阅读说明：本技术 一种含金硫化矿石的选矿方法 (Beneficiation method for gold-bearing sulfide ore ) 是由 逄文好 郝福来 王铜 宋超 于 2019-11-08 设计创作，主要内容包括：本发明提供一种含金硫化矿石的选矿方法,属于矿物加工技术领域。原矿粉矿经磨矿分级作业后,得到细度在-0.074mm含量占58％～63％之间,矿浆质量百分浓度在28％～33％之间的矿浆；矿浆中加入硫化矿物捕收剂、起泡剂,调浆后进入浮选作业。经粗选作业得粗选精矿,粗选精矿进入各级精选作业,经多次精选得到最终精矿；粗选尾矿进入水力旋流器分级,水力旋流器的沉砂返回磨矿机,水力旋流器的溢流进入各级扫选作业,经多次扫选得到最终尾矿。本发明利于金矿物的充分解离,利于浮选对连生金矿物的选择性选别,既可保证了精矿品位合格,又可提高金的回收率。本发明工艺流程简单,生产成本低,选矿指标理想。(The invention provides a beneficiation method of gold-containing sulfide ore, belonging to the technical field of mineral processing. Grinding and grading the raw ore powder to obtain ore pulp with the fineness of-0.074 mm and the content of 58-63 percent and the mass percentage concentration of 28-33 percent; adding sulfide mineral collecting agent and foaming agent into the ore pulp, mixing the pulp, and then carrying out flotation operation. Roughing operation is carried out to obtain roughing concentrate, the roughing concentrate enters each stage of concentration operation, and final concentrate is obtained after multiple times of concentration; and (3) the roughed tailings enter a hydrocyclone for grading, settled sand of the hydrocyclone returns to an ore mill, overflow of the hydrocyclone enters scavenging operation of each stage, and the final tailings are obtained through multiple scavenging. The invention is beneficial to the full dissociation of the gold mineral, is beneficial to the selective separation of the flotation on the continuous gold mineral, can ensure the qualified grade of the concentrate and can improve the recovery rate of gold. The invention has simple process flow, low production cost and ideal mineral dressing index.)

1. A beneficiation method for gold-bearing sulfide ore is characterized by comprising the following steps:

grinding and grading the raw ore powder to obtain ore pulp with the fineness of-0.074 mm and the content of 58-63 percent and the mass percentage concentration of 28-33 percent; adding a sulfide mineral collecting agent with good selectivity according to the mass of 0.08-0.15 per mill of solid in the ore pulp, adding a foaming agent according to the mass of 0.02-0.05 per mill of solid in the ore pulp, and performing flotation operation after size mixing; roughing operation is carried out to obtain roughing concentrate, the roughing concentrate enters each stage of concentration operation, and final concentrate is obtained after multiple times of concentration; and (3) the roughed tailings enter a hydrocyclone for grading, settled sand of the hydrocyclone returns to the grinding and grading operation for regrinding, overflow of the hydrocyclone enters various scavenging operations, and the final tailings are obtained through multiple scavenging.

2. The process for beneficiation of gold-containing sulfide ore according to claim 1, characterized in that: the sulfide mineral collecting agent adopts butyl xanthate.

3. The process for beneficiation of gold-containing sulfide ore according to claim 1, characterized in that: the foaming agent adopts terpineol oil.

4. The process for beneficiation of gold-containing sulfide ore according to claim 1, characterized in that: the concentration operation is performed twice in total.

5. The process for beneficiation of gold-containing sulfide ore according to claim 1, characterized in that: and the overflow of the hydrocyclone enters each stage of scavenging operation for three times.

Technical Field

The invention belongs to the technical field of mineral processing, and particularly relates to a beneficiation method of gold-bearing sulfide ore.

Background

Flotation is one of the main beneficiation methods for treating gold-containing sulfide ores, and the process is widely applied due to simple flow, environmental friendliness and low production cost.

The conventional flotation process flow is simple and practical, the sorting requirement of most ores can be met, but the conventional process can cause the problems of insufficient gold concentrate grade, poor recovery effect due to insufficient dissociation degree of the continuous gold mineral, low mineral separation recovery rate, over-grinding of target minerals and the like in the sorting of gold-containing ores with complex embedded granularity.

Disclosure of Invention

The invention provides a beneficiation method of gold-bearing sulfide ore, which aims to solve the problems that the conventional process has insufficient gold concentrate grade, insufficient dissociation degree of continuous gold mineral and poor recovery effect, low beneficiation recovery rate, over-grinding of target mineral and the like in the beneficiation of gold-bearing ore with complex disseminated granularity.

The technical scheme adopted by the invention is that the method comprises the following steps:

grinding and grading the raw ore powder to obtain ore pulp with the fineness of-0.074 mm and the content of 58-63 percent and the mass percentage concentration of 28-33 percent; adding a sulfide mineral collecting agent with good selectivity according to the mass of 0.08-0.15 per mill of solid in the ore pulp, adding a foaming agent according to the mass of 0.02-0.05 per mill of solid in the ore pulp, and performing flotation operation after pulp mixing. Roughing operation is carried out to obtain roughing concentrate, the roughing concentrate enters each stage of concentration operation, and final concentrate is obtained after multiple times of concentration; the roughed tailings enter a hydrocyclone for grading, settled sand of the hydrocyclone returns to grinding and grading operation for regrinding, overflow of the hydrocyclone enters scavenging operation of each stage, and final tailings are obtained through multiple scavenging;

the sulfide mineral collecting agent adopts butyl xanthate;

the foaming agent adopts the pine oil;

the selection operation of the invention is carried out twice;

the overflow of the hydrocyclone of the invention enters each stage of scavenging operation for three times.

The invention has the advantages that: the tailings of the roughing operation do not directly enter scavenging operation, but are graded by a hydrocyclone, and the settled sand of the hydrocyclone returns to grinding and grading operation for regrinding, so that undissociated mineral particles can be fully separated by monomers, and overgrinding can be prevented; the overflow of the hydrocyclone enters each stage of scavenging operation. The process is beneficial to the full dissociation of the gold minerals and the selective separation of the flotation on the continuous gold minerals, thereby not only ensuring the qualified grade of the concentrate, but also improving the recovery rate of the gold. The process flow is simple, the production cost is low, the mineral separation index is ideal, the gold mineral in the gold-bearing sulfide ore can be efficiently recovered, the existing resources are utilized to the maximum extent, and the mineral separation product with qualified quality is obtained.

Detailed Description

The present invention will be further described with reference to the following examples.