CN104226463A - Beneficiation method for high-tin-content multi-metal sulfide ores - Google Patents
Beneficiation method for high-tin-content multi-metal sulfide ores Download PDFInfo
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Abstract
The invention relates to a beneficiation method for high-tin-content multi-metal sulfide ores, and belongs to the technical field of ore processing engineering. The high-tin-content multi-metal sulfide ores are subjected to rod milling ore discharging and hydraulic cyclone grading to obtain overflow and setting sand, the overflow enters copper lead for mixed flotation, the setting sand is subjected to high-frequency vibration fine sieving and is graded again, and undersize products after the hydraulic cyclone overflowing and the high-frequency vibration fine sieving grading are merged into ore milling products containing 60 percent of particles with the granularity being smaller than 0.074mm, and the ore milling products enter flotation operation; the ore grinding products are subjected to flotation, magnetic separation and reselection in steps, and then, lead concentrates, copper concentrates, zinc concentrates, pyrrhotites, low-arsenic-content sulfur concentrate, high-grade tin concentrates, tin concentrates and rich-tin middlings are respectively produced. The beneficiation method provided by the invention has the advantages that the tin ores can be recovered to the maximum degree, meanwhile, the recovery of all valuable metal sulfide ores can be considered, the valuable minerals in the ores are recovered to the maximum degree, and the integral recovery and utilization rate of ore resources is improved.
Description
Technical field
The present invention relates to a kind of beneficiation method of high tin-polymetallic sulphide ore, belong to Mineral Processing Engineering technical field.
Background technology
China's stanniferous sulfide ore tin mineral disseminated grain size thickness is uneven, and tin mineral character is very crisp very easily to be formed sludge and cannot reclaim in grinding process.This method just requiring that grind grading process adopts selective corase grind, high-effective classifying, coarse grain to regrind avoids cassiterite to cross pulverizing as much as possible, simultaneously to primary tin ore mud and cannot avoid produce sludge adopt method for floating can effectively reclaim.
The ore dressing of current stannum-contained multi-metal sulphide ore based on floating-heavily to combine, the technique of an ore grinding, grind grading adopts traditional grinding grading technique, adopt steel ball mill ore grinding, obtain the product that below 0.074mm accounts for more than 70% granularity and be beneficial to flotation and recovery of copper, lead, zinc sulfides, flotation tailing adopts reselecting method to reclaim tin mineral.This technique has that flow process is simple, flotation recovery rate is high, be easy to the advantage that operates, but also there is following problem: (1) ore milling product size distribution is uneven, and coarse fraction is many with ultra-fine grade sludge, and the mineral that density is large exist the serious problem crossing pulverizing; (2) the tin mineral rate of recovery is low, and Fine cassiterite reclaims without effective ways; (3) sulfide ore that copper-lead Zn content is high, Theil indices is low is only applicable to.
Summary of the invention
For above-mentioned prior art Problems existing and deficiency, the invention provides a kind of beneficiation method of high tin-polymetallic sulphide ore.The high tin-polymetallic sulphide ore grinding particle size of routine is that below 0.074mm accounts for more than 70% by this beneficiation method, becoming grinding particle size is the selective milling that below 0.074mm accounts for 60%, therefore can reclaim cassiterite wherein and sulfide to greatest extent, the present invention is achieved through the following technical solutions.
A beneficiation method for high tin-polymetallic sulphide ore, its concrete steps are as follows:
Step 1: first by high tin-polymetallic sulphide ore crushing raw ore to 15 ~ below 20mm granularity, then the high tin-polymetallic sulphide ore after fragmentation is entered rod mill open-circuit grinding, rod milling ore discharge obtains overflow and sand setting through hydroclone classification, overflow enters into copper-lead bulk flotation, sand setting is through high frequency vibrating fine screen classification again, oversize enters overflow shaped steel forging ball mill and regrinds, undersize enters copper-lead bulk flotation, steel forging ball mill ore discharging product and rod mill ore discharge merge to be got back to hydrocyclone and forms closed circuit classification, wherein the undersize of hydrocyclone overflow and high frequency vibrating fine screen classification merges that to obtain granularity be that the ore milling product that below 0.074mm accounts for 60% enters flotation operation,
Step 2: the ore milling product that step 1 obtains enters copper-lead bulk flotation, flotation chats enters and continues through copper-lead bulk flotation after small grinder is regrinded and select, and the Copper-lead mixed concentrate of output adopts two sections of shaking tables to carry out separation and obtains lead concentrate, copper concentrate and copper-lead flotation tailing; The copper-lead flotation tailing of output carries out zinc flotation output zinc concentrate, zinc chats and zinc mine tailing, roughly selects the zinc chats obtained and adopts vertical mixing mill regrinding and reconcentration output zinc concentrate;
Step 3: magnetic iron ore is selected by the zinc mine tailing that step 2 obtains after magnetic separation, then sulphur arsenic bulk concentrate and sulfur-bearing 4wt.% desulfurization mine tailing is obtained after, desulfurization flotation concentrated through concentrator successively, sulphur arsenic bulk concentrate obtains containing arsenic lower than 0.5wt.% low pozzuolite concentrate and high arsenic mine tailing after sulphur arsenic separating flotation, desulfurization mine tailing adopts three sections of shaking tables to select the thicker high-grade Tin concentrate of granularity, selects high-grade Tin concentrate after the middling ore regrinding that shaking table is selected through after backwashing shaking table; Shaking table mine tailing out adopts spiral classifier and large tilting plate board concentrating box multi-stage PCE, and coarse fraction is for abandoning mine tailing; Granularity is that the middle grade of 10 ~ 40 μm adopts and outstandingly shakes that conical surface Disk Concentrator is roughly selected, table concentration output Tin concentrate; Fine fraction concentrates through small-bore hydrocyclone sand setting and the overflow that classification output concentration is 25%, sand setting adopts the rich chats of tin flotation (adopting the collectors for cassiterite flotation of BY-9 and P86) output tin, and overflow adopts the recovery of large area blanket sluice, the rich chats of the selected output tin of belt shaking table.
Described high tin-polymetallic sulphide ore is stanniferous higher, and based on tin ash, grade reaches 0.5 ~ 1wt.%.
High frequency vibrating fine screen screen size in described step 1 is 0.2 ~ 0.3mm.
When Copper-lead mixed concentrate in described step 2 adopts shaking table separating technology, cupric 11 ~ 15wt.% in Copper-lead mixed concentrate, plumbous grade 5 ~ 15wt.%.
Sulphur arsenic bulk concentrate ore deposit in described step 3 adopts medicament to suppress arsenic mineral through sulphur arsenic separating flotation, as the medicaments such as sodium humate, hydrogen peroxide, waterglass suppress arsenic mineral.
In described step 3, shaking table mine tailing is out classified, concentrated again carries out sorting of the distinct methods of narrow grade, the grind grading method adopted can overcome crisp easy mistake of tin ore physical property and pulverizes and produce too much sludge, and the sludge being difficult to avoid is adopted to the method for efficient tin-lead soldering and blanket sluice, realize the wholegrain level high efficiente callback of tin mineral.
The present invention selects high tin-polymetallic sulphide ore granularity to be that below 0.074mm accounts for 60% for the principle sorting material and is: make to sort material through two stage grinding two sections of classifications and fully dissociate and only powder, good effect is obtained with various metals, particularly tin such as flotation gravity treatment integrated processes comprehensive recovery of lead zinc-copper tin.
The invention has the beneficial effects as follows: (1) high tin-polymetallic sulphide ore avoided pulverizing as far as possible in grinding process, adopt method for floating to reclaim to the sludge that primary slime and part are difficult to avoid producing simultaneously, tin mineral can be reclaimed to greatest extent, simultaneously all have the recovery of valency metal sulphide mineral to be taken into account, valuable mineral in ore is reclaimed to greatest extent, improves mineral resources comprehensive reutilization rate; (2) Tin concentrate of output becomes high-grade Tin concentrate and low-grade rich chats from original Tin concentrate, and the tin rate of recovery improves more than 20%, and copper recovery improves more than 2%, and plumbous zinc recovery remains on previous level substantially, and sulfur recovery rate reaches 90%.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
Carry out ore dressing for the high tin-polymetallic sulphide ore in Yunnan, the stanniferous sulphide ore in this Yunnan comprises following mass percent component: tin 0.56wt.%, copper 0.24wt.wt.%, plumbous 0.15wt.%, zinc 0.91wt.%, sulphur 19.56wt.%, cassiterite 0.54wt.%, stannite 0.05wt.%, chalcopyrite 0.62wt.%, high-iron sphalerite 0.72wt.%, magnetic iron ore 51.04wt.%, siderite 1.66wt.%, quartzy 8.43wt.%, carbonate mineral 7.62wt.%, biotite are 6.93wt.%, chlorite 3.87wt.%.
As shown in Figure 1, the beneficiation method of this high tin-polymetallic sulphide ore, its concrete steps are as follows:
Step 1: first by high tin-polymetallic sulphide ore crushing raw ore to 15 ~ below 20mm granularity, then the high tin-polymetallic sulphide ore after fragmentation is entered rod mill open-circuit grinding, rod milling ore discharge obtains overflow and sand setting through hydroclone classification, overflow enters into copper-lead bulk flotation, sand setting is through high frequency vibrating fine screen classification again, oversize enters overflow shaped steel forging ball mill and regrinds, undersize enters copper-lead bulk flotation, steel forging ball mill ore discharging product and rod mill ore discharge merge to be got back to hydrocyclone and forms closed circuit classification, wherein the undersize of hydrocyclone overflow and high frequency vibrating fine screen classification merges that to obtain granularity be that the ore milling product that below 0.074mm accounts for 60% enters flotation operation, wherein high frequency vibrating fine screen screen size is 0.2 ~ 0.3mm.；
Step 2: the ore milling product that step 1 obtains enters copper-lead bulk flotation, flotation chats enters and continues through copper-lead bulk flotation after small grinder is regrinded and select, and the Copper-lead mixed concentrate of output adopts two sections of shaking tables to carry out separation and obtains lead concentrate, copper concentrate and copper-lead flotation tailing; The copper-lead flotation tailing of output carries out zinc flotation output zinc concentrate, zinc chats and zinc mine tailing, roughly selects the zinc chats obtained and adopts vertical mixing mill regrinding and reconcentration output zinc concentrate; Wherein cupric 11 ~ 12wt.% in Copper-lead mixed concentrate, plumbous grade 5 ~ 10wt.%.；
Step 3: magnetic iron ore is selected by the zinc mine tailing that step 2 obtains after magnetic separation, then sulphur arsenic bulk concentrate and sulfur-bearing 4wt.% desulfurization mine tailing is obtained after, desulfurization flotation concentrated through concentrator successively, sulphur arsenic bulk concentrate obtains containing arsenic lower than 0.5wt.% low pozzuolite concentrate and high arsenic mine tailing after sulphur arsenic separating flotation, desulfurization mine tailing adopts three sections of shaking tables to select the thicker high-grade Tin concentrate of granularity, selects high-grade Tin concentrate after the middling ore regrinding that shaking table is selected through after backwashing shaking table; Shaking table mine tailing out adopts spiral classifier and large tilting plate board concentrating box multi-stage PCE, and coarse fraction is for abandoning mine tailing; Granularity is that the middle grade of 10 ~ 40 μm adopts and outstandingly shakes that conical surface Disk Concentrator is roughly selected, table concentration output Tin concentrate; Fine fraction concentrates through small-bore hydrocyclone sand setting and the overflow that classification output concentration is 25%, sand setting adopts the rich chats of tin flotation (adopting the collectors for cassiterite flotation of BY-9 and P86) output tin, and overflow adopts the recovery of large area blanket sluice, the rich chats of the selected output tin of belt shaking table.
The stanniferous sulphide ore in this Yunnan adopt former technological process grind grading for for two section two closed circuit, classifying equipoment is spiral classifier and hydrocyclone, milling medium is steel ball, grinding particle size-0.074mm accounts for 70%, former technological process copper-lead zinc floatation indicators is better, but the tin rate of recovery only 50.3wt.%, Tin concentrate grade is 35wt.%.
Adopt beneficiation method output high-grade Tin concentrate 35wt.% of the present invention, the stanniferous 3.5wt.% of low-grade rich chats two kinds of products, the tin rate of recovery reaches 72.5%, improves 22.2%.Copper recovery has brought up to 77.5% by 75%, and plumbous zinc recovery remains on previous level substantially, and sulfur recovery rate reaches 90%, greatly improves the economic benefit of resource utilization and enterprise.
Embodiment 2
Ore dressing is carried out for the high tin-polymetallic sulphide ore in Guangxi, this Guangxi high tin-polymetallic sulphide ore comprises following mass percent component: tin 0.73wt.%, plumbous 0.79wt.%, zinc 1.5wt.%, sulphur 18.2wt.%, raw ore cassiterite disseminated grain size between 8 ~ 180 microns, be crushed to less than 3 millimeters dissociation degree reach more than 90% containing tin particles tin metal distribution reach 90%.
As shown in Figure 1, the beneficiation method of this high tin-polymetallic sulphide ore, its concrete steps are as follows:
Step 1: first by high tin-polymetallic sulphide ore crushing raw ore to 15 ~ below 20mm granularity, then the high tin-polymetallic sulphide ore after fragmentation is entered rod mill open-circuit grinding, rod milling ore discharge obtains overflow and sand setting through hydroclone classification, overflow enters into copper-lead bulk flotation, sand setting is through high frequency vibrating fine screen classification again, oversize enters overflow shaped steel forging ball mill and regrinds, undersize enters copper-lead bulk flotation, steel forging ball mill ore discharging product and rod mill ore discharge merge to be got back to hydrocyclone and forms closed circuit classification, wherein the undersize of hydrocyclone overflow and high frequency vibrating fine screen classification merges that to obtain granularity be that the ore milling product that below 0.074mm accounts for 60% enters flotation operation, wherein high frequency vibrating fine screen screen size is 0.2 ~ 0.3mm.；
Step 2: the ore milling product that step 1 obtains enters copper-lead bulk flotation, flotation chats enters and continues through copper-lead bulk flotation after small grinder is regrinded and select, and the Copper-lead mixed concentrate of output adopts two sections of shaking tables to carry out separation and obtains lead concentrate, copper concentrate and copper-lead flotation tailing; The copper-lead flotation tailing of output carries out zinc flotation and obtains zinc concentrate, zinc chats and zinc mine tailing, roughly selects the zinc chats obtained and adopts vertical mixing mill regrinding and reconcentration output zinc concentrate, wherein cupric 12 ~ 15wt.% in Copper-lead mixed concentrate, plumbous grade 10 ~ 15wt.%.；
Step 3: magnetic iron ore is selected by the zinc mine tailing that step 2 obtains after magnetic separation, then sulphur arsenic bulk concentrate and sulfur-bearing 4wt.% desulfurization mine tailing is obtained after, desulfurization flotation concentrated through concentrator successively, sulphur arsenic bulk concentrate obtains containing arsenic lower than 0.5wt.% low pozzuolite concentrate and high arsenic mine tailing after sulphur arsenic separating flotation, desulfurization mine tailing adopts three sections of shaking tables to select the thicker high-grade Tin concentrate of granularity, selects high-grade Tin concentrate after the middling ore regrinding that shaking table is selected through after backwashing shaking table; Shaking table mine tailing out adopts spiral classifier and large tilting plate board concentrating box multi-stage PCE, and coarse fraction is for abandoning mine tailing; Granularity is that the middle grade of 10 ~ 40 μm adopts and outstandingly shakes that conical surface Disk Concentrator is roughly selected, table concentration output Tin concentrate; Fine fraction concentrates through small-bore hydrocyclone sand setting and the overflow that classification output concentration is 25%, sand setting adopts the rich chats of tin flotation (adopting the collectors for cassiterite flotation of BY-9 and P86) output tin, and overflow adopts the recovery of large area blanket sluice, the rich chats of the selected output tin of belt shaking table.
The employing flotation results of the present invention of this Guangxi high tin-polymetallic sulphide ore is: lead concentrate grade 55wt.%, lead recovery 82%, zinc concentrate grade 43wt.%, zinc recovery 85%, high-grade Tin concentrate 40wt.%, rich chats grade is 3.2wt.%, and the Tin concentrate rate of recovery reaches 75%.
Embodiment 3
Ore dressing is carried out for the high tin-polymetallic sulphide ore in Guangxi, this Guangxi high tin-polymetallic sulphide ore comprises following mass percent component: tin 1.53wt.%, plumbous 0.78wt.%, antimony 0.69wt.%, zinc 2.5wt.%, sulphur 17.2wt.%, raw ore cassiterite disseminated grain size is thicker, between 35-250 micron, be crushed to less than 3 millimeters dissociation degree reach more than 85% containing tin particles tin metal distribution reach 90%.
Be illustrated in figure 1 the beneficiation method of this high tin-polymetallic sulphide ore, its concrete steps are as follows:
Step 1: first by high tin-polymetallic sulphide ore crushing raw ore to 15 ~ below 20mm granularity, then the high tin-polymetallic sulphide ore after fragmentation is entered rod mill open-circuit grinding, rod milling ore discharge obtains overflow and sand setting through hydroclone classification, overflow enters into copper-lead bulk flotation, sand setting is through high frequency vibrating fine screen classification again, oversize enters overflow shaped steel forging ball mill and regrinds, undersize enters copper-lead bulk flotation, steel forging ball mill ore discharging product and rod mill ore discharge merge to be got back to hydrocyclone and forms closed circuit classification, wherein the undersize of hydrocyclone overflow and high frequency vibrating fine screen classification merges that to obtain granularity be that the ore milling product that below 0.074mm accounts for 60% enters flotation operation, wherein high frequency vibrating fine screen screen size is 0.2 ~ 0.3mm.；
Step 2: the ore milling product that step 1 obtains enters copper-lead bulk flotation, flotation chats enters and continues through copper-lead bulk flotation after small grinder is regrinded and select, and the Copper-lead mixed concentrate of output adopts two sections of shaking tables to carry out separation and obtains lead concentrate, copper concentrate and copper-lead flotation tailing; The copper-lead flotation tailing of output carries out zinc flotation and obtains zinc concentrate, zinc chats and zinc mine tailing, roughly selects the zinc chats obtained and adopts vertical mixing mill regrinding and reconcentration output zinc concentrate, wherein cupric 12 ~ 13wt.% in Copper-lead mixed concentrate, plumbous grade 8 ~ 10wt.%.；
Step 3: magnetic iron ore is selected by the zinc mine tailing that step 2 obtains after magnetic separation, then sulphur arsenic bulk concentrate and sulfur-bearing 4wt.% desulfurization mine tailing is obtained after, desulfurization flotation concentrated through concentrator successively, sulphur arsenic bulk concentrate obtains containing arsenic lower than 0.5wt.% low pozzuolite concentrate and high arsenic mine tailing after sulphur arsenic separating flotation, desulfurization mine tailing adopts three sections of shaking tables to select the thicker high-grade Tin concentrate of granularity, selects high-grade Tin concentrate after the middling ore regrinding that shaking table is selected through after backwashing shaking table; Shaking table mine tailing out adopts spiral classifier and large tilting plate board concentrating box multi-stage PCE, and coarse fraction is for abandoning mine tailing; Granularity is that the middle grade of 10 ~ 40 μm adopts and outstandingly shakes that conical surface Disk Concentrator is roughly selected, table concentration output Tin concentrate; Fine fraction concentrates through small-bore hydrocyclone sand setting and the overflow that classification output concentration is 25%, sand setting adopts the rich chats of tin flotation (adopting the collectors for cassiterite flotation of BY-9 and P86) output tin, and overflow adopts the recovery of large area blanket sluice, the rich chats of the selected output tin of belt shaking table.
The employing flotation results of the present invention of this Guangxi high tin-polymetallic sulphide ore is: lead-antimony concentrate grade 61wt.%, plumbous antimony recovery 85%, zinc concentrate grade 42wt.%, zinc recovery 88%, high-grade Tin concentrate 45wt.%, rich chats grade is 3.2wt.%, and the Tin concentrate rate of recovery reaches 85%.
Claims (5)
1. a beneficiation method for high tin-polymetallic sulphide ore, is characterized in that concrete steps are as follows:
Step 1: first by high tin-polymetallic sulphide ore crushing raw ore to 15 ~ below 20mm granularity, then the high tin-polymetallic sulphide ore after fragmentation is entered rod mill open-circuit grinding, rod milling ore discharge obtains overflow and sand setting through hydroclone classification, overflow enters into copper-lead bulk flotation, sand setting is through high frequency vibrating fine screen classification again, oversize enters overflow shaped steel forging ball mill and regrinds, undersize enters copper-lead bulk flotation, steel forging ball mill ore discharging product and rod mill ore discharge merge to be got back to hydrocyclone and forms closed circuit classification, wherein the undersize of hydrocyclone overflow and high frequency vibrating fine screen classification merges that to obtain granularity be that the ore milling product that below 0.074mm accounts for 60% enters flotation operation,
Step 2: the ore milling product that step 1 obtains enters copper-lead bulk flotation, flotation chats enters and continues through copper-lead bulk flotation after small grinder is regrinded and select, and the Copper-lead mixed concentrate of output adopts two sections of shaking tables to carry out separation and obtains lead concentrate, copper concentrate and copper-lead flotation tailing; The copper-lead flotation tailing of output carries out zinc flotation output zinc concentrate, zinc chats and zinc mine tailing, roughly selects the zinc chats obtained and adopts vertical mixing mill regrinding and reconcentration output zinc concentrate;
Step 3: magnetic iron ore is selected by the zinc mine tailing that step 2 obtains after magnetic separation, then sulphur arsenic bulk concentrate and desulfurization mine tailing is obtained after, desulfurization flotation concentrated through concentrator successively, sulphur arsenic bulk concentrate obtains low pozzuolite concentrate and high arsenic mine tailing after sulphur arsenic separating flotation, desulfurization mine tailing adopts three sections of shaking tables to select the thicker high-grade Tin concentrate of granularity, selects high-grade Tin concentrate after the middling ore regrinding that shaking table is selected through after backwashing shaking table; Shaking table mine tailing out adopts spiral classifier and large tilting plate board concentrating box multi-stage PCE, and coarse fraction is for abandoning mine tailing; Granularity is that the middle grade of 10 ~ 40 μm adopts and outstandingly shakes that conical surface Disk Concentrator is roughly selected, table concentration output Tin concentrate; Fine fraction concentrates classification output sand setting and overflow through small-bore hydrocyclone, and sand setting adopts the rich chats of tin flotation output tin, and overflow adopts the recovery of large area blanket sluice, the rich chats of the selected output tin of belt shaking table.
2. the beneficiation method of high tin-polymetallic sulphide ore according to claim 1, is characterized in that: described high tin-polymetallic sulphide ore is stanniferous higher, and based on tin ash, grade reaches 0.5 ~ 1wt.%.
3. the beneficiation method of high tin-polymetallic sulphide ore according to claim 1, is characterized in that: the high frequency vibrating fine screen screen size in described step 1 is 0.2 ~ 0.3mm.
4. the beneficiation method of high tin-polymetallic sulphide ore according to claim 1, is characterized in that: when Copper-lead mixed concentrate in described step 2 adopts shaking table separating technology, cupric 11 ~ 15wt.% in Copper-lead mixed concentrate, plumbous grade 5 ~ 15wt.%.
5. the beneficiation method of high tin-polymetallic sulphide ore according to claim 1, is characterized in that: the sulphur arsenic bulk concentrate ore deposit in described step 3 adopts medicament to suppress arsenic mineral through sulphur arsenic separating flotation.
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