May242025 by adminrs

Low Cement, Ultra-Low Cement, and Cement-Free Castables

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In the early 1970s, Lafarge in France successfully developed low cement castables, followed by the development of ultra-low cement castables, which gained global application in the 1980s. In China, there is no unified standard for categorizing these castables. According to ASTM standards in the United States, they are defined based on the CaO content in the product. Unlike conventional refractory castables, low cement and ultra-low cement castables partially or largely replace calcium aluminate cement with ultrafine powders of the same…
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May242025 by adminrs

Phosphate, Aluminate, And Water Glass Bonded Castables

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Phosphate-Bonded Refractory Castables The composition of phosphate-bonded refractory castables is similar to that of general castables. Aggregates and powders include high-alumina, clay, silica, and magnesia. Phosphates such as aluminum phosphate and phosphoric acid react slowly with neutral and acidic aggregates and powders at room temperature. To enable hardening at room temperature, hardeners like active aluminum hydroxide, talc, ammonium fluoride, magnesium oxide, alkaline aluminum chloride, and calcium aluminate cement are added. Magnesium oxide is particularly effective as a hardener, but the…
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May242025 by adminrs

Classification of Refractory Properties And Their Application Fields

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Detailed Analysis of the Classification of Refractory Properties and Their Application Fields 1. Detailed Classification of Properties 1.1 Chemical Composition and Mineral Composition Silica Refractories: Primarily composed of silicon dioxide (SiO₂), silica refractories have excellent acid slag resistance and are commonly used in blast furnaces, hot blast stoves, and coke ovens. Aluminosilicate Refractories: Composed of alumina (Al₂O₃) and silicon dioxide, these refractories offer good heat resistance and thermal shock stability, making them widely used in high-temperature equipment such as blast…
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May222025 by adminrs

UAE Customers Visit Rongsheng Refractory Factory

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On May, 2025, Mr. Smith and Mr. Johnson, managers from the UAE branch of a leading industrial company, visited Rongsheng Refractory. Their goal was to evaluate our refractory materials for a large-scale industrial project in the Middle East. Customer Requirements The UAE customer required high-quality refractory bricks that could withstand extreme temperatures and maintain durability under challenging conditions. The materials were intended for use in their cement rotary kilns and required compliance with strict international standards to ensure operational efficiency…
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May222025 by adminrs

Selection of Refractory Materials For Different Types of Boilers

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The primary purpose of using wear-resistant refractory materials as linings in circulating fluidized bed (CFB) boilers is to protect the steel shell of the furnace from erosion and abrasion caused by the combustion materials. The most commonly used linings in boilers are monolithic refractories, including wear-resistant castables, plastic refractories, low-cement castables, corundum castables, steel fiber reinforced castables, and lightweight insulating castables. A typical power generation boiler consists of the combustion chamber, water-cooled walls, superheater, economizer, air preheater, and steam drum.…
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May132025 by adminrs

High Temperature Energy Saving Solution Recommended — Refractory Insulating Lining For Heating Furnace

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Heating Furnace Refractory Insulating Lining — Ceramic Fiber Board Product Overview The refractory insulating lining for heating furnaces plays a critical role in furnace construction, alongside refractory bricks. One of the most commonly used materials for this lining is aluminum silicate ceramic fiber board with a typical thickness of 10–50 mm. According to the form of lining materials, furnace linings are classified into brick linings, fiber linings, and monolithic linings. A typical lining structure includes both refractory bricks and insulating…
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May132025 by adminrs

New Order from Colombia: Rongsheng Corundum Spinel Ramming Mass Gains Global Trust

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On May 6, 2025, Rongsheng Refractory received a $1500 advance payment from a new customer in Colombia for an order of Corundum Spinel Ramming Mass. This marks another successful step in our continued global expansion and underscores the growing demand for reliable monolithic refractory materials in the Latin American steel and foundry industries. Customer Background The client is a mid-sized ferrous alloy producer based in Colombia, operating several induction furnaces for high-temperature smelting. They contacted us through our company website…
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May82025 by adminrs

Advanced Ladle Refractory Solutions: Enhancing Steelmaking Performance And Efficiency

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Advanced Ladle Refractory Solutions: Enhancing Steelmaking Performance and Efficiency Unlock Longer Ladle Life & Higher Steel Quality with Premium Refractories In modern steelmaking, the ladle has evolved from a simple steel-transport vessel to a critical secondary refining unit. This transformation demands refractory materials that can withstand extreme thermal, mechanical, and chemical stresses. At Rongsheng Refractory, we engineer high-performance ladle refractories that deliver longer service life, reduced downtime, and improved steel cleanliness—helping you maximize productivity and minimize costs. Why Do Ladle…
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Apr272025 by adminrs

The Use of Refractory Materials in Social Development and Their Manufacturing Processes

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The Use of Refractory Materials in Social Development and Their Manufacturing Processes During the period when technological progress in the steel industry was relatively slow, various new refractory materials were successively developed. The major products widely used in the first half of the 20th century included: High alumina bricks (used in heating furnaces, cement kilns, etc.) Chrome-magnesite bricks (used in open-hearth furnaces, electric furnaces, etc.) Electrocast bricks (used in heating furnaces, glass melting furnaces, etc.) In the second half of…
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Apr272025 by adminrs
Measures to Improve the Melting Capacity of Float Glass Furnaces

Measures to Improve the Melting Capacity of Float Glass Furnaces

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Based on the operating experience of domestic and international float glass furnaces, the main measures to enhance the melting capacity of float glass furnaces can be summarized as follows: optimizing furnace dimensions, utilizing high-calorific-value fuels and efficient burners, upgrading refractory materials, implementing full furnace-width batch charging, extending the fusion zone, increasing flame coverage, increasing the number of burners, raising melting temperatures, and adopting electric boosting. 01 Optimized Furnace Dimensions The furnace dimensions must match the desired melting capacity, particularly the…
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