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本文对锌精矿加压氧化酸浸过程中影响浸取速度诸因素和硫在浸取和浮选过程中的行为进行了研究。影响浸取反应速度方面的主要结果是:1.Zn 的浸取与 O_2的消耗近成正比关系。在 Zn 浸取完成之前,溶液中铁离子主要呈 Fe~(2+)存在。浸取期间,O_2消耗速度 Ro_2(ml/g·min)与精矿中铁含量关系如下:Ro_2=K[Fe]=30×Fe%2.Zn 的浸取与 S~0的生成近于呈等当量线性关系。3.表面活性剂加入量多,被固体的吸附的量多,同时 Ro_2也增加,直至达到饱和吸附为止。Ro_2与 SAA 加入量 G(g/100g 矿)之间关系如下:Ro_2=A+aG/(1+bG)=1.6+27.3G/(1+10G)式中 A 为 G=0时的 Ro_2S~0吸附的 SAA 量远小于浸取渣所吸附的 SAA 量。4.Po_2与 Ro_2之关系,为典型的等温吸附式,即 Ro_2=0.64Po_2/(1+0.032Po_2)5.浸取时,溶液中 H_2SO_4量与精矿中 Zn 之当量比值由0.96变化至1.66,Ro_2几乎不变,表明 C_H~+对 Ro_2影响很小。加压氧化酸浸锌精矿之后的浸渣,其粒度分布与搅拌速度 rpm、SAA 加入量 G_(SAA)及浸取时间有关,主要结果如下:1.SAA 加入量由0.1至1.0g/100g 矿变化时,浸渣粒度分布的累积及微分曲线表明,G_(SAA)大,粒度细,表明 SAA 对硫磺有分散作用。呈颗粒状者,主要成份为 S~0(>90%S)。 2.增加 rpm,则浸渣粒度变粗,Po_2增加,仅对细粒度部分有影响,使粒度变细。3.浸取时间长,平均颗粒粒度大,小颗粒硫磺碰撞而并大的机会多。此外,尚对浸渣的物相组成,硫的分布及铁的分布进行了考察。
In this paper, the factors influencing the leaching rate and the behavior of sulfur in the process of leaching and flotation are studied in the process of pressure oxidation acid leaching of zinc concentrate. The main results that influence the leaching reaction rate are: 1. The leaching of Zn and the consumption of O2 are nearly proportional. Prior to the completion of the leaching of Zn, the iron ions in the solution were predominantly Fe2 +. During the leaching period, the relationship between the O 2 consumption rate Ro_2 (ml / g · min) and the iron content in the concentrate is as follows: Ro_2 = K [Fe] = 30 × Fe% 2. The leaching of Zn and the formation of S ~ Equivalent linear relationship. 3. Surfactant added in large amounts by the solid adsorption amount, while Ro_2 also increased until it reaches the saturation adsorption. The relationship between Ro_2 and the amount of G (g / 100g ore) G is as follows: Ro_2 = A + aG / (1 + bG) = 1.6 + 27.3G / (1 + 10G) 0 adsorbed SAA amount is much smaller than the amount of SAA adsorbed by leaching residue. The relationship between Ro_2 and Mo_2 is Ro_2 = 0.64Po_2 / (1 + 0.032Po_2) 5. The ratio of the amount of H_2SO_4 in the solution to the Zn in the concentrate changes from 0.96 to 1.66 , Ro_2 almost unchanged, indicating that C_H ~ + has little effect on Ro_2. The results showed that the size distribution of the leached residue after pressured zinc oxide leached zinc oxide was related to the stirring speed rpm, the SAA content and the leaching time. The main results are as follows: 1. The amount of SAA added was 0.1-1.0g / 100g When the ore is changed, the accumulation and differential curve of the particle size distribution of the leachate show that the G_ (SAA) is large and the particle size is fine, which indicates that the SAA has a dispersing effect on the sulfur. Granular, the main ingredient is S ~ 0 (> 90% S). 2. Increase rpm, the leaching particle size becomes coarse, Po_2 increased, only affect the fineness of the part, so that the particle size becomes thinner. 3 leaching a long time, the average particle size, large particles of sulfur collision and large opportunities. In addition, the phase composition, the distribution of sulfur and the distribution of iron were also investigated.