CN-121972304-A - Combined collector for lead oxide silver ore sulfur-oxygen mixed flotation and application thereof

Abstract

The invention discloses a combined collector for lead oxide silver ore sulfur-oxygen mixed flotation and application thereof, wherein the combined collector comprises long-chain xanthate, branched xanthate, thiophosphate or thiophosphinate with the mass ratio of (1-10): 1. Based on the molecular structure-activity relationship of the medicament and the synergistic collecting effect of the combined collecting agents, the combined collecting agents show stronger collecting capacity and better selectivity on the surfaces of lead and silver minerals through the synergistic collecting effect among the multi-component combined collecting agents, and the flotation performance of the combined collecting agents is obviously superior to that of a single collecting agent or the existing traditional lead and silver mineral flotation collecting agents. The collector is particularly suitable for a sulfur-oxygen mixed flotation process of lead-silver oxide ores, can effectively improve the recovery rate of lead and silver metals in complex lead-silver oxide ores, and has good industrial application prospect.

Inventors

• ZHANG CHENYANG
• ZHANG HONGLIANG
• TANG ZHIPENG
• RAO XIN
• YU HENG
• SUN WEI

Assignees

• 中南大学
• 新疆工业学院

Dates

Publication Date

20260505

Application Date

20260327

Claims (9)

1. 1. A combined collector for lead and silver oxide ore sulfur-oxygen mixed flotation is characterized by comprising (1-10) long-chain xanthate, branched xanthate, thiophosphate or thiophosphinate with the mass ratio of (1-10) to (1-10).
2. 2. The combined collector of claim 1 wherein the mass ratio of long chain xanthate to branched xanthate is 1:1.
3. 3. The combined collector of claim 1 wherein the long chain xanthate is a linear xanthate having a carbon chain length of greater than or equal to 2.
4. 4. A combined collector as claimed in claim 3 wherein the long chain xanthate is n-butyl sodium xanthate, n-amyl sodium xanthate or n-propyl sodium xanthate.
5. 5. The combined collector of claim 1, wherein the branched xanthate is a branched xanthate having a main carbon chain length of 3 or more and a branched number of 1 or more.
6. 6. The combined collector of claim 5 wherein the branched xanthate is isopentyl xanthate, isobutyl xanthate or isohexyl xanthate.
7. 7. The combined collector as claimed in claim 1, wherein, the thiophosphate is one of diisopropyl dithiophosphate sodium, diisobutyl dithiophosphate sodium and di-n-butyl dithiophosphate sodium, the thiophosphinate is a di-phosphonate sodium isopropylthiophosphinate sodium diisobutylthiophosphinate or sodium di-n-butylthiophosphinate.
8. 8. Use of a combined collector as claimed in any one of claims 1 to 7 in lead and silver oxide ore sulfur-oxygen mixed flotation.
9. 9. The use of claim 8, wherein the combined collector is used in an amount of 100-200 g/t.

Description

Combined collector for lead oxide silver ore sulfur-oxygen mixed flotation and application thereof Technical Field The invention relates to mineral flotation, in particular to a combined collector for lead oxide silver ore sulfur-oxygen mixed flotation and application thereof. Background With the increasing exhaustion of single metal resources which are easy to process, complex lead-silver multi-metal ores become important sources for obtaining lead and silver metals. In China, lead zinc ore is a main carrier associated with silver, and more than 60% of silver resources are reserved in the ore deposit. In the flotation practice of such minerals, the recovery of silver together is often required due to the close nature of lead and silver, and the higher value of silver in lead concentrate than in zinc concentrate. Flotation is used as a main method for separating lead and silver ores, the separation effect directly determines the recovery efficiency of silver, and the performance of a collector is a core factor influencing the flotation effect. However, with the aggravation of the tendency of 'lean, fine and hybrid' of mineral resources, the development of low-grade complex refractory ore dressing has become a necessary trend, the efficient flotation of oxidized ore has become a worldwide difficult problem, and the traditional flotation process and medicament system have difficulty in meeting the requirements of efficient development and utilization of the current resources. In existing flotation systems, collector performance is a key factor in determining the effectiveness of the separation. Traditional collectors such as xanthates and black agents, although technically mature and low cost, have poor selectivity for silver minerals. A large number of lead-silver ore industrial flotation practices and lead-silver ore flotation related paper researches show that the conventional single collector represented by butyl xanthate is difficult to realize efficient enrichment of silver minerals, and more than 20% or even 30% of silver is always lost in tailings, so that the comprehensive recovery and utilization of the resources of lead-zinc ores containing associated silver become a key problem of lead-silver ore flotation. The key technical bottlenecks faced by the current lead-silver ore flotation are mainly characterized in that the surface properties of silver minerals are similar to those of associated gangue minerals, the selective recognition capability of the existing collector is insufficient, the collection efficiency of the micro-fine silver minerals is low, and the adaptability of the traditional medicament system to complex ores is limited. These factors severely restrict the comprehensive utilization efficiency of lead and silver resources. Thus, the performance defect of the existing collector has become a key factor for restricting the improvement of the silver recovery rate. The common anion collecting agents for the actual flotation of lead and silver ores, such as xanthate and black powder, have limited adsorption capacity on lead oxide ores, need to rely on high-dose sodium sulfide for pre-vulcanization, and can also face the key problems of uneven vulcanization, over-vulcanization, serious ore slime consumption medicament, large pollution of mineral dressing wastewater and the like in actual production. Combined collector synergy is considered an effective way of enhancing flotation. Although certain application exists, the specific action mechanism, especially the scientific nature of realizing selective adsorption and strengthening through coordination regulation at the molecular/atomic level is not clear, and the rational design and process optimization of high-efficiency medicaments are limited. The lead-silver oxide ore flotation can be classified into a preferential flotation process and a mixed flotation process. The preferential flotation process is to firstly collect sulphide ore and then vulcanize oxidized ore by using a vulcanizing agent, and the flotation system has more defects and defects such as long flotation flow, large equipment quantity, large power consumption, large medicament consumption, large influence of the fluctuation of the properties of the raw ore on the product quality and the like. The sulfur-oxygen mixed flotation process synchronously captures the sulfide phase and the oxide phase in the lead-silver oxide ore, has the advantages of shorter process flow, less equipment quantity and the like, but the existing traditional collector has poor flotation performance in the sulfur-oxygen mixed flotation process. Based on the structure-activity relationship of the medicament molecules and the cooperative coordination collecting principle of the combined collector molecules, a combined collector which is applicable to a sulfur-oxygen mixed flotation system, has strong collecting capacity and good selectivity is developed, the performance limitation of the traditional si