Within the period of 2015–2017 at Nadezhda Metallurgical Plant (NMZ) the following new processing materials are tested to reduce pyrometallurgical slags: quartzite from the Shilkinsk deposit of Krasnoyarsk Territory (as a flux instead of overburden rock produced locally) and anthracites of various grades (as a reducing agent). The materials tested are attractive in terms of their price compared with the flux and reducing agent (coke) used currently. During the tests with imported quartzite in the process of electric-furnace slag reduction the specific flux consumption falls by 36.9% and the specific electric power consumption falls by 3.2%. There is no marked wear of protective accretions in the slag zone of the furnaces and there is no unfavorable effect on the level of hearth scale. Standard waste slag is produced. Various anthracite brands are tested industrially (i.e., AM-UHG, AKO-UHG produced by Listvyanskaya Mill of CJSC Siberian Anthracite, AKO brand manufactured by LLC Promprodukt, A of AO grade produced by LLC Southern Fuel Company). Tests show that an increase in anthracite fraction in the total amount of the reducing agent supplied for smelting causes undesirably low matte metallization with poor non-ferrous metal extraction into matte, especially cobalt. This results in increased specific consumption of the reducing agent per ton of charge processed in a slag-depletion electric furnace (SEF). Based on tests, the following order for matte metallization degree (in descending order) is obtained: AKO > A of AO grade > (mixture of AM-UHG and AKO-UHG). Testing of the first brand is stopped prematurely due to the abrupt critical reduction of matte metallization (up to 17.8% with a specified minimum value 19%) and low level of hearth accretion in the SEF, likely to fall below the point required for bottom protection. Taking account of the results obtained quartzite from Shilkinsk deposit is recommended for industrial use in order to reduce converter and FSF slags in the electric furnace. Anthracites of AM-UHG, AKO-UHG and A grade of AO are recommended for the partial replacement of the reducing agent used (from 50 to 75%), apart from the sample of AKO grade.

中文翻译：

---

纳杰日达冶金厂清渣炉排渣过程中新加工材料的应用

在 2015-2017 年期间，Nadezhda 冶金厂 (NMZ) 测试了以下新加工材料以减少火法冶金炉渣：来自克拉斯诺亚尔斯克边疆区 Shilkinsk 矿床的石英岩（作为熔剂，而不是当地生产的覆盖岩）和各种等级的无烟煤（作为还原剂）。与目前使用的助焊剂和还原剂（焦炭）相比，所测试的材料在价格方面具有吸引力。在电炉减渣过程中用进口石英岩试验，比焊剂消耗量下降36.9%，比电耗量下降3.2%。炉渣区保护层无明显磨损，对炉膛水垢水平无不利影响。产生标准废渣。各种无烟煤品牌进行了工业测试（即，CJSC Siberian Anthracite 的 Listvyanskaya Mill 生产的 AM-UHG、AKO-UHG，LLC Promprodukt 生产的 AKO 品牌，LLC Southern Fuel Company 生产的 AO 级 A）。试验表明，用于冶炼的还原剂总量中无烟煤比例的增加会导致不希望的低锍金属化，以及较差的有色金属提取到锍中，尤其是钴。这导致在贫渣电炉 (SEF) 中处理的每吨炉料的还原剂比消耗量增加。根据测试，得到以下哑光金属化程度的顺序（降序）：AKO>AO级的A>（AM-UHG和AKO-UHG的混合物）。由于哑光金属化的突然临界减少（高达 17.8%，指定的最小值为 19%）和 SEF 中低水平的炉膛堆积，第一品牌的测试过早停止，可能低于底部保护所需的点. 考虑到从 Shilkinsk 矿床获得的石英岩的结果，推荐用于工业用途，以减少电炉中的转炉和 FSF 炉渣。除了 AKO 级样品外，推荐使用 AM-UHG、AKO-UHG 和 A 级 AO 的无烟煤来部分替换所用的还原剂（50% 至 75%）。考虑到从 Shilkinsk 矿床获得的石英岩的结果，推荐用于工业用途，以减少电炉中的转炉和 FSF 炉渣。除了 AKO 级样品外，推荐使用 AM-UHG、AKO-UHG 和 A 级 AO 的无烟煤来部分替换所用的还原剂（50% 至 75%）。考虑到从 Shilkinsk 矿床获得的石英岩的结果，推荐用于工业用途，以减少电炉中的转炉和 FSF 炉渣。除了 AKO 级样品外，推荐使用 AM-UHG、AKO-UHG 和 A 级 AO 的无烟煤来部分替换所用的还原剂（50% 至 75%）。