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QYAKITY CREATES VALUE,AND EXCELLENCE DETERMINES SUCCESS OR FAILURE

  

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From the very beginning of its establishment, the company obtained independent import and export rights approved by the Ministry of Commerce, and all its products are sold to

various countries and regions around the world.

  • Ordinary fused magnesia

  • Large crystal fused magnesia

  • Lowsilicon highcalcium fused magnesia

  • Magnesia-carbon bricks for converters

  • Magnesiacarbon bricks for electric furnaces

  • Ladle magnesia carbon bricks

About Us

   

       Yingkou Dayi Mineral Products Co., Ltd. was established in 1994. The company is located in Huzhuang Town, Dashiqiao City, Liaoning Province, known as the "Magnesium Capital of China." It covers an area of 48,000 square meters and is conveniently situated just 500 meters from the Huzhuang exit of the Shenyang-Dalian Expressway, 210 kilometers from Dalian Port, 60 kilometers from Bayuquan Port, 5 kilometers from Dashiqiao Station on the Harbin-Dalian Railway, and a 30-minute drive from Yingkou Airport. This strategic location provides ideal external conditions for the company. After more than 20 years of development, the company has accumulated extensive production and operational experience. 
       From its inception, the company obtained independent import and export rights approved by the Ministry of Commerce, and its products are sold to various countries and regions worldwide…

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  • 1994

    The company was founded in 1994.

  • 48000

    The company covers an area of 48,000 square meters.

  • 150000

    Annual production of various products is 150,000 tons.

  • 130

    The company has over 130 employees.

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Experience Advantage

The company was founded in 1994 and, after more than 30 years of development, has accumulated extensive production and operational experience.

Equipment Advantage

The company's fused magnesia plant consists of two production workshops, equipped with 10 energy-efficient and high-performance electric furnaces, and employs a large number of technical and managerial personnel with many years of experience in fused magnesia production.

Production Advantage

Utilizing scientific management methods and comprehensive quality control procedures, the company has an annual production capacity of 70,000 tons of various fused magnesia products, 20,000 tons of gunning materials, and 60,000 tons of various magnesia-carbon bricks.

 

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Continuously enhance the enterprise's competitiveness in the international market, striving to achieve customer satisfaction with products and services.

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Production Process of Fused Magnesia

The production process of fused magnesia is short and simple, but it involves significant equipment investment and resource consumption. In China, the fused magnesia industry primarily uses electric arc furnaces to melt natural magnesite ore for production. However, the production technology and equipment are outdated, characterized by low power, small capacity, low efficiency, and a low degree of automation. This results in fused magnesia products of subpar quality, leading to low utilization of magnesium resources and severe environmental pollution.
<h4 style=Introduction to the Types and Properties of Magnesia" src="http://aosspic10001.websiteonline.cn/jsoad26e9/image/newtp8.jpg">

Introduction to the Types and Properties of Magnesia

Sintered magnesia is a sintered block obtained by calcining natural magnesite ore (MgCO3) at high temperatures, which is then crushed and screened. Alternatively, it is a magnesium oxide raw material produced by fully sintering magnesium hydroxide derived from seawater or brine at temperatures between 1450-1900°C. Typically, sintered magnesia refers to the product obtained by calcining magnesite ore. Due to its high sintering temperature and excellent sintering degree, sintered magnesia is also known as dead-burned magnesia, distinguishing it from lightly burned magnesium oxide. It serves as a raw material for producing ordinary magnesia bricks and unshaped refractory materials.
<h4 style=How Are Magnesia Carbon Bricks Manufactured" src="http://aosspic10001.websiteonline.cn/jsoad26e9/image/newtp6.jpg">

How Are Magnesia Carbon Bricks Manufactured

Magnesia carbon bricks are produced by pressing a mixture of fused magnesia (sintered magnesia) and flake graphite (primarily fully crystalline graphite) with resin as a binder, followed by heat treatment. To enhance oxidation resistance, antioxidants such as metals are often added. When used at high temperatures, magnesia carbon bricks form a carbon skeleton bond. Since magnesia and carbon do not mutually dissolve, they retain the excellent refractory properties of the original components. Carbon has good thermal conductivity, low thermal expansion coefficient, and low elastic modulus, effectively preventing high-temperature spalling and slag penetration. Structural spalling is less likely to occur, significantly improving the critical weakness of structural spalling caused by slag penetration. Additionally, carbon is non-wetting to slag.
<h4 style=Introduction to Fused Magnesia" src="http://aosspic10001.websiteonline.cn/jsoad26e9/image/newtp5.jpg">

Introduction to Fused Magnesia

Fused magnesia is produced by melting high-quality magnesite. The English name for Dashiqiao refractory material is fused magnesite. It is produced by high-temperature calcination of magnesite, brucite, or magnesium hydroxide extracted from seawater. It is a general term for products derived from magnesite and other magnesium-based raw materials processed at high temperatures to achieve sintering. Magnesia produced by calcining natural magnesite in high-temperature equipment such as shaft kilns or rotary kilns using a single-step or two-step calcination process is called sintered magnesia. Magnesia formed by melting magnesite and other raw materials in an electric arc furnace until molten and then cooling is called fused magnesia. Magnesia extracted from seawater is called seawater magnesia.

© Copyright 2025 - Yingkou Dayi Mineral Products Co., Ltd.   All Rights Reserved The company mainly produces high-purity large crystal fused magnesia, ordinary fused magnesia, high-calcium low-silicon fused magnesia, magnesia carbon bricks, alumina magnesia carbon bricks, alumina silicon carbide carbon bricks and supporting refractory materials for converters, electric furnaces, ladles, torpedo cars, and hot metal ladles. Welcome to inquire by phone! Liao ICP No. 2025070390

Technical Support: Yingkou Xingchuang Network Technology Co., Ltd.