Electrode pitch is a major commercial product of coal-tar refining and will remain an important raw material for high-quality carbon items for the foreseeable future. The main customers for this pitch are aluminum plants, which use it for making anodes. In order to preserve customer value and thus justify the operation of tar-refining operations, this product must meet the constantly rising demand for quality. Since the 1990s, electrode pitch producers have faced the following problems. With the newer, high-capacity coke-oven batteries having a high level of heating (1000-1100 mm) and longer coking times, coal tar is much less pyrolyzed. Many plants produce tars that have a density of < 1180 kg/m~3 and contain 5-6 and 3 percent of alpha and alpha_1 fractions, respectively. This has caused difficulties obtaining pitch to the standards of GOST 10200-83, especially the requirements for content of alpha fractions and volatile matter (coke residue).
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机译：电极沥青是煤焦油精炼的主要商业产品，在可预见的将来仍将是生产高质量碳产品的重要原料。这种沥青的主要客户是铝厂，用它来制造阳极。为了保留客户价值并因此证明焦油精炼操作的合理性，该产品必须满足不断提高的质量要求。自1990年代以来，电极沥青生产商面临以下问题。使用具有高加热水平（1000-1100毫米）和更长焦化时间的新型高容量焦炉电池，煤焦油的热解少得多。许多植物产生的焦油密度小于1180 kg / m〜3，分别包含5-6％和3％的alpha和alpha_1组分。这导致难以获得符合GOST 10200-83标准的沥青，特别是对α馏分和挥发性物质（焦炭残渣）含量的要求。
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