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$Henan Province Advances the Green Development Plan for the Refractory Materials Industry and Other Sectors$

Henan Province Advances the Green Development Plan for the Refractory Materials Industry and Other Sectors

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…

2022

$What impact does the move toward chromium-free refractories have on magnesia-chrome bricks?$

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…

2022

The future prospects for ceramic fibers are promising.

Ceramic fiber is a fibrous, lightweight refractory material that boasts numerous advantages, including light weight, high-temperature resistance, excellent thermal stability, low thermal conductivity, low specific heat, and resistance to mechanical vibration. Against the backdrop of increasingly stringent industrial energy‑saving and environmental‑protection regulations in recent years, ceramic fiber—capable of achieving 10–30% energy savings compared with traditional refractories such as insulating bricks and castables—has seen broader and more extensive adoption within China, with very promising prospects for future development. With the growing application of zirconia‑containing fibers and polycrystalline alumina fibers, operating temperatures have been raised to 1,000–1,400°C. However, due to product quality issues and outdated application technologies, both the scope of applications and the methods of implementation remain limited. For example, polycrystalline ox…

2022

$Applications of Silicon Carbide in Refractory Materials$

Applications of Silicon Carbide in Refractory Materials

1. Wear Resistance: Silicon carbide ranks second only to diamond in hardness and exhibits excellent wear resistance, making it an ideal material for wear‑resistant pipelines, impellers, pump chambers, hydrocyclones, and liners for mining buckets. Its wear life is 5 to 20 times that of cast iron or rubber, and it is also one of the preferred materials for aircraft runways. By applying silicon carbide powder to the inner surfaces of turbine blades or cylinder blocks using a specialized process, its wear resistance can be significantly enhanced, extending service life by a factor of 1 to 2. 2. Corrosion Resistance: In silicate‑bonded silicon carbide materials, the SiO₂ contained in the bonding matrix readily forms low‑melting-point compounds upon contact with certain substances, making the material susceptible to erosion by molten slag. Consequently, this type of silicon carbide…

2022

$What are the commonly used refractory materials?$

What are the commonly used refractory materials?

Functional refractories are precision‑manufactured refractory materials designed for specialized applications and capable of fulfilling specific functional requirements. Compared with conventional refractory products, they are distinguished by their dedicated roles in metallurgical processes; they are typically used as individual components or in combination with other auxiliary refractory products, and their fabrication adheres strictly to established production processes. Functional refractories emerged alongside the development of continuous casting technology in the steel industry and are more accurately termed “functional refractories for continuous casting.” At present, the principal refractory products employed in continuous casting include slide gates, long nozzles…

2022

$Steel production has declined, and refractory material output is likely to follow the same trend in the first quarter.$

Steel production has declined, and refractory material output is likely to follow the same trend in the first quarter.

According to data from the National Bureau of Statistics, in March 2022, China’s crude steel output totaled 88.295 million tons, down 6.4% year on year; for the January–March period, cumulative crude steel production reached 243.376 million tons, a decline of 10.5% compared with the same period last year. Recently, the National Development and Reform Commission and other ministries also stated that, to ensure policy continuity and stability and to consolidate gains in reducing crude steel output, nationwide efforts to cut crude steel production will continue in 2022. These measures will help achieve a year-on-year reduction in national crude steel output for 2022, guiding steel enterprises to abandon the extensive growth model focused on volume and promoting high-quality development in the steel industry. Based on crude steel production data, we can infer that refractory material output is likely to follow a downward trend as well. The main reasons are: (1) In the first quarter, overlapping environmental‑control measures during winter and spring, targeted enforcement periods, and the Lunar New Year holiday slowed the production pace of both steel and refractory manufacturers; (2) Since late February, the ongoing nationwide COVID‑19 situation, rising logistics costs, and transportation disruptions have hindered raw‑material procurement and finished‑product delivery, leading to inventory buildup for some products; and (3) Weak demand and rising production costs have kept trading activity at a subdued pace. Taking alumina—the key raw material for refractories—as an example, many alumina producers have operated at reduced capacity or with limited enthusiasm, driven by a combination of factors including higher raw‑ore prices and soaring fuel costs.

2022

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