass distribution channel comprising a block and/or a lining of a sintered product obtained by sintering a particulate mixture consisting of a matrix fraction and a granulate constituted respectively of particles having a size less than or equal to 50 μm, so-called "matrix particles" and particles having a size greater than 50 μm, so-called "grains", the matrix fraction representing more than 10% and less than 45% of the weight of the particulate mixture, said particulate mixture having a content of Cr 2 O 3 + Al 2 O 3 greater than 60%, in percentage by weight based on the oxides, and having a chromium oxide content, designated "Cr T ", between 10% and 82%, preferably between 10 and 80%, in percentage by weight based on the oxides of the refractory mixture, the matrix fraction of said particulate mixture being such that 0.39. Cr T + 24 < Cr M < 0.39. Cr T + 52 - Cr M denoting the content by weight of chromium oxide in the matrix fraction, in percentage by weight based on the oxides of the matrix, and the granulate being such that x II ≥ 97%, x III ≥ 70%, and x IV ≤ x III - 70% - Cr G denoting the content by weight of chromium oxide in a grain, in percentage by weight based on the oxides of said grain, - x II denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − if 10 % ≤ Cr T ≤ 30 %, then Cr G ≤ 0.018. Cr T 2 − 0.390. Cr T + 58.8; − if 30 % < Cr T ≤ 60 %, then Cr G ≤ 1.22. Cr T + 26.7; − if 60 % < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then Cr G ≤ 100, - x III denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − if 10 % ≤ Cr T ≤ 30 %, then 0.018. Cr T 2 + 9.10 ≤ Cr G ≤ 0.018. Cr T 2 − 0.390. Cr T + 25.10; − if 30 % < Cr T ≤ 60 %, then 1.17. Cr T − 21.5 ≤ Cr G ≤ 1.17. Cr T − 5.5; − if 60% < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then 1.17. Cr T − 21.5 ≤ Cr G ≤ 1.67. Cr T − 35.5, - x IV denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − If 10 % ≤ Cr T ≤ 30 %, then 0.018. Cr T 2 − 0.390. Cr T + 9.10 > Cr G; − If 30 % < Cr T ≤ 60 %, then 1.17. Cr T − 21.5 > Cr G; − If 60 % < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then 1.17. Cr T − 21.5 > Cr G. - Cr M denoting the content by weight of chromium oxide in the matrix fraction, in percentage by weight based on the oxides of the matrix, and the granulate being such that x II ≥ 97%, x III ≥ 70%, and x IV ≤ x III - 70% - Cr G denoting the content by weight of chromium oxide in a grain, in percentage by weight based on the oxides of said grain, - x II denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − if 10 % ≤ Cr T ≤ 30 %, then Cr G ≤ 0.018. Cr T 2 − 0.390. Cr T + 58.8; − if 30 % < Cr T ≤ 60 %, then Cr G ≤ 1.22. Cr T + 26.7; − if 60 % < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then Cr G ≤ 100, - x III denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − if 10 % ≤ Cr T ≤ 30 %, then 0.018. Cr T 2 + 9.10 ≤ Cr G ≤ 0.018. Cr T 2 − 0.390. Cr T + 25.10; − if 30 % < Cr T ≤ 60 %, then 1.17. Cr T − 21.5 ≤ Cr G ≤ 1.17. Cr T − 5.5; − if 60% < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then 1.17. Cr T − 21.5 ≤ Cr G ≤ 1.67. Cr T − 35.5, - x IV denoting the amount, in percentage by weight based on the granulate, of grains meeting the following condition: − If 10 % ≤ Cr T ≤ 30 %, then 0.018. Cr T 2 − 0.390. Cr T + 9.10 > Cr G; − If 30 % < Cr T ≤ 60 %, then 1.17. Cr T − 21.5 > Cr G; − If 60 % < Cr T ≤ 82 %, in particular if Cr T ≤ 80 %, then 1.17. Cr T − 21.5 > Cr G.