In the process of roasting zinc; low melting point, easy to produce scarring phenomenon of roasting furnace.

碳：含量较多时，在焙烧过程中发热很高，炉温不易控制，还要消耗较多的氧，生成一氧化碳或二氧化碳，影响转化。

Carbon: content of more, a high fever in the roasting process, temperature is not easy to control, but also consume more oxygen, to generate carbon monoxide and carbon dioxide effect of invert.

钙、镁碳酸盐：硫铁矿石中的钙、镁碳酸盐脉石(白云石、方解石)使硫铁矿在焙烧过程中分解出二氧化碳气体，稀释了炉气中二氧化硫的浓度。同时，氧化钙和氧化镁还吸收部分二氧化硫形成硫酸钙和硫酸镁，降低了硫的利用率，使设备的生产能力下降。而且新形成的钙、镁硫酸盐残留在硫铁矿石的烧渣中，影响综合利用。

Calcium and magnesium carbonate: sulfur iron ore in the calcium and magnesium carbonate minerals (calcite and dolomite) make the pyrite in the roasting process of decomposition of carbon dioxide gas, dilution of the concentration of sulfur dioxide in the gas stove. At the same time, calcium oxide and magnesium oxide also absorb some of the sulfur dioxide to form calcium sulfate and magnesium sulfate, reducing the utilization of sulfur, so that the production capacity of the device decreased. And the new form of calcium, magnesium sulfate residues in the pyrite slag, the impact of comprehensive utilization.

在制造二硫化碳人造纤维时，硫铁矿石中的沥青和砷是有害杂质。

In the manufacture of carbon disulfide in man-made fiber, asphalt and sulfur in iron ores is harmful impurities.

在造纸工业中，制亚硫酸盐纸浆的硫不能含硒，因为硒会使纸发黑。

In papermaking industry, sulfur can not sulfite pulp containing selenium, because selenium will make black paper.

在制造火柴和炸药时，硫中不能含微量的二氧化硅杂质，因为二氧化硅会妨碍燃烧。

In the manufacture of matches and explosives, sulfur can not contain trace amounts of silicon dioxide impurities, because the silica will hinder the combustion.