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采用红外光谱、X射线光电子能谱、接触角测定等方法对添加羧甲基纤维素钠的原矿压球所得含碳球块强度提高机理进行了研究.发现黏结剂羧甲基纤维素钠中羧基(—COOH)和羟基(—OH)在原矿颗粒表面产生了化学吸附作用,使矿石颗粒表面的亲水性下降;而羧甲基纤维素钠中有机碳链与煤粒表面作用,使煤的疏水性下降.原矿和煤粒依靠羧甲基纤维素钠高分子有机链结合起来,通过黏结剂颗粒间的黏附能力形成具有一定强度的“连接桥”网状结构.因此加入羧甲基纤维素钠后原矿含碳球块强度得到大幅提高.
The mechanism of increasing the strength of the carbon-containing pellets obtained by adding sodium carboxymethylcellulose was studied by means of infrared spectroscopy, X-ray photoelectron spectroscopy, contact angle measurement, etc. It was found that the carboxyl group in the sodium carboxymethylcellulose (-COOH) and hydroxyl (-OH) produced chemical adsorption on the surface of ore particles, which decreased the hydrophilicity of the surface of ore particles. However, the organic carbon chains in sodium carboxymethylcellulose interacted with the surface of coal particles, Hydrophobicity decreased.Coal ore and coal particles rely on the combination of sodium carboxymethyl cellulose polymer chains, through the adhesion between the adhesive particles to form a certain degree of strength “bridge” network structure. So add carboxymethyl Cellulose sodium after the original carbon steel ball strength has been greatly increased.