本文選題：銅精礦　切入點：金　出處：《冶金分析》2017年12期

【摘要】：采用鉛試金重量法測定銅精礦中的金和銀時,因銅精礦中的銅含量較高,在高溫熔融時,部分銅會與金和銀一起保留在鉛扣中,造成灰吹時銅會形成氧化銅渣從而使鉛扣產(chǎn)生凍結(jié)現(xiàn)象進而影響測定。通過優(yōu)化實驗條件消除了試樣中銅對測定的影響,最終實現(xiàn)了鉛試金重量法對銅精礦中金和銀的測定。探討了鉛試金時鉛扣中銅量對灰吹效果的影響,結(jié)果表明,當(dāng)鉛扣中銅質(zhì)量小于1g時,銅對金和銀的測定結(jié)果無影響。對鉛試金重量法測定銅精礦中金和銀的條件進行了優(yōu)化,結(jié)果表明,通過選擇試樣量為15g,配料中氧化鉛量為135g、硅酸度為0.5,可有效的將鉛扣中的銅量控制在1g以下,據(jù)此消除了試樣中銅對測定的影響�？疾炝嘶掖禍囟葘鸷豌y測定結(jié)果的影響,確定灰吹溫度為860℃。方法應(yīng)用于銅精礦實際樣品分析,分析結(jié)果與國家標準方法 GB/T 3884.1—2012吻合。按實驗方法分別對2個銅精礦樣品平行測定7次,金測定結(jié)果的相對標準偏差(RSD)小于5%,銀測定結(jié)果的相對標準偏差小于2%。
[Abstract]:When the lead test gold gravimetric method is used to determine gold and silver in copper concentrate, because the copper content in copper concentrate is high, when melting at high temperature, some copper will be retained in lead buckle together with gold and silver.Copper oxide slag will be formed during soot blowing and lead buckle will freeze, which will affect the determination.The influence of copper on the determination of copper in the sample was eliminated by optimizing the experimental conditions, and the determination of gold and silver in copper concentrate was finally realized by the gravimetric method of lead test gold.The effect of copper content in lead buckle on soot blowing effect was discussed. The results showed that copper had no effect on the determination of gold and silver when the mass of copper in lead buckle was less than 1 g.The conditions for the determination of gold and silver in copper concentrate by lead test gold gravimetric method are optimized. The results show that the copper content in lead buckle can be effectively controlled below 1g by selecting the sample quantity of 15g, the amount of lead oxide in the batching is 135g, and the degree of silicic acid is 0.5.Therefore, the influence of copper in the sample on the determination was eliminated.The influence of soot blowing temperature on the determination results of gold and silver was investigated, and the soot blowing temperature was determined to be 860 鈩，

本文編號：1717269