About us

Longstone, registered in Tianjin Development Zone,  headquartered in Beijing, is a leading supplier of raw materials in China. Based on the importing and exporting business framework concerning products like metallurgy and minerals, and welding materials which have been operated by Sunstone International since its foundation in 1998, Longstone has keeping forging ahead with developing new products and exploring new markets in the fields of metallurgy, refractory, welding consumables, chemical industry and building materials industry, etc.. And guided by the national policies, we have established our own culture: people foremost and with bold innovation; and also the strategic idea of market-oriented and customer focus. Meanwhile, we established, in succession, representative offices in Mid-east, and long-term strategic cooperation relationship with Korea, the Netherlands, the United States, Turkey, and India. Up till now, the company’s international business has covered more than 20 countries or regions.

The international business of Longstone has been oriented in welding flux materials, metallurgical raw materials, and the importing of mineral resources. Among which,

Welding flux materials business mainly involves imports and exports, and domestic trade as well. Since its foundation, the company, with more than ten-year’s unremitting efforts, has achieved a high reputation in supplying of welding flux materials. Currently, Longstone has been developed into a world-renowned welding flux materials supplier, whose main products include Bauxite, DBM, ferroalloys, chemical products and various metal powders, etc..

The metallurgical raw materials business involves a wide range of products, which include various kinds of refractory raw materials, and all kinds of shaped and unshaped refractory products; metallurgical materials like coke, carbon additive, and ferroalloys; carbon raw materials like petroleum coke, calcined petroleum coke, coal-tar pitch; and different kinds of chemical products as well.

Mineral resources mainly involve minerals like chrome ore, iron ore, manganese ore, coal etc.. Relying on the guiding of national policies, the company is brave in experimenting and daring innovation, which leads to the enlarging of imports for other resources products.

Moreover, Longstone has its own Logistics Centre in Tanggu District, Tianjin, to take charge of the logistics of the above mentioned products. The Logistics Centre is equipped with sound storage facilities and quality inspection equipments, which can fully meet the needs in the cargo warehousing, transportation, distribution and quality control.

Longstone has, for all the time, adhered to the international trade practices, with the operation philosophy of contract-abiding, trustworthy, first-rate service and to achieve mutual benefits and win-win situation. Under the rule of ISO9001:2000--- the quality management system, Longstone has established an extensive cooperation relationship with international trade, industry, science and technology, and financial circle, which established a trade bridge to connect China and the international market. Longstone is ready to cooperate sincerely with friends from all the world, and to achieve common development. 

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