Abstract

The indicator values of foundry coke quality are determined by means of testing at coke plants. As a rule, the consumers of foundry coke and foundry enterprises are located at a distance from coke plants. Foundry coke is transported in bulk in the open railroad cars. In this regard, the aim of this work is to reveal the effect of transportation on the quality of foundry coke. To determine the effect of transportation distance, the destruction index P_T (%) was introduced. The experimental results have shown that the destruction degree of foundry coke is not the same at different transportation intervals. When transporting over distances up to 300 km, the coke with the minimum value of M₄₀ durability index undergoes destruction. With an increase in the transportation distance from 900 to 2500 km, the destruction rate of foundry coke increases by 2.08–3.02% depending on the batch. For all batches, the formation of a fraction less than 40 mm was observed depending on the value of M₄₀ durability index from 0.25 to 1.41%. For foundry coke characterized by high values ​​of the durability index, the fraction of 80 mm or larger is kept during transportation. With an increase in the ambient air humidity during transportation by 40%, the moisture content in coke samples with a fraction of 40–60, 60–80, and 80 mm and larger increases more than in 24, 17, and 10 times, respectively. With a decrease in the air humidity by 34%, the amount of moisture in a gram of coke with a fraction of 40–60, 60–80, and 80 mm or larger decreases in 2 times, 1.26 times, and 1.45 times, respectively. Compared with coke with a fraction of 60–80 and 80 mm and larger, the moisture content of coke with a fraction of 40–60 mm increases at a higher rate with an increase in the ambient air humidity.

中文翻译：

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运输对铸造焦品质的影响

摘要

铸造厂焦炭质量的指标值是通过在焦炭厂进行测试确定的。通常，铸造焦炭和铸造企业的消费者与焦炭厂相距较远。铸造焦炭是在露天有轨电车中散装运输的。在这方面，这项工作的目的是揭示运输对铸造焦炭质量的影响。为了确定输送距离的效果，破坏指数P _Ť（％）进行了介绍。实验结果表明，在不同的运输间隔下，铸造焦的破坏程度是不同的。当运输距离达300 km时，焦炭的最小值M ₄₀耐久性指数遭到破坏。随着运输距离从900公里增加到2500公里，铸造焦的销毁率提高了2.08–3.02％（取决于批次）。对于所有批次，观察到小于40 mm的馏分形成，具体取决于M ₄₀的值耐久性指数从0.25到1.41％。对于具有高耐久性指标值的铸造焦，在运输过程中应保持80毫米或更大的分数。随着运输过程中环境空气湿度的增加40％，焦炭样品中水分含量为40–60、60–80和80 mm或更大的水分含量分别增加了24倍，17倍和10倍以上。随着空气湿度降低34％，克含量为40-60、60-80和80毫米或更大的克焦炭中的水分分别减少2倍，1.26倍和1.45倍。与分数为60–80和80毫米及更大的焦炭相比，分数为40–60毫米的焦炭的水分含量随着周围空气湿度的增加而以更高的速率增加。