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Domestic water filter industrial water filtration coke coke [Products] German source filter is mainly used in the blast furnace coke and for copper, lead, zinc, titanium, antimony, mercury and other non-ferrous metal smelting blast furnace, a reducing agent, fever agents and materials column skeleton. Blast furnace using coke instead of charcoal, laid the foundation for large-scale modern blast furnace, it is a major milestone in the history of metallurgy. For the blast furnace operation to achieve better technical and economic indicators, metallurgical coke (metallurgical coke) must have the appropriate chemical and physical properties, including the smelting process of thermal properties. In addition to a large number of coke for iron and non-ferrous metal smelting (metallurgical coke), but also for casting, chemical, calcium carbide and ferroalloy, their quality requirements vary. Such as foundry coke, general requirements for large size, low porosity, high fixed carbon and low sulfur; chemical coke gasification, strict requirements for strength, but requires that the reaction is good, high ash melting point; carbide production coke requirements maximize the fixed carbon content. Ability to carry out chemical reactions [reactivity and strength of coke after reaction] coke reactivity with carbon dioxide, oxygen and water vapor, CRI = (G0-G1) / G0 × 100% (Note: G0 ---- Test coke sample weight, g; G1 ---- coke sample weight after the reaction, g;). Coke strength after reaction refers to the reaction of coke after another mechanical force and thermal stress fracture and ability to resist wear. Coke in the blast furnace, foundry iron and fixed bed gasification process, should occur with carbon dioxide, oxygen and water vapor chemical reactions. Since the reaction of coke with oxygen and water vapor react with carbon dioxide similar laws, most countries with a reactive properties of coke and carbon dioxide between the assessment of coke reactivity. After the coke reactivity CRI and CSR response intensity repeatability r must not exceed the following values: CRIr≤2.4% CSR: ≤3.2% after reaction of coke reactivity and strength test results are taken parallel to the arithmetic average of the test results.