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Breathable bricks are the key air supply components for steelmaking bottom blowing technology. At present, the air supply components of the bottom blowing system commonly used in the iron and steel metallurgy industry are divided into two categories according to their installation methods: built-in integral breathable bricks; replaceable externally installed split breathable bricks. The airway structure of breathable bricks is generally slit type. In recent years, the company has developed a new type of diffused breathable brick products.
Keywords:
Breathable bricks are the key air supply components for steelmaking bottom blowing technology. At present, the air supply components of the bottom blowing system commonly used in the iron and steel metallurgy industry are divided into two categories according to their installation methods: built-in integral breathable bricks; replaceable externally installed split breathable bricks. The airway structure of breathable bricks is generally slit type. In recent years, the company has developed a new type of diffused breathable brick products.
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Externally mounted breathable brick
Breathable bricks are the key air supply components for steelmaking bottom blowing technology. At present, the air supply components of the bottom blowing system commonly used in the iron and steel metallurgy industry are divided into two categories according to their installation methods: built-in integral breathable bricks; replaceable externally installed split breathable bricks. The airway structure of breathable bricks is generally slit type. In recent years, the company has developed a new type of diffused breathable brick products.
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On March 6, a working symposium organized by the Provincial Building Materials Association and attended by presidents and secretaries-general of provincial associations representing industries such as circular economy and energy conservation, iron and steel, nonferrous metals, chemicals, casting and forging, refractories, automobiles, apparel, textiles, plastics, and wires and cables was held in Zhengzhou. The meeting focused on the national macro policies promoting green and low‑carbon development, energy conservation, and emissions reduction, as well as the in-depth implementation of Henan Province’s “Ten Thousand People Assist Ten Thousand Enterprises” initiative. Each association briefly outlined the distinctive features of its respective sector, shared updates on ongoing work, and engaged in an in-depth discussion on the potential for cross‑industry collaboration to advance solid waste utilization, energy conservation and emissions reduction, and the realization of a circular economy. Given the frequent upstream–downstream industrial linkages among these associations, it was recommended that the Provincial Circular Economy and Energy Conservation…
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What impact does the move toward chromium-free refractories have on magnesia-chrome bricks?
Hexavalent chromium primarily originates from industrial processes such as chromium ore smelting, refractory manufacturing, electroplating, leather tanning, pigment production, and chemical synthesis, as well as from chromium‑containing exhaust gases, wastewater, and solid waste generated by fuel combustion. Hexavalent chromium is not biodegradable in the environment; it contaminates soil and groundwater, is readily absorbed by the human body, and can accumulate in tissues via ingestion, inhalation, skin contact, and mucosal exposure. It has been classified by the International Agency for Research on Cancer as a potent carcinogen. Consequently, hexavalent chromium pollution has attracted global attention. At present, the main sources of hexavalent chromium in cement are fourfold: raw and fuel materials, crushing and grinding equipment, magnesia–chromium bricks, and industrial waste residues. Among these, the raw materials and…
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