CN101658816A

CN101658816A - Mineral separating process for electively recovering tantalum-niobium ores

Info

Publication number: CN101658816A
Application number: CN200910186049A
Authority: CN
Inventors: 肖春莲; 雷存友; 袁国才; 陈小爱; 张阳; 章晋叔; 李春林
Original assignee: China Nerin Engineering Co Ltd
Current assignee: China ruim engineering technology Limited by Share Ltd
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2010-03-03
Anticipated expiration: 2029-09-16
Also published as: CN101658816B

Abstract

The invention relates to a mineral separating process for electively recovering tantalum-niobium ores; in the process, the crushed ores produce tantalum-niobium ores finally after the steps of stage grinding, stage sorting, mud-sand separation, and respectively processing primary mud and secondary mud; the process adopts stage grinding and stage sorting and avoids over-crushing phenomenon of the tantalum-niobium ores; the mud-sand separation and respectively processing of the primary mud and secondary mud avoid interference of coarse grain material to the separation of fine-graded useful mineral; as ore grinding produces a great amount of secondary ferrite, the interference of iron with large specific gravity to the separation of the tantalum-niobium useful mineral can be avoided by magnetic separation and impurity removal, thereby achieving the purpose of improving the tantalum-niobium concentrate grade and tantalum-niobium ore-separation recovery percentage. Under the condition thatmain useful elements-tantalum and niobium has high dispersion coefficient, the tantalum-niobium recovery rate can reach 50 percent, and the recovery rate of the recyclable part of tantalum and niobiumcan reach 65-75 percent.

Description

A kind of ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone

Technical field

The present invention relates to the ore-dressing technique of crisp, easy argillization of a kind of effectively recovery property and the thin mineral of disseminated grain size, relate in particular to a kind of ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone.

Background technology

Because the tantalum metal has good heat conduction, conduction, decay resistance, its ductility is good, fusing point is high, chemical stability reaches some other special nature well, makes it industrial being widely used such as metallurgy, electronics, chemical industry, Aero-Space.The demand of world's tantalum powder, tantalum wire is approximately with 10% speed cumulative year after year.China belongs to poor tantalum state, and tantalum-niobium concentrate (Ta is produced in present domestic mine per year ₂O ₅) about 125 tons, and domestic niobium minerals independently not at present, the production of its niobium is association output from tantalum ore just.Domestic tantalum-niobium smelt enterprise and Ta product output are amounted to into about 800 tons of metal tantalum, and from external import, and the breach of niobium is bigger more than 90% for its raw material.The tantalum niobium is as China's important strategic resource, and country lists it in " resource of incentive exploitation "; Tantalum niobium concentrate stone is frangible, and for fine size, tantalum niobium concentrate stone that grade is low, how effectively to reclaim is a great problem, therefore, is necessary to invent a kind of ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone.

Summary of the invention

The purpose of this invention is to provide a kind of ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone, can improve tantalum-niobium concentrate grade and tantalum niobium recovery rate in ore-dressing index, solve effective recovery problem of frangible, fine size, tantalum niobium concentrate stone that grade is low.

The ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone of the present invention, the characteristics frangible according to tantalum niobium concentrate stone, for fine size, tantalum niobium concentrate stone that grade is low, the technological process output tantalum-niobium concentrate that adopts stage grinding, stage grading, mud-sand separation, magnetic separation removal of impurities, primary mud and secondary mud to handle respectively the product behind the muck.Under the high situation of the dispersion rate of main useful element tantalum, niobium, the tantalum niobium rate of recovery is reached about 50%, make the rate of recovery of the recyclable part of tantalum niobium reach 65%～75%.

The ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone of the present invention, technical characterstic is: adopt stage grinding, stage grading, avoided the mistake crushing phenomenon of tantalum niobium concentrate thing; Adopt mud-sand separation, primary mud and secondary mud to handle the interference of having avoided coarse-grained material that the fine fraction valuable mineral is sorted respectively; Because ore grinding produces a large amount of inferior pig iron, by the magnetic separation removal of impurities, the interference that can avoid the bigger irony of proportion that valuable mineral tantalum niobium is sorted, thus reach the purpose that improves tantalum-niobium concentrate grade and tantalum niobium recovery rate in ore-dressing.

Description of drawings

Fig. 1 is the mineral processing circuit figure that can effectively reclaim tantalum niobium valuable mineral of the present invention.

The specific embodiment

The ore-dressing technique that can effectively reclaim tantalum niobium concentrate stone of the present invention, specific implementation process is as follows:

Raw ore with the granularity that the removes primary thin mud for-0.2mm, is sent into primary thin bricklayer's section to handle separately after washup, and primary mud sorts mine tailing and dewaters through spiral classifier, and sand return enters mill heavy industry section and handles, and the spiral classifier overflow is advanced to spread the cloth chute and sorted.Wash the back ore through three section one closed circuit crushing, the muck product enters mill heavy industry section, primary grinding constitutes closed circuit by rod mill and high frequency vibrating fine screen, the ore milling product granularity is-0.5mm, enter the spiral classifier classification after the ore milling product deironing, its sand return enters one section coarse fraction and sorts system, output tantalum-niobium concentrate and mine tailing; One section sorts mine tailing sand return after spiral classifier concentrates and enters secondary grinding, the overflow of spiral classifier and one section spiral classifier overflow merge through cyclone slough-the 0.038mm material after separately selected output tantalum-niobium concentrate and mine tailing, overflow-0.038mm material enters secondary thin mud and sorts system.Secondary grinding is made of closed circuit ball mill and high frequency fine screen, the secondary grinding product granularity is-0.2mm; The deironing of secondary grinding product after cyclone classification output-0.2+0.038mm ,-two grades of 0.038mm ,-0.2+0.038mm grade material enters two sections and sorts system, output tantalum-niobium concentrate and mine tailing;-0.038mm grade material enters secondary thin mud system, sorts output tantalum-niobium concentrate and mine tailing through dewater laggard shop cloth chute, shaking table of concentrator.

Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make some alternative or obvious modification that are equal to without departing from the inventive concept of the premise; and performance or purposes are identical, then should be considered as belonging to the protection domain that the present invention is determined by claims of being submitted to.

Claims

1, a kind of ore-dressing technique that can effectively reclaim tantalum niobium valuable mineral is characterized in that: the product of this technology after with muck handled the final tantalum-niobium concentrate of output respectively through stage grinding, stage grading, mud-sand separation, magnetic separation removal of impurities, primary mud and secondary mud.

2, the ore-dressing technique that can effectively reclaim tantalum niobium valuable mineral according to claim 1, it is characterized in that: raw ore after washup with the granularity that removes is-the primary thin mud of 0.2mm, sending into primary thin bricklayer's section handles separately, primary mud sorts mine tailing and dewaters through spiral classifier, sand return enters mill heavy industry section and handles, and overflow is advanced to spread the cloth chute and sorted; Wash the back ore through three section one closed circuit crushing, the muck product enters mill heavy industry section, primary grinding constitutes closed circuit by rod mill and high frequency vibrating fine screen, the ore milling product granularity is-0.5mm, enter the spiral classifier classification after the ore milling product deironing, its sand return enters one section coarse fraction and sorts system, output tantalum-niobium concentrate and mine tailing; One section sorts mine tailing sand return after spiral classifier is dense and enters secondary grinding, the overflow of spiral classifier and one section spiral classifier overflow merge through cyclone slough-0.038mm grade material after separately selected output tantalum-niobium concentrate and mine tailing, overflow-0.038mm grade material enters secondary thin mud and sorts system; Secondary grinding is made of closed circuit ball mill and high frequency fine screen, the secondary grinding product granularity is-0.2mm; The deironing of secondary grinding product after cyclone classification output-0.2+0.038mm ,-two grades of 0.038mm ,-0.2+0.038mm grade material enters two sections and sorts system, output tantalum-niobium concentrate and mine tailing;-0.038mm grade material enters secondary thin mud system, sorts output tantalum-niobium concentrate and mine tailing through dewater laggard shop cloth chute, shaking table of concentrator.