CN103586146B - Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore - Google Patents
Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore Download PDFInfo
- Publication number
- CN103586146B CN103586146B CN201310569249.XA CN201310569249A CN103586146B CN 103586146 B CN103586146 B CN 103586146B CN 201310569249 A CN201310569249 A CN 201310569249A CN 103586146 B CN103586146 B CN 103586146B
- Authority
- CN
- China
- Prior art keywords
- stage
- magnetic
- ore
- concentrate
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012545 processing Methods 0.000 title claims abstract description 23
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 13
- 239000011707 mineral Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 18
- 229910052742 iron Inorganic materials 0.000 title abstract description 9
- 239000012141 concentrate Substances 0.000 claims abstract description 55
- 238000005188 flotation Methods 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 22
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 13
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000003313 weakening effect Effects 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 abstract description 18
- 238000007873 sieving Methods 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 238000010494 dissociation reaction Methods 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052595 hematite Inorganic materials 0.000 description 2
- 239000011019 hematite Substances 0.000 description 2
- 229910001608 iron mineral Inorganic materials 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- RAQDACVRFCEPDA-UHFFFAOYSA-L ferrous carbonate Chemical compound [Fe+2].[O-]C([O-])=O RAQDACVRFCEPDA-UHFFFAOYSA-L 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种处理磁、赤混合矿石的选矿工艺，包括下列步骤：将含磁铁矿与赤褐铁矿的混合矿石破碎后的原矿，经两段连续磨矿后，结合处理磁性矿的单一磁选、细筛再磨工艺，将二次分级旋流器的溢流经两段弱磁选、一段细筛选别后，在较粗磨矿粒度条件下，首先获得一部分筛下合格磁铁精矿产品，另一部分筛上产品再与一段强磁机精矿及二段弱磁机尾矿合并作为中矿一起给入三段磨矿分级作业再磨分级，三次分级旋流器溢流再经三段弱磁和二段强磁选别，再一次抛出细粒合格尾矿，三段弱磁精矿和二段强磁精矿合并为混磁精给入反浮选工艺选别获得合格浮选精矿产品。本发明合理有效处理了磁、赤嵌布粒度不同的混合矿石获得了合格铁精矿产品，经济节能环保。
The invention relates to a beneficiation process for processing magnetic and red mixed ores, which comprises the following steps: crushing the mixed ore containing magnetite and red limonite ore, after two stages of continuous grinding, combined processing of magnetic ore Single magnetic separation and fine sieve regrinding process, after the overflow of the secondary classification cyclone is separated by two stages of weak magnetic separation and one stage of fine sieving, under the condition of relatively coarse grinding particle size, a part of the qualified magnetite under the sieve is firstly obtained. Mineral products, the other part of the sieve product is combined with the concentrate of the first stage of strong magnetic machine and the tailings of the second stage of weak magnetic machine as middle ore, and then sent to the third stage of grinding and classification for regrinding and classification, and the overflow of the third stage cyclone is passed through The three-stage weak magnetic and the second-stage strong magnetic separation, the fine-grained qualified tailings are thrown out again, the third-stage weak-magnetic concentrate and the second-stage high-magnetic concentrate are combined into a mixed magnetic concentrate and fed into the reverse flotation process to obtain qualified Flotation concentrate products. The invention rationally and effectively processes the mixed ores with different magnetic and red inlaid particle sizes to obtain qualified iron ore concentrate products, which is economical, energy-saving and environment-friendly.
Description
技术领域 technical field
本发明属于铁矿石选别技术领域，特别涉及一种处理磁、赤混合矿石的选矿工艺。 The invention belongs to the technical field of iron ore separation, in particular to a mineral separation process for processing magnetic and red mixed ore.
背景技术： Background technology :
由于进口矿石价格的不断攀升, 如何合理的利用我国已有的矿石资源, 对我国钢铁工业具有十分现实而又重大的意义。 Due to the rising price of imported ore, how to make reasonable use of our country's existing ore resources is of great practical and significant significance to my country's iron and steel industry.
有一种主要含磁铁矿与赤褐铁矿的混合矿石，其原矿品位较低，只有30.02%，其中赤褐铁矿含量较多，占全铁含量的50.89%，其次是强磁性磁铁矿，占全铁含量的32.28%，还有占全铁含量11.03%的磁性较弱的假象、半假象赤铁矿，含少量碳酸铁和硅酸铁， S、P有害杂质较少，脉石矿物主要是石英。处理该类磁、赤混合矿石一般采用阶段（或连续）磨矿-粗细分级-重、磁、浮联合工艺流程或阶段（或连续）磨矿-弱磁-强磁-浮选工艺流程。但通过对该混合矿石性质的研究，该混合矿中的强磁性矿物磁铁矿嵌布粒度相对较粗，平均为38微米，而赤褐铁矿的嵌布粒度则相对较细，平均为20微米。对该混合矿石的选别试验研究表明，该矿石采用连续磨矿-粗细分级-重、磁、浮联合工艺流程处理，其粗细分级的粗粒级部分中的赤褐铁矿由于其嵌布粒度较细，铁矿物在较粗粒度下没有达到单体解离，采用原来工艺中的重选设备螺旋溜槽不能获得合格重选精矿产品。 There is a mixed ore mainly containing magnetite and red limonite, the raw ore grade is low, only 30.02%, of which red limonite content is more, accounting for 50.89% of the total iron content, followed by strong magnetic magnetite , accounting for 32.28% of the total iron content, and there are false and semi-magic hematites with weak magnetic properties accounting for 11.03% of the total iron content, containing a small amount of iron carbonate and iron silicate, less harmful impurities of S and P, and gangue minerals Mainly quartz. The processing of such magnetic and red mixed ores generally adopts a stage (or continuous) grinding-coarse and fine classification-heavy, magnetic and flotation joint process or a stage (or continuous) grinding-weak magnetic field-strong magnetic field-flotation process. However, through the research on the properties of the mixed ore, the embedded particle size of the strong magnetic mineral magnetite in the mixed ore is relatively coarse, with an average of 38 microns, while the embedded particle size of red limonite is relatively fine, with an average of 20 microns. Microns. The sorting test of this mixed ore shows that the ore is processed by continuous grinding-coarse and fine classification-gravity, magnetic and floating joint process, and the hematite in the coarse-grained part of the coarse and fine classification is due to its embedded particle size The finer iron minerals do not achieve monomer dissociation under the coarser particle size, and the spiral chute of the gravity separation equipment in the original process cannot obtain qualified gravity separation concentrate products.
对该矿石的磁选管选别试验结果表明，在较粗的磨矿粒度-200目85%条件下，其磁选管精矿即达到62%以上，在磨矿粒度-200目90%条件下，磁选管精矿达到65%以上，即该矿石中的强磁性矿物通过单一的弱磁选工艺即可获得合格的磁选精矿。处理强磁性矿物的工艺通常采用单一磁选或单一磁选、细筛再磨工艺流程，单一磁选、细筛再磨工艺是处理磁铁矿的较先进的经济节能工艺流程。如将该混合矿石的磁性矿部分采用单一磁选、细筛再磨工艺处理，其筛下可获得一部分合格精矿产品，而其筛上产品必须经过再磨再选，但该混合矿石中磁铁矿部分经细筛提质后需再磨再选的筛上产率较少只有12%；同时该混合矿石经弱磁选别后的弱磁尾矿中的赤褐铁矿部分也需进一步细磨才可使其达到铁矿物的单体解离；另外该部分赤褐铁矿部分如单独采用弱磁-强磁-反浮选工艺处理，其反浮选给矿品位较低只有34%，现处理磁、赤混合矿石的反浮选工艺给矿品位都在42%以上。 The magnetic separation test results of the ore show that under the condition of 85% of the coarse grinding particle size -200 mesh, the magnetic separation tube concentrate can reach more than 62%, and under the condition of 90% of the grinding particle size -200 mesh The concentration of the magnetic separation tube can reach more than 65%, that is, the strong magnetic minerals in the ore can obtain qualified magnetic separation concentrate through a single weak magnetic separation process. The process of processing strong magnetic minerals usually adopts single magnetic separation or single magnetic separation, fine sieve regrinding process, single magnetic separation, fine sieve regrinding process is a relatively advanced economical and energy-saving process for processing magnetite. If the magnetic ore part of the mixed ore is processed by a single magnetic separation, fine sieve and regrinding process, a part of qualified concentrate products can be obtained under the sieve, and the products on the sieve must be regrinded and re-selected, but the magnetic ore in the mixed ore The iron ore part needs to be ground and re-selected after fine screening and upgrading, and the yield on the sieve is less than 12%; at the same time, the red limonite part in the weak magnetic tailings after the mixed ore has been separated by weak magnetic separation also needs further processing. Fine grinding can make it achieve the dissociation of iron minerals; in addition, if this part of hematite is treated by weak magnetic-strong magnetic-reverse flotation process alone, the reverse flotation feed grade is as low as 34 %, the ore grade of reverse flotation process for processing magnetic and red mixed ore is above 42%.
发明内容 Contents of the invention
本发明的目的是提供一种可降低再磨能耗，减少浮选药剂用量，实现选矿中早收早抛最优选矿原则，节能降耗，降低选矿成本的处理磁、赤混合矿石的选矿工艺。 The purpose of the present invention is to provide a mineral processing process for processing magnetic and red mixed ores that can reduce regrinding energy consumption, reduce the dosage of flotation agents, realize the principle of early harvest and early throwing of the most optimal ore in mineral processing, save energy and reduce consumption, and reduce mineral processing costs. .
本发明是一种处理磁、赤混合矿石的选矿工艺，其特征在于包括下列步骤： The present invention is a beneficiation process for processing magnetic and red mixed ore, which is characterized in that it comprises the following steps:
a) 将含磁铁矿与赤褐铁矿的混合矿石破碎后的原矿，给入一段球磨机和一次分级旋流器组组成的一次闭路磨矿， 一次分级旋流器的粒度为-200目60%的溢流给入二次分级旋流器组，分级成溢流和沉砂粗细两种物料，将二次分级旋流器组分级的沉砂给入二段球磨机磨矿，二段球磨排矿返回二次分级旋流器组，二次旋流器组分级的溢流粒度达到-200目85%给入两段弱磁机和一段强磁机选别； a) The raw ore after crushing the mixed ore containing magnetite and red limonite is fed into a closed-circuit grinding consisting of a ball mill and a primary classifying cyclone group. The particle size of the primary classifying cyclone is -200 mesh 60 % of the overflow is sent to the secondary classifying cyclone group, which is classified into two kinds of materials: overflow and grit, and the grit classified by the secondary classifying cyclone group is sent to the second stage ball mill for grinding, and the second stage ball mill discharges The ore returns to the secondary classification cyclone group, and the overflow particle size of the secondary cyclone group classification reaches -200 mesh 85%, which is sent to two-stage weak magnetic machine and one-stage strong magnetic machine for separation;
b) 原矿通过两段连续磨矿后，将二次旋流器组分级的溢流通过两段弱磁机选别使得二段弱磁机精矿品位达到该矿入筛品位62%以上的要求， b) After the raw ore passes through the two-stage continuous grinding, the overflow of the secondary cyclone group classification is passed through the two-stage magnetic field weakening machine to make the concentrate grade of the second stage magnetic field weakening machine reach the requirement of more than 62% of the ore's screening grade ,
一段弱磁机精矿给入二段弱磁机选别，二段弱磁精矿达到62%以上；一段弱磁机尾矿给入一段强磁机，抛出产率23%，品位7.5%的强磁尾矿； The concentrate of the first stage of weak magnetic machine is fed into the second stage of weak magnetic machine for separation, and the concentration of the second stage of weak magnetic concentrate reaches more than 62%; the tailings of the first stage of weak magnetic machine are fed into the first stage of strong magnetic machine, with a throwing yield of 23% and a grade of 7.5% strong magnetic tailings;
c) 采用细筛提质，经二段弱磁机选别后的品位达到62%以上的二段弱磁机精矿给入筛孔尺寸为0.10mm的电磁高频振动细筛，电磁高频振动细筛的品位为65.5%以上、产率11%筛下产品为一部分最终精矿产品； c) The fine sieve is used to improve the quality, and the concentrate of the second-stage magnetic field weakening machine with a grade of more than 62% after being sorted by the second-stage magnetic field weakening machine is fed into an electromagnetic high-frequency vibrating fine screen with a screen hole size of 0.10mm. The grade of the vibrating fine sieve is above 65.5%, and the yield is 11%. The products under the sieve are part of the final concentrate products;
d) 中矿合并再磨再选。 d) The middle ore is merged, regrinded and re-selected.
将一段强磁机的精矿、二段弱磁机尾矿以及电磁高频振动细筛粒度为-200目72%的筛上产品这三部分中矿合并一起给入三段球磨机再磨，三段球磨排矿给入三次分级旋流器组，三次分级旋流器组的沉砂返回三段球磨机，三次分级旋流器组的粒度为-200目95%的溢流给入三段弱磁机再选，其三段弱磁机尾矿给入二段强磁机抛尾，进一步抛出产率20.5%、品位11%的细粒合格强磁尾矿，而三段弱磁机精矿和二段强磁机精矿合并品位为43%的混磁精作为反浮选给矿给入反浮选作业。 The concentrated ore of the first-stage strong magnetic machine, the tailings of the second-stage weak magnetic machine and the product on the sieve with a particle size of -200 mesh and 72% of the electromagnetic high-frequency vibrating fine screen are combined and fed into the third-stage ball mill for regrinding. The ore discharge of the first-stage ball mill is fed into the third-stage classifying cyclone group, and the sand settling of the third-stage classifying cyclone group is returned to the third-stage ball mill, and the overflow of the third-stage classifying cyclone group with a particle size of -200 mesh and 95% is fed into the third-stage magnetic field weakening The tailings of the three-stage weak magnetic machine are fed into the second-stage strong magnetic machine for throwing tails, and the fine-grained qualified strong magnetic tailings with a yield of 20.5% and a grade of 11% are further thrown out, while the three-stage weak magnetic machine concentrate The mixed magnetic concentrate with a grade of 43% combined with the concentrate of the second-stage strong magnetic machine is fed into the reverse flotation operation as the reverse flotation feed ore.
与现有技术相比，本发明的有益效果是： Compared with prior art, the beneficial effect of the present invention is:
1、有效处理了磁铁矿与赤褐铁矿嵌布粒度相差较大的磁、赤混合矿石获得了合格精矿产品； 1. Effectively processed magnetic and red mixed ore with large difference in particle size between magnetite and red limonite, and obtained qualified concentrate products;
2、将处理磁铁矿与处理赤褐铁矿的两种先进工艺有机结合，既有效应用了经济环保节能的处理磁铁矿工艺的单一磁选、细筛提质流程，又实现了处理赤褐铁矿的细粒强磁抛尾，混磁精反浮选获得合格精矿产品的弱磁-强磁-反浮选工艺流程的优势； 2. Combining the two advanced processes of processing magnetite and red limonite, it not only effectively applies the single magnetic separation and fine sieving process of processing magnetite which is economical, environmentally friendly and energy-saving, but also realizes the process of processing red limonite Fine-grained strong magnetic tailing of limonite, mixed magnetic fine reverse flotation to obtain the advantages of weak magnetic-strong magnetic-reverse flotation process for qualified concentrate products;
3、首先在较粗磨矿粒度条件下采用磁选-细筛获得一部分合格磁性精矿，减少了再磨磨矿矿量，节约了磨矿能耗，同时这部分矿石避免了采用反浮选方法选别，既节约了浮选药剂用量，而且降低了浮选药剂的污染问题，降低了选矿成本； 3. First, under the condition of relatively coarse grinding particle size, magnetic separation-fine sieve is used to obtain a part of qualified magnetic concentrate, which reduces the amount of re-grinding ore and saves energy consumption for grinding. At the same time, this part of ore avoids the use of reverse flotation Method selection not only saves the amount of flotation reagents, but also reduces the pollution of flotation reagents and reduces the cost of beneficiation;
4、细筛筛上产品与二段弱磁尾矿和一段强磁精矿合并作为中矿给入再磨机再磨后，经弱磁-强磁选别后给入反浮选选别，不仅解决了筛上产品需再磨再选的关键问题，而且这部分高品位矿量提高了反浮选给矿品位，优化了反浮选给矿条件。 4. The product on the fine screen is combined with the second-stage weak magnetic tailings and the first-stage strong magnetic concentrate as middle ore and sent to the re-grinder for re-grinding, and then sent to reverse flotation separation after weak-strong magnetic separation. It not only solves the key problem that the products on the sieve need to be regrinded and re-selected, but also improves the reverse flotation feeding grade and optimizes the reverse flotation feeding conditions for this part of high-grade ore.
附图说明 Description of drawings
图1为处理磁、赤混合矿石的选矿工艺流程图。 Figure 1 is a flow chart of the beneficiation process for processing magnetic and red mixed ores.
具体实施方式 Detailed ways
下面结合附图对本发明作进一步说明。 The present invention will be further described below in conjunction with accompanying drawing.
如图1所示，按照本发明的一种处理磁、赤混合矿石的选矿工艺，其特征在于包括下列步骤： As shown in Figure 1, according to a kind of mineral processing technology of processing magnetic, red mixed ore of the present invention, it is characterized in that comprising the following steps:
a) 将含磁铁矿与赤褐铁矿的混合矿石破碎后的原矿，给入一段球磨机和一次分级旋流器组组成的一次闭路磨矿， 一次分级旋流器组分级溢流的粒度-200目60%的溢流给入二次分级旋流器组，分级成溢流和沉砂粗细两种物料，将二次分级旋流器组分级的沉砂给入二段球磨机磨矿，二段球磨返回二次分级旋流器组，二次旋流器组分级的溢流粒度达到-200目85%给入两段弱磁机和一段强磁机选别； a) The raw ore after crushing the mixed ore containing magnetite and red limonite is fed into a closed-circuit grinding composed of a ball mill and a classifying cyclone group, and the granularity of the graded overflow of the primary classifying cyclone group is - 60% of the 200-mesh overflow is sent to the secondary classifying cyclone group, which is classified into two kinds of materials: overflow and grit, and the grit classified by the secondary classifying cyclone group is fed to the second-stage ball mill for grinding. The first ball mill returns to the secondary classification cyclone group, and the overflow particle size of the secondary cyclone group classification reaches -200 mesh 85%, which is sent to two-stage weak magnetic machine and one-stage strong magnetic machine for separation;
b) 原矿通过两段连续磨矿后，将二次旋流器组分级的溢流通过两段弱磁机选别使得二段弱磁机精矿达到该矿入筛品位62%以上的要求， b) After the raw ore passes through the two-stage continuous grinding, the overflow of the secondary cyclone group classification is passed through the two-stage magnetic field weakening machine to make the concentrate of the second stage magnetic field weakening machine meet the requirement of 62% or more of the ore's sieve grade,
一段弱磁机精矿给入二段弱磁机选别，二段弱磁精矿达到62%以上；一段弱磁机尾矿给入一段强磁机，抛出产率23%，品位7.5%的强磁尾矿； The concentrate of the first stage of weak magnetic machine is fed into the second stage of weak magnetic machine for separation, and the concentration of the second stage of weak magnetic concentrate reaches more than 62%; the tailings of the first stage of weak magnetic machine are fed into the first stage of strong magnetic machine, with a throwing yield of 23% and a grade of 7.5% strong magnetic tailings;
c) 采用细筛提质，经二段弱磁机选别后的品位达到62%以上的二段弱磁机精矿给入筛孔尺寸为0.10mm电磁高频振动细筛，电磁高频振动细筛的品位为65.5%以上、产率11%筛下产品为最终精矿。 c) The fine sieve is used to improve the quality, and the concentrate of the second-stage magnetic field weakening machine with a grade of more than 62% after being sorted by the second-stage magnetic field weakening machine is fed into the sieve hole size of 0.10mm electromagnetic high-frequency vibration fine screen, and the electromagnetic high-frequency vibration The grade of the fine sieve is above 65.5%, and the yield is 11%. The product under the sieve is the final concentrate.
采用电磁高频振动细筛首先获得一部分合格磁性精矿，使得这部分矿石避免了采用反浮选方法选别，节约了浮选药剂用量，不仅降低了选别成本，而且降低了浮选药剂的污染问题。 Using electromagnetic high-frequency vibrating fine screen to obtain a part of qualified magnetic concentrate first, so that this part of ore avoids the reverse flotation method of sorting, saves the amount of flotation reagents, not only reduces the cost of sorting, but also reduces the cost of flotation reagents pollution problem.
d) 中矿合并再磨再选， d) The middle ore is merged, regrinded and re-selected,
电磁高频振动细筛折筛上产品粒度较粗-200目72%，品位较低为57%，必须经过再磨再选才可获得合格最终精矿；一段强磁精矿品位较低为26%，产率48%，该部分强磁精矿中所含赤褐铁矿嵌布粒度较细，需再磨再选才可获得合格精矿产品；另外二段弱磁机尾矿产率将近5%左右，且品位较高在30%以上，不易作为尾矿直接抛出，也有必要再磨再选。 The particle size of the product on the electromagnetic high-frequency vibrating fine sieve is 72% coarser-200 mesh, and the lower grade is 57%. Only after regrinding and re-election can the qualified final concentrate be obtained; the grade of the first-stage strong magnetic concentrate is lower than 26% %, the yield is 48%. The red limonite embedded in this part of the strong magnetic concentrate has a finer particle size, and it needs to be regrinded and re-selected to obtain qualified concentrate products; in addition, the tailings yield of the second-stage weak magnetic machine is nearly 5 %, and the grade is higher than 30%, it is not easy to be directly thrown out as tailings, and it is also necessary to grind and re-election.
因此，本发明将一段强磁机的精矿、二段弱磁机尾矿以及电磁高频振动细筛筛上产品这三部分中矿合并一起给入三段球磨机再磨，三段球磨排矿给入三次分级旋流器组，三次分级旋流器组的沉砂返回三段球磨机，三次分级旋流器组的粒度为-200目95%的溢流给入三段弱磁机再选，其三段弱磁机尾矿给入二段强磁机抛尾，进一步抛出产率20.5%、品位11%的细粒合格尾矿，而三段弱磁机精矿和二段强磁机精矿合并品位为43%的混磁精作为反浮选给矿给入返浮选作业。 Therefore, in the present invention, the concentrate of the first-stage strong magnetic machine, the tailings of the second-stage weak magnetic machine and the product on the electromagnetic high-frequency vibrating fine screen are combined and fed into the three-stage ball mill for regrinding, and the three-stage ball mill discharges ore Feed into the three-stage classifying cyclone group, the sand settling of the three-stage classifying cyclone group returns to the three-stage ball mill, and the overflow of the particle size of the three-stage classifying cyclone group is -200 mesh 95% is fed into the three-stage magnetic field weakening machine for re-selection, The tailings of the three-stage weak magnetic machine are fed into the second-stage strong magnetic machine to throw tails, and the fine-grained qualified tailings with a yield of 20.5% and a grade of 11% are further thrown out, while the three-stage weak magnetic machine concentrate and the second-stage strong magnetic machine The mixed magnetic concentrate with a combined grade of 43% is used as reverse flotation feed ore to enter the return flotation operation.
本发明将中矿再磨后，再一次通过强磁选抛出大量达到单体解离合格细粒尾矿，为后续反浮选提供了合格的浮给产品； After the medium ore is reground in the present invention, a large amount of fine-grained tailings qualified for monomer dissociation are thrown out again through strong magnetic separation, providing qualified flotation products for subsequent reverse flotation;
三段弱磁机精矿和二段强磁机精矿合并品位为43%的混磁精作为反浮选给矿给入返浮选作业，经一粗、一精、三扫的反浮选选别，最终获得合格品位达到65%以上，产率23.5%的反浮选精矿，品位为19%以下、产率22%的反浮选尾矿作为最终尾矿抛弃。 The mixed magnetic concentrate with a combined grade of 43% of the three-stage weak magnetic machine concentrate and the second-stage strong magnetic machine concentrate is used as the reverse flotation feed ore to enter the return flotation operation. Separation, the reverse flotation concentrate with a qualified grade of more than 65% and a yield of 23.5% is finally obtained, and the reverse flotation tailings with a grade of less than 19% and a yield of 22% are discarded as final tailings.
本发明有机结合处理磁铁矿的单一磁选、细筛再磨工艺流程处理该矿石，可以在较粗磨矿粒度条件下，首先获得一部分筛下合格磁铁精矿产品，另一部分筛上产品再与矿石中的弱磁性矿物合并给入再磨，细磨后的再磨产品再经一段弱磁和一段强磁选别，再一次抛出细粒尾矿，弱磁精矿和强磁精矿合并为混磁精给入反浮选工艺选别获得合格浮选精矿产品，反浮选尾矿作为最终尾矿抛弃。细筛筛下产品与反浮选精矿合并为最终合格精矿，两段强磁尾矿与浮选尾矿合并为综合尾矿。 The single magnetic separation and fine sieve regrinding process of the present invention can process the ore with organic combination, and under the condition of relatively coarse grinding ore particle size, firstly, a part of the qualified magnetite concentrate products under the sieve can be obtained, and the other part of the sieve products can be re-grinded. It is combined with the weak magnetic minerals in the ore and fed into the regrind, and the regrind products after fine grinding go through a period of weak magnetic and a period of strong magnetic separation, and then throw out fine tailings, weak magnetic concentrate and strong magnetic concentrate Combined into a mixed magnetic concentrate, it is fed into the reverse flotation process to obtain qualified flotation concentrate products, and the reverse flotation tailings are discarded as final tailings. The product under the fine screen is combined with the reverse flotation concentrate to form the final qualified concentrate, and the two-stage strong magnetic tailings and flotation tailings are combined into comprehensive tailings.
采用本发明的两段连续磨矿，弱磁-细筛，中矿再磨，弱磁-强磁-反浮选工艺流程处理磁、赤混合矿石，最终获得原矿品位30.5%，精矿产率34.12%，精矿品位65.25，金属回收率72.99%，综合尾矿品位12.50%的较好的选矿指标。 Adopt the two-stage continuous grinding of the present invention, weak magnetic field-fine screen, medium ore regrinding, weak magnetic field-strong magnetic field-reverse flotation process to process magnetic and red mixed ore, and finally obtain the raw ore grade of 30.5%, and the concentrate yield of 34.12% %, the concentrate grade is 65.25, the metal recovery rate is 72.99%, and the comprehensive tailings grade is 12.50%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569249.XA CN103586146B (en) | 2013-11-13 | 2013-11-13 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569249.XA CN103586146B (en) | 2013-11-13 | 2013-11-13 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103586146A CN103586146A (en) | 2014-02-19 |
| CN103586146B true CN103586146B (en) | 2015-05-13 |
Family
ID=50076582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310569249.XA Active CN103586146B (en) | 2013-11-13 | 2013-11-13 | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103586146B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821653A (en) * | 2019-03-27 | 2019-05-31 | 辽宁科技大学 | A combined technology of magnetic separation column and centrifuge to separate lean magnetite |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785367B (en) * | 2015-04-03 | 2017-04-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Mineral separation method for pre-extracted concentrate by roasting iron ore |
| CN104888947B (en) * | 2015-06-12 | 2016-11-23 | 鞍钢集团矿业公司 | The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process |
| CN104874462B (en) * | 2015-06-12 | 2017-11-03 | 鞍钢集团矿业有限公司 | The pre-selection of fine grain teeth cloth composite ore coarse grain, magnetic-floating sorting process |
| CN105855019B (en) * | 2016-05-24 | 2018-09-21 | 中国地质科学院郑州矿产综合利用研究所 | Ultrafine crushing-grading magnetic separation method for magnetite |
| CN106076606B (en) * | 2016-08-10 | 2018-06-01 | 中钢集团马鞍山矿山研究院有限公司 | A kind of beneficiation method of magnetic-red Complex iron ore |
| CN106423533A (en) * | 2016-10-14 | 2017-02-22 | 鞍钢集团矿业有限公司 | Poor hematite high-pressure roller grinding, roughness and fineness classification and reselection-magnetic separation-reverse flotation technology |
| CN106513163A (en) * | 2016-10-14 | 2017-03-22 | 鞍钢集团矿业有限公司 | High-pressure rolling and magnetic-gravity separation process for lean hematite |
| CN106492977A (en) * | 2016-10-14 | 2017-03-15 | 鞍钢集团矿业有限公司 | The strong magnetic reverse floatation process of lean hematite high pressure roller mill, weak magnetic |
| CN107159445A (en) * | 2017-06-16 | 2017-09-15 | 鞍钢集团矿业有限公司 | A kind of iron ore composite ore point mill, sorting, magnetic-ore flotation technique |
| CN107088470B (en) * | 2017-06-16 | 2019-05-28 | 鞍钢集团矿业有限公司 | A kind of composite ore point mill, sorting, strong magnetic-suspension roasting-weak magnetic separation process |
| CN109201321B (en) * | 2018-09-20 | 2020-07-28 | 鞍钢集团矿业有限公司 | A kind of separation process of magnetic-hematite mixed iron ore |
| CN109351467B (en) * | 2018-09-20 | 2020-07-28 | 鞍钢集团矿业有限公司 | A sorting process for treating maghemite mixed ore based on iron mineral embedded particle size |
| CN109675712B (en) * | 2019-01-08 | 2020-07-14 | 中冶北方（大连）工程技术有限公司 | Mineral processing technology for treating high-sulfur hematite-magnetic mixed iron ore |
| CN109894267B (en) * | 2019-03-20 | 2020-05-19 | 中钢集团马鞍山矿山研究院有限公司 | Magnetic-gravity separation method for magnetic-hematite mixed iron ore |
| CN111013809B (en) * | 2019-12-10 | 2021-09-03 | 玉溪大红山矿业有限公司 | Mineral processing technology for separating, grinding, sorting, upgrading and tailing reducing of lava ore |
| CN111167595A (en) * | 2019-12-30 | 2020-05-19 | 东营方圆有色金属有限公司 | Process method for improving qualified material granularity ratio by secondary classification of cyclone of concentrating mill |
| CN114308370B (en) * | 2020-09-27 | 2023-07-14 | 南京宝地梅山产城发展有限公司 | Process for grinding, magnetically separating, upgrading and sand making mixed iron ore |
| CN112337621B (en) * | 2020-10-13 | 2023-02-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Production process and equipment of high-grade vanadium-titanium magnetite concentrate |
| CN114405675B (en) * | 2021-12-31 | 2023-05-16 | 玉溪大红山矿业有限公司 | Mineral separation process for iron ore mixed ore |
| CN115254400A (en) * | 2022-06-01 | 2022-11-01 | 浙江艾领创矿业科技有限公司 | Mineral separation process for iron ore by large horizontal sand mill |
| CN115364984B (en) * | 2022-08-31 | 2023-08-08 | 中冶北方（大连）工程技术有限公司 | New process for grinding and preselecting hematite |
| CN115709127A (en) * | 2022-11-16 | 2023-02-24 | 鞍钢集团北京研究院有限公司 | Mixed iron ore continuous grinding and magnetic-floating short-flow classification and sorting process |
| CN117046611A (en) * | 2023-04-21 | 2023-11-14 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Efficient low-energy-consumption beneficiation method for embedded magnetite with uneven thickness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3502271A (en) * | 1967-05-29 | 1970-03-24 | Univ Minnesota | Iron ore treating process |
| CN102430468A (en) * | 2011-09-19 | 2012-05-02 | 鞍钢集团矿业公司 | Magnetic-gravity combined separation process for magnetic and hematite mixed type rough concentrate |
| CN102441481A (en) * | 2011-09-19 | 2012-05-09 | 鞍钢集团矿业公司 | Magnetic-red mixed type rough concentrate mineral separation process |
| CN103272684A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Hematite stage grinding and magnetic-separation-flotation process |
-
2013
- 2013-11-13 CN CN201310569249.XA patent/CN103586146B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3502271A (en) * | 1967-05-29 | 1970-03-24 | Univ Minnesota | Iron ore treating process |
| CN102430468A (en) * | 2011-09-19 | 2012-05-02 | 鞍钢集团矿业公司 | Magnetic-gravity combined separation process for magnetic and hematite mixed type rough concentrate |
| CN102441481A (en) * | 2011-09-19 | 2012-05-09 | 鞍钢集团矿业公司 | Magnetic-red mixed type rough concentrate mineral separation process |
| CN103272684A (en) * | 2013-06-13 | 2013-09-04 | 鞍钢集团矿业公司 | Hematite stage grinding and magnetic-separation-flotation process |
Non-Patent Citations (1)
| Title |
|---|
| 某细粒嵌布赤铁矿选矿试验;吴文红;《现代矿业》;20130331(第3期);98-100页 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821653A (en) * | 2019-03-27 | 2019-05-31 | 辽宁科技大学 | A combined technology of magnetic separation column and centrifuge to separate lean magnetite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103586146A (en) | 2014-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103586146B (en) | Mineral processing process for processing mixed ore of magnetic iron ore and hematite-limonite ore | |
| CN104874462B (en) | The pre-selection of fine grain teeth cloth composite ore coarse grain, magnetic-floating sorting process | |
| CN104923386B (en) | The pre-selection of fine grain teeth cloth composite ore coarse grain, magnetic-weight sorting process | |
| CN102698871B (en) | Ore dressing technology for treating vanadium titano-magnetite | |
| CN103041912B (en) | Beneficiation method of low-grade ilmenite | |
| CN104394993B (en) | A kind of pretreatment method of ilmenite iron beneficiation tailings | |
| CN104888960B (en) | The magnetic of the red composite ore of fine grain teeth cloth magnetic floats sorting process | |
| CN102527504B (en) | Magnetic ore dressing method | |
| CN109351467B (en) | A sorting process for treating maghemite mixed ore based on iron mineral embedded particle size | |
| CN103706463B (en) | A kind of titanium separation method | |
| CN102441481B (en) | Mineral separation process for magnetic hematite rough concentrates | |
| CN103567051B (en) | Small-scale lean hematite separation technology | |
| CN104888947B (en) | The magnetic separation of fine grain teeth cloth magnetic-red composite ore-centrifuge sorting process | |
| CN108970802B (en) | A stage grinding-magnetic-gravity-flotation combined beneficiation process for separating hematite ore | |
| CN102553707A (en) | Process for separating lean-magnetite fine ore | |
| CN101468330A (en) | Technique for processing mixed type iron ore | |
| CN104174482A (en) | Mineral processing technology for low grade hematite ore | |
| CN102228863B (en) | Novel separation process of multi-metal lean hematite | |
| CN101612618B (en) | Process for discarding coarse tailings with primary sand return for ultralean magnetite ores | |
| CN106269204A (en) | A kind of energy saving technique processing extreme poverty bloodstone wet type pre-selecting rough concentrate | |
| CN111013811A (en) | A coarse and fine separation-gravity-magnetic combined beneficiation process for processing Anshan-type iron ore | |
| CN107096638A (en) | A kind of iron ore composite ore point mill, sorting, magnetic-gravity separation technique | |
| CN107159445A (en) | A kind of iron ore composite ore point mill, sorting, magnetic-ore flotation technique | |
| CN104014415A (en) | Technology for treating fine particle dissemination carbonate-containing hematite ore | |
| CN107029868A (en) | A kind of composite ore high pressure roller mill, double media, the red ore deposit sorting process of magnetic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |