CN-118237159-B - Carbon sludge inhibitor and efficient beneficiation method using same

Abstract

The invention discloses a carbon sludge inhibitor and a high-efficiency beneficiation method, which comprise the following raw materials: dextrin, guar gum, hydroxyethyl cellulose, polysorbate 80. The method has the advantages that the content of lead and zinc in the removed carbon sludge is lower, the recovery rate of lead and zinc in the lead and zinc concentrate is higher, the beneficiation index is better, the carbon sludge affecting lead and zinc flotation is removed, and meanwhile, the loss of lead and zinc in the carbon sludge is reduced.

Inventors

• DING PENG
• ZHANG CHI
• LAN QINGTAO
• WANG ZHOUHE
• PENG SHIZHONG
• PANG BO
• GUO YUNXIN
• JIANG NING
• ZHANG QUNYING

Assignees

• 安徽铜冠产业技术研究院有限责任公司

Dates

Publication Date

20260505

Application Date

20240403

Claims (4)

1. 1. An efficient beneficiation method utilizing a carbon sludge inhibitor, comprising the following steps: S1, grinding a raw ore of lead-zinc ore containing carbon mud into ore pulp; S2, adding kerosene or diesel oil into ore pulp, pulping for 2-5 min, adding No. 2 oil or MIBC, pulping for 2-5 min, performing aerated flotation to obtain carbon slime roughing concentrate and decarburized roughing tailings, and performing decarburization scavenging on the decarburized roughing tailings to obtain decarburized scavenging concentrate and decarburized scavenging tailings; S3, combining the carbon slime rough concentration concentrate and the carbon slime scavenging concentrate into carbon slime concentrate, adding a carbon slime inhibitor into the carbon slime concentrate, pulping for 2-5min, adding sulfur and nitrogen, pulping for 2-5min, and performing air flotation to obtain lead rough concentration concentrate and lead rough concentration tailings; s4, carrying out primary concentration on the lead roughing concentrate to obtain lead concentrate 1 and lead concentration middlings, combining the lead concentration middlings and lead roughing tailings, adding a carbon mud inhibitor, pulping for 2-5min, adding copper sulfate, pulping for 2-5min, adding butyl xanthate, pulping for 2-5min, and carrying out aerated flotation to obtain zinc roughing concentrate and zinc roughing tailings; S5, carrying out primary concentration on the zinc rough concentrate to obtain zinc concentrate 1 and zinc concentrate middlings, and finally merging the zinc concentrate middlings and the zinc rough tailings to be discharged as carbon sludge; S6, carrying out lead flotation and zinc flotation on the decarburized tailings, and respectively returning lead concentrate 1 and zinc concentrate 1 obtained from the carbon sludge concentrate to lead concentration operation and zinc concentration operation to finally obtain lead concentrate and zinc concentrate; The carbon sludge inhibitor is prepared by uniformly mixing 50-60 parts of dextrin, 25-20 parts of guar gum, 20-15 parts of hydroxyethyl cellulose and 5 parts of polysorbate 80 according to the following proportion.
2. 2. The high-efficiency beneficiation method according to claim 1, wherein in the step S2, the addition amount of kerosene or diesel oil is 32-150g/t, and the addition amount of 2# oil or MIBC is 32-64g/t.
3. 3. The high-efficiency beneficiation method according to claim 1, wherein in the step S3, the addition amount of the carbon sludge inhibitor is 50-200 g/t, and the addition amount of sulfur and nitrogen is 10-80 g/t.
4. 4. The high-efficiency beneficiation method according to claim 1, wherein in the step S4, the addition amount of the carbon sludge inhibitor is 50-200 g/t, the addition amount of the copper sulfate is 50-200 g/t, and the addition amount of the butyl xanthate is 50-100 g/t.

Description

Carbon sludge inhibitor and efficient beneficiation method using same Technical Field The invention relates to a lead-zinc ore beneficiation method, in particular to a high-efficiency beneficiation method for lead-zinc ores containing carbon and mud and application thereof, belonging to the field of nonferrous metal ore beneficiation. Background The lead zinc metal is widely applied to various fields of national economy and is an important strategic metal in China. In recent years, with the development of national economy, the demand for lead-zinc metal is increasing, and high-quality lead-zinc resources are less and less, so that the efficient utilization of carbon-containing mud lead-zinc resources with high utilization difficulty is more and more important. The carbon-containing mud lead zinc ore is generally high in carbon content. The differences in floatability of the carbonaceous materials are larger due to different carbonization degrees, and the carbonaceous materials, useful minerals and gangue minerals are closely connected, meanwhile, the carbonaceous mud lead-zinc ore is contained, the granularity of the embedded cloth is generally finer, the symbiotic relationship of the minerals is close, and the structure is complex. The existence of the carbonaceous causes large consumption of the medicament in the lead-zinc flotation process, and the carbonaceous is easy to enter the concentrate product, so that the concentrate grade is low, and the requirement of a qualified product is difficult to reach. Fine embedding granularity leads to extremely fine grinding fineness of lead-zinc ore containing carbon mud, and a large amount of easily-slimed minerals contained in the lead-zinc ore containing fine embedding granularity cause the sliming phenomenon, cause serious interference on lead-zinc flotation, cause unstable ore dressing operation and finally have unsatisfactory indexes. At present, carbon sludge-containing lead-zinc ores generally eliminate the influence of carbon sludge on lead-zinc flotation in the following three ways. Firstly, decarburizing in advance, and then performing lead-zinc flotation, namely, before lead-zinc flotation, adding a proper amount of foaming agent or hydrocarbon oil to make carbon sludge float out in advance. The method can completely eliminate the influence of the carbon sludge on the lead-zinc flotation, and lead-zinc flotation indexes are stable, but lead-zinc loss in the carbon sludge is larger. Secondly, carbon and lead are mixed and floated to obtain carbon and lead concentrate, and then carbon and lead separation is carried out by adopting lead-suppressing floating carbon or adopting a carbon-suppressing floating mode according to the floatability difference of carbon mud and galena. The method avoids the defect of larger lead-zinc loss rate in the pre-decarburization process, but puts higher requirements on carbon-lead separation operation, and currently, the application of the high-efficiency environment-friendly inhibitor for the carbon slime minerals or galena is less. Thirdly, the method is also completely dependent on an efficient inhibitor of carbon sludge, is suitable for carbon sludge with poor floatability and lead-zinc ores with low carbon content, but has unstable flotation process and unsatisfactory mineral separation index when the carbon sludge with high floatability is obtained, and is widely applied to industrial production of carbon sludge lead-zinc ores only by adopting a pre-decarbonizing sludge method at present, but has large lead-zinc metal quantity lost in the carbon sludge removed in advance, thereby not only causing resource waste, but also reducing the economic benefit of mines. Disclosure of Invention Aiming at the defects of the prior pre-decarburization technology, one of the purposes of the invention is to provide a high-efficiency beneficiation method for the lead-zinc ore containing carbon mud, so as to reduce the loss of lead-zinc metal in the carbon mud while effectively removing the carbon mud, improve the utilization rate of lead-zinc resources and improve the economic benefit of lead-zinc mines. The invention adopts the technical scheme that the carbon sludge inhibitor comprises the following raw materials of dextrin, guar gum, hydroxyethyl cellulose and polysorbate 80. The carbon mud minerals are mainly carbonaceous gangue and sericite, and are easy to mud in ore pulp. In the invention, the molecules such as dextrin, guar gum, hydroxyethyl cellulose and the like are easy to adsorb on the surface of the carbon sludge mineral, and as the carbon sludge inhibitor has larger molecular weight and contains a large number of hydroxyl groups, the hydrophilicity is better, and the carbon sludge inhibitor is hydrophilic after being adsorbed on the surface of the carbon sludge mineral, thereby realizing the inhibition of the carbon sludge mineral. Polysorbate 80 may dissolve foaming agents or hydrocarbon molecules adsorbed on the surface