CN105689126A - A kind of beneficiation process of oolitic hematite - Google Patents
A kind of beneficiation process of oolitic hematite Download PDFInfo
- Publication number
- CN105689126A CN105689126A CN201610138658.8A CN201610138658A CN105689126A CN 105689126 A CN105689126 A CN 105689126A CN 201610138658 A CN201610138658 A CN 201610138658A CN 105689126 A CN105689126 A CN 105689126A
- Authority
- CN
- China
- Prior art keywords
- ore
- concentrate
- magnetic separation
- iron concentrate
- magnetic separator
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052595 hematite Inorganic materials 0.000 title claims abstract description 14
- 239000011019 hematite Substances 0.000 title claims abstract description 14
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 230000008569 process Effects 0.000 title abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000012141 concentrate Substances 0.000 claims abstract description 60
- 238000007885 magnetic separation Methods 0.000 claims abstract description 56
- 229910052742 iron Inorganic materials 0.000 claims abstract description 52
- 239000006148 magnetic separator Substances 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims description 8
- 239000000047 product Substances 0.000 claims description 4
- 239000013067 intermediate product Substances 0.000 claims description 3
- 239000000567 combustion gas Substances 0.000 claims 2
- 238000010079 rubber tapping Methods 0.000 claims 2
- 238000005245 sintering Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000012216 screening Methods 0.000 abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 19
- 238000005188 flotation Methods 0.000 description 9
- 238000005054 agglomeration Methods 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明公开了一种鲕状赤铁矿选矿工艺，其包括以下步骤：将原矿在破碎机内破碎成5mm以下粒度，然后在500～550℃燃气回转窑内焙烧至少1小时；再进行磨矿至粒度0.074mm以下含量占34%，然后使用湿式磁选机进行弱磁选，磁选出铁粗精矿1和尾矿1；将铁粗精矿1进入振动筛进行筛分，在振动筛上面的为合格铁精矿1，在振动筛下面的进入首次磁选柱精选；精选出铁粗精矿2和尾矿2；将铁粗精矿2再磨至粒度0.074mm以下含量占75%，进行第二次磁选柱精选，精选出铁粗精矿3和中矿1；将铁粗精矿3进行第三次磁选柱精选，精选出铁精矿2和中矿2。本发明工艺简单、成本低，因不需要添加任何药剂，所以环保、回水利用率高。
The invention discloses an oolitic hematite beneficiation process, which comprises the following steps: crushing the raw ore into a particle size of less than 5 mm in a crusher, and then roasting in a gas rotary kiln at 500-550°C for at least 1 hour; grinding the ore to a particle size of less than 0.074 mm and a content of 34%, and then using a wet magnetic separator for weak magnetic separation to magnetically select a rough iron concentrate 1 and a tailing 1; the rough iron concentrate 1 enters a vibrating screen for screening, and the qualified iron concentrate 1 is above the vibrating screen, and the iron concentrate below the vibrating screen enters a first magnetic separation column for selection; the rough iron concentrate 2 and the tailing 2 are selected; the rough iron concentrate 2 is ground again to a particle size of less than 0.074 mm and a content of 75%, and the second magnetic separation column is selected to select the rough iron concentrate 3 and the middling 1; the rough iron concentrate 3 is selected by the third magnetic separation column to select the iron concentrate 2 and the middling 2. The invention has simple process and low cost, and is environmentally friendly and has high water return utilization rate because no reagent is added.
Description
技术领域 technical field
本发明属于选矿技术领域，涉及一种鲕状赤铁矿选矿工艺。 The invention belongs to the technical field of beneficiation, and relates to a beneficiation process of oolitic hematite.
背景技术 Background technique
现有的赤铁矿选矿工艺如镜铁山铁矿石采用块矿焙烧磁选（150～15mm粒级）、粉矿强磁选（15～0mm粒级）的工艺进行处理。块矿焙烧设备为100m3鞍山式还原磁化焙烧竖炉，焙烧温度650℃-700℃，焙烧流程为闭路磁化焙烧；磨矿工艺为三段阶段磨矿，磨矿细度为粒度在0.045mm以下的占93.81%；选别工艺为四次磁选后的粗精矿到阳离子反浮选流程，即将第四次磁选的精矿引入再磨反浮选系统。再磨作业由球磨机与水力旋流器组成磨矿分级回路，浮选流程为一次粗选、一次精选、四次扫选反浮选流程。在浮选给矿品位55.76%的条件下，精矿品位60.61%，SiO2含量5.76%，尾矿品位24.16%，浮选作业铁回收率94.23%。该磨选工艺磨矿细度细造成磨矿成本高、选别流程长造成选矿成本高。反浮选作业需要添加浮选药剂,产生的废水不能被回收利用，废水回收利用率低。 The existing hematite beneficiation process, such as Jingtieshan iron ore, is processed by lump ore roasting magnetic separation (150-15mm particle size) and fine ore strong magnetic separation (15-0mm particle size). The lump ore roasting equipment is a 100m 3 Anshan type reduction magnetization roasting shaft furnace, the roasting temperature is 650°C-700°C, the roasting process is closed-circuit magnetization roasting; the grinding process is three-stage grinding, and the grinding fineness is below 0.045mm accounted for 93.81%; the sorting process is the rough concentrate after the fourth magnetic separation to the cationic reverse flotation process, that is, the concentrate from the fourth magnetic separation is introduced into the regrind reverse flotation system. The regrinding operation consists of a ball mill and a hydrocyclone to form a grinding and classification circuit. The flotation process is a roughing, a beneficiating, and four sweeping and reverse flotation processes. Under the condition of 55.76% ore grade for flotation, the concentrate grade is 60.61%, the SiO 2 content is 5.76%, the tailings grade is 24.16%, and the iron recovery rate of flotation operation is 94.23%. The fineness of the grinding and separation process results in high grinding costs, and the long separation process results in high separation costs. The reverse flotation operation needs to add flotation reagents, the waste water generated cannot be recycled, and the waste water recycling rate is low.
发明内容 Contents of the invention
本发明的目的就是解决现有技术中存在的上述问题，提供一种工艺简单、成本低、不需要添加任何药剂，环保，回水利用率高的鲕状赤铁矿选矿工艺。 The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide an oolitic hematite beneficiation process with simple process, low cost, no need to add any chemicals, environmental protection, and high return water utilization rate.
为实现上述目的，本发明的技术解决方案是：一种鲕状赤铁矿选矿工艺，其包括以下步骤：(1)将原矿在破碎机内破碎成5mm以下的粒度，将破碎后的矿石在燃气回转窑内焙烧至少1小时，焙烧温度为500～550℃；(2)将焙烧后的矿石进行磨矿至粒度0.074mm以下含量占34%，然后使用湿式磁选机进行弱磁选，磁选出铁粗精矿1和尾矿1；(3)磁选出的铁粗精矿1进入振动筛进行筛分，振动筛筛网孔径在0.7mm～1mm；在振动筛上面的产品为合格铁精矿1，在振动筛下面的中间产品进入首次磁选柱精选；(4)磁选柱精选出铁粗精矿2和尾矿2；将磁选柱精选出的铁粗精矿2再磨至粒度0.074mm以下含量占75%，进行第二次磁选柱精选，精选出铁粗精矿3和中矿1；(5)第二次磁选柱精选出的铁粗精矿3进行第三次磁选柱精选，精选出合格铁精矿2和中矿2。 To achieve the above object, the technical solution of the present invention is: a kind of oolitic hematite beneficiation process, it comprises the following steps: (1) raw ore is broken into the particle size below 5mm in crusher, ore after crushing is in Roast in a gas-fired rotary kiln for at least 1 hour at a temperature of 500-550°C; (2) Grind the roasted ore until the particle size is less than 0.074mm and the content accounts for 34%, and then use a wet magnetic separator for weak magnetic separation. Select iron coarse concentrate 1 and tailings 1; (3) The iron coarse concentrate 1 that is magnetically separated enters the vibrating screen for screening, and the aperture of the vibrating screen is 0.7mm ~ 1mm; Iron concentrate 1, the intermediate product below the vibrating screen enters the first magnetic separation column for selection; (4) the magnetic separation column selects iron coarse concentrate 2 and tailings 2; the iron coarse concentrate 2 and tailings 2 selected by the magnetic separation column The ore 2 is ground again until the particle size is less than 0.074mm and the content accounts for 75%, and the second magnetic separation column is selected to select the iron coarse concentrate 3 and the middle ore 1; (5) the second magnetic separation column selects The coarse iron concentrate 3 is subjected to the third magnetic separation column selection, and the qualified iron concentrate 2 and middle ore 2 are selected.
将上述所述的中矿1和中矿2合并后返回到湿式磁选机继续进行弱磁选。 After the above-mentioned medium mine 1 and medium mine 2 are combined, return to the wet magnetic separator to continue weak magnetic separation.
上述所述的湿式磁选机弱磁选磁场强度为120kA/m。 The wet magnetic separator described above has a weak magnetic separation magnetic field strength of 120kA/m.
(1)本发明采用燃气回转窑，在低温（500℃-550℃）条件下对鲕状赤铁矿进行磁化焙烧。焙烧后铁矿磁化效果良好，且焙烧条件较宽，操作简单，现场适应性强，适合大规模工业生产。(2)本发明采用振动筛和磁选柱设备，用于对赤铁矿焙烧矿磁选精选流程，试验效果优异。利用焙烧矿矫顽力强、易磁团聚的特点，在粗磨（粒度在0.074mm以下的含量占34%）条件下，采用湿式磁选机粗选（磁场强度为120kA/m），磁铁矿在选别过程中将形成“磁团聚”，这样可以捕捉微细粒单体磁铁矿颗粒，避免磁铁矿细泥损失，在粗选时确保回收率。对粗精矿采用振动筛精选，与传统的球磨机-振动筛分级闭路不同，在这里振动筛用于选别作业，振动筛采用大孔径（0.7mm～1mm）筛网，由细粒级磁铁矿形成的“磁团聚”被隔离在筛上，形成合格铁精矿1，磁性较弱的连生体和脉石矿物（小于0.7mm）成为筛下产品进入第二段磨矿作业，可提前获得产率32～42%左右的合格铁精矿，仅有产率11～14%的中间产品进入下一段再磨精选作业，大幅度降低了磨选成本；再磨精选作业采用磁选柱精选，磁选柱能充分分散剩余的“磁团聚”以淘汰夹杂于磁团聚中的单体脉石以及磁铁矿与脉石的贫连生体，克服由于磁团聚所造成的磁选过程选择性降低的现象，起到精选的作用。 (1) The present invention uses a gas-fired rotary kiln to magnetize and roast the oolitic hematite at a low temperature (500°C-550°C). After roasting, the magnetization effect of iron ore is good, and the roasting conditions are wide, the operation is simple, the field adaptability is strong, and it is suitable for large-scale industrial production. (2) The present invention adopts a vibrating screen and a magnetic separation column equipment for the magnetic separation and concentration process of hematite roasted ore, and the test effect is excellent. Taking advantage of the characteristics of strong coercive force and easy magnetic agglomeration of roasted ore, under the condition of coarse grinding (the content of particle size below 0.074mm accounts for 34%), wet magnetic separator is used for rough separation (magnetic field strength is 120kA/m), and the magnet The ore will form "magnetic agglomeration" during the sorting process, which can capture fine single magnetite particles, avoid the loss of magnetite fine mud, and ensure the recovery rate during rough separation. The vibrating screen is used to select the coarse concentrate, which is different from the traditional ball mill-vibrating screen classification closed circuit. Here the vibrating screen is used for sorting operations. The "magnetic agglomeration" formed by iron ore is isolated on the sieve to form qualified iron concentrate 1, and the weaker magnetic joints and gangue minerals (less than 0.7mm) become the products under the sieve and enter the second stage of grinding operation, which can be advanced Qualified iron ore concentrate with a yield of about 32-42% is obtained, and only intermediate products with a yield of 11-14% enter the next stage of regrinding and selection operation, which greatly reduces the cost of grinding and selection; the regrinding and selection operation adopts magnetic separation Column selection, the magnetic separation column can fully disperse the remaining "magnetic agglomeration" to eliminate the single gangue mixed in the magnetic agglomeration and the poor joints of magnetite and gangue, and overcome the magnetic separation process caused by magnetic agglomeration The phenomenon of reduced selectivity plays a selective role.
总之，本发明工艺简单、成本低；第二段磨矿精选作业的给矿量少，大幅度降低磨矿、选矿成本，第二段磨矿精选作业成本可降低50%左右；筛分磁选工艺与磁选-反浮选工艺相比，不需要添加任何药剂，属清洁生产工艺；因不需要添加任何药剂，所以回水利用率高。 In a word, the present invention has simple process and low cost; the ore feeding amount of the second stage grinding and beneficiation operation is small, the cost of ore grinding and beneficiation is greatly reduced, and the cost of the second stage grinding and beneficiation operation can be reduced by about 50%; Compared with the magnetic separation-reverse flotation process, the magnetic separation process does not need to add any chemicals, which is a clean production process; because it does not need to add any chemicals, the return water utilization rate is high.
附图说明 Description of drawings
图1为本发明的生产工艺图。 Fig. 1 is a production process diagram of the present invention.
具体实施方式 detailed description
下面结合附图和具体实施例对本发明做进一步的描述。 The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
实施例1，如图1所示，本实施例包括以下步骤：(1)将原矿在破碎机内破碎成5mm以下的粒度，将破碎后的矿石在燃气回转窑内焙烧1小时，焙烧温度为500℃。(2)将焙烧后的矿石进行磨矿至粒度0.074mm以下含量占34%，然后使用湿式磁选机进行弱磁选，磁选出铁粗精矿1和尾矿1。进一步优选地，所述的湿式磁选机弱磁选磁场强度为120kA/m。(3)磁选出的铁粗精矿1进入振动筛进行筛分分选，振动筛筛网孔径在0.7mm；在振动筛上面的产品为合格铁精矿1，在振动筛下面的中间产品进入首次磁选柱精选，磁选柱的冲洗水速度为80ml/s。(4)磁选柱精选出铁粗精矿2和尾矿2；将磁选柱精选出的铁粗精矿2再磨至粒度0.074mm以下含量占75%，进行第二次磁选柱精选，磁选柱的冲洗水速度为160ml/s，精选出铁粗精矿3和中矿1；(5)第二次磁选柱精选出的铁粗精矿3进行第三次磁选柱精选，精选出合格铁精矿2和中矿2。合格铁精矿1产率34.20%、TFe品位62.65%、回收率48.60%；合格铁精矿2产率24.93%、TFe品位61.33%、回收率34.68%；中矿1和中矿2合并后的中矿产率12.64%、TFe品位34.70%、回收率9.95%；尾矿1产率23.08%、TFe品位10.26%、回收率5.37%；尾矿2产率5.15%、TFe品位11.99%、回收率5.37%。对100吨赤铁矿石，成本降低51%。进一步优选地，将所述的中矿1和中矿2合并后返回到湿式磁选机继续进行弱磁选。 Embodiment 1, as shown in Figure 1, present embodiment comprises the following steps: (1) raw ore is broken into the particle size below 5mm in crusher, the ore after the crushing is roasted 1 hour in gas-fired rotary kiln, and roasting temperature is 500°C. (2) Grind the roasted ore until the particle size is less than 0.074mm and the content accounts for 34%, and then use a wet magnetic separator for weak magnetic separation to magnetically separate the iron coarse concentrate 1 and tailings 1. Further preferably, the weak magnetic separation field strength of the wet magnetic separator is 120kA/m. (3) The iron coarse concentrate 1 that is magnetically separated enters the vibrating screen for screening and sorting. Entering the first magnetic separation column selection, the washing water speed of the magnetic separation column is 80ml/s. (4) The iron coarse concentrate 2 and tailings 2 are selected by the magnetic separation column; the iron coarse concentrate 2 selected by the magnetic separation column is ground to a particle size below 0.074mm and the content accounts for 75%, and the second magnetic separation is carried out Column selection, the washing water speed of the magnetic separation column is 160ml/s, and the iron coarse concentrate 3 and the middle ore 1 are selected; (5) the iron coarse concentrate 3 selected by the second magnetic separation column is subjected to the third The secondary magnetic separation column is selected to select qualified iron concentrate 2 and middle ore 2. The yield of qualified iron concentrate 1 is 34.20%, the grade of TFe is 62.65%, and the recovery rate is 48.60%; the yield of qualified iron concentrate 2 is 24.93%, the grade of TFe is 61.33%, and the recovery rate is 34.68%; Medium ore yield 12.64%, TFe grade 34.70%, recovery rate 9.95%; tailings 1 yield 23.08%, TFe grade 10.26%, recovery rate 5.37%; tailings 2 yield 5.15%, TFe grade 11.99%, recovery rate 5.37% %. For 100 tons of hematite ore, the cost is reduced by 51%. Further preferably, the middle ore 1 and the middle ore 2 are combined and returned to the wet magnetic separator to continue weak magnetic separation.
实施例2，如图1所示，本实施例包括以下步骤：(1)将原矿在破碎机内破碎成5mm以下的粒度，将破碎后的矿石在燃气回转窑内焙烧至少1小时，焙烧温度为530℃。(2)将焙烧后的矿石进行磨矿至粒度0.074mm以下含量占34%，然后使用湿式磁选机进行弱磁选，磁选出铁粗精矿1和尾矿1。进一步优选地，所述的湿式磁选机弱磁选磁场强度为120kA/m。(3)磁选出的铁粗精矿1进入振动筛进行筛分分选，振动筛筛网孔径在0.8mm；在振动筛上面的产品为合格铁精矿1，在振动筛下面的中间产品进入首次磁选柱精选，磁选柱的冲洗水速度为80ml/s。(4)磁选柱精选出铁粗精矿2和尾矿2；将磁选柱精选出的粗精矿2再磨至粒度0.074mm以下含量占75%，进行第二次磁选柱精选，磁选柱的冲洗水速度为160ml/s，精选出铁粗精矿3和中矿1。(5)第二次磁选柱精选出的铁粗精矿3进行第三次磁选柱精选，精选出合格铁精矿2和中矿2。铁精矿1产率42.39%、TFe品位62.59%、回收率59.36%；铁精矿2产率15.87%、TFe品位61.16%、回收率21.71%；中矿1和中矿2合并后的中矿产率10.89%、TFe品位37.94%、回收率9.24%；尾矿1产率25.35%、TFe品位13.37%、回收率7.58%；尾矿2产率5.49%、TFe品位17.17%、回收率2.11%；焙烧产品产率100%、TFe品位44.71%、回收率100%。对100吨赤铁矿石，成本降低64%。进一步优选地，将所述的中矿1和中矿2合并后返回到湿式磁选机继续进行弱磁选。 Embodiment 2, as shown in Figure 1, present embodiment comprises the following steps: (1) raw ore is broken into the granularity below 5mm in crusher, the ore after the crushing is roasted at least 1 hour in gas-fired rotary kiln, roasting temperature It is 530°C. (2) Grind the roasted ore until the particle size is less than 0.074mm and the content accounts for 34%, and then use a wet magnetic separator for weak magnetic separation to magnetically separate the iron coarse concentrate 1 and tailings 1. Further preferably, the weak magnetic separation field strength of the wet magnetic separator is 120kA/m. (3) The iron coarse concentrate 1 that is magnetically separated enters the vibrating screen for screening and sorting. Entering the first magnetic separation column selection, the washing water speed of the magnetic separation column is 80ml/s. (4) Iron coarse concentrate 2 and tailings 2 are selected by the magnetic separation column; the coarse concentrate 2 selected by the magnetic separation column is then ground to a particle size of 0.074mm or less and the content accounts for 75%, and the second magnetic separation column is carried out For selection, the washing water speed of the magnetic separation column is 160ml/s, and the coarse iron concentrate 3 and the middle ore 1 are selected. (5) The coarse iron concentrate 3 selected by the second magnetic separation column is subjected to the third magnetic separation column separation, and the qualified iron concentrate 2 and middle ore 2 are selected. The yield of iron concentrate 1 is 42.39%, the grade of TFe is 62.59%, and the recovery rate is 59.36%; the yield of iron concentrate 2 is 15.87%, the grade of TFe is 61.16%, and the recovery rate is 21.71%; Tailings 1 yield 10.89%, TFe grade 37.94%, recovery 9.24%; Tailings 1 yield 25.35%, TFe grade 13.37%, recovery 7.58%; Tailings 2 yield 5.49%, TFe grade 17.17%, recovery 2.11%; The yield of roasted products is 100%, the grade of TFe is 44.71%, and the recovery rate is 100%. For 100 tons of hematite ore, the cost is reduced by 64%. Further preferably, the middle ore 1 and the middle ore 2 are combined and returned to the wet magnetic separator to continue weak magnetic separation.
实施例3，如图1所示，本实施例包括以下步骤：(1)将原矿在破碎机内破碎成5mm以下的粒度，将破碎后的矿石在燃气回转窑内焙烧至少1小时，焙烧温度为550℃。(2)将焙烧后的矿石进行磨矿至粒度0.074mm以下含量占34%，然后使用湿式磁选机进行弱磁选，磁选出铁粗精矿1和尾矿1。所述的湿式磁选机弱磁选磁场强度为120kA/m。(3)磁选出的铁粗精矿1进入振动筛进行筛分，振动筛筛网孔径在1mm；在振动筛上面的产品为合格铁精矿1，在振动筛下面的中间产品进入首次磁选柱精选，磁选柱的冲洗水速度为80ml/s。(4)磁选柱精选出铁粗精矿2和尾矿2；将磁选柱精选出的铁粗精矿2再磨至粒度0.074mm以下含量占75%，进行第二次磁选柱精选，磁选柱的冲洗水速度为160ml/s，精选出铁粗精矿3和中矿1。(5)第二次磁选柱精选出的铁粗精矿3进行第三次磁选柱精选，精选出合格铁精矿2和中矿2。合格铁精矿1产率32.32%、TFe品位62.61%、回收率44.84%；合格铁精矿2产率26.64%、TFe品位61.32%、回收率36.19%；中矿产率14.04%、TFe品位34.49%、回收率10.73%；尾矿1产率24.14%、TFe品位14.03%、回收率7.50%；尾矿2产率2.86%、TFe品位11.65%、回收率0.74%；焙烧产品产率100%、TFe品位45.13%、回收率100%。对100吨赤铁矿石，成本降低46%。进一步优选地，将所述的中矿1和中矿2合并后返回到湿式磁选机继续进行弱磁选。 Embodiment 3, as shown in Figure 1, present embodiment comprises the following steps: (1) raw ore is broken into the particle size below 5mm in crusher, the ore after the crushing is roasted at least 1 hour in gas-fired rotary kiln, roasting temperature is 550°C. (2) Grind the roasted ore until the particle size is less than 0.074mm and the content accounts for 34%, and then use a wet magnetic separator for weak magnetic separation to magnetically separate the iron coarse concentrate 1 and tailings 1. The weak magnetic separation field strength of the wet magnetic separator is 120kA/m. (3) The coarse iron ore concentrate 1 that is magnetically separated enters the vibrating screen for screening. The column is selected carefully, and the washing water speed of the magnetic column is 80ml/s. (4) The iron coarse concentrate 2 and tailings 2 are selected by the magnetic separation column; the iron coarse concentrate 2 selected by the magnetic separation column is ground to a particle size below 0.074mm and the content accounts for 75%, and the second magnetic separation is carried out Column selection, the washing water speed of the magnetic separation column is 160ml/s, and the iron coarse concentrate 3 and medium ore 1 are selected. (5) The coarse iron concentrate 3 selected by the second magnetic separation column is subjected to the third magnetic separation column separation, and the qualified iron concentrate 2 and middle ore 2 are selected. Qualified iron concentrate 1 yield 32.32%, TFe grade 62.61%, recovery rate 44.84%; qualified iron concentrate 2 yield 26.64%, TFe grade 61.32%, recovery rate 36.19%; middle ore yield 14.04%, TFe grade 34.49% , recovery rate 10.73%; tailings 1 yield 24.14%, TFe grade 14.03%, recovery rate 7.50%; tailings 2 yield 2.86%, TFe grade 11.65%, recovery rate 0.74%; roasted product yield 100%, TFe The grade is 45.13%, and the recovery rate is 100%. For 100 tons of hematite ore, the cost is reduced by 46%. Further preferably, the middle ore 1 and the middle ore 2 are combined and returned to the wet magnetic separator to continue weak magnetic separation.
上述所述实施例仅是优选和示例形的，凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，其都在本专利的保护范围内。 The above-mentioned embodiments are only preferred and exemplary, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of this patent.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610138658.8A CN105689126B (en) | 2016-05-11 | 2016-05-11 | Oolitic hematite beneficiation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610138658.8A CN105689126B (en) | 2016-05-11 | 2016-05-11 | Oolitic hematite beneficiation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105689126A true CN105689126A (en) | 2016-06-22 |
| CN105689126B CN105689126B (en) | 2018-01-09 |
Family
ID=56221371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610138658.8A Expired - Fee Related CN105689126B (en) | 2016-05-11 | 2016-05-11 | Oolitic hematite beneficiation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105689126B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN107377205A (en) * | 2017-07-11 | 2017-11-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A circulating non-dumping utilization process of iron ore suspension roasting magnetic separation flotation tailings |
| CN109317289A (en) * | 2018-11-14 | 2019-02-12 | 王光领 | Dry sand medium preparation process is used on air dry sand Recognition Applied in Coal Preparation System |
| CN115055276A (en) * | 2022-06-09 | 2022-09-16 | 赣州金环磁选科技装备股份有限公司 | A kind of technological process of oolitic hematite physical beneficiation |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3829029A (en) * | 1971-01-21 | 1974-08-13 | Carborundum Co | Abrasive blast cleaning system |
| EP0237689A1 (en) * | 1986-02-28 | 1987-09-23 | MANNESMANN Aktiengesellschaft | Process for the production of finely divided fuel |
| CN101440416A (en) * | 2008-12-18 | 2009-05-27 | 周玉平 | Iron increase and phosphorous reduction method for oolitic high phosphorus hematite |
| CN101693222A (en) * | 2009-11-02 | 2010-04-14 | 贵州大学 | Method for separating oolitic hematite |
| CN101767057A (en) * | 2008-12-30 | 2010-07-07 | 中国地质科学院郑州矿产综合利用研究所 | Method for separating aluminum and iron in high-iron bauxite |
| CN102179303A (en) * | 2011-03-07 | 2011-09-14 | 江苏旌凯中科超导高技术有限公司 | Magnetic agglomeration magnetic separation separation frame structure |
| CN102912111A (en) * | 2012-09-12 | 2013-02-06 | 北京矿冶研究总院 | Treatment method of oolitic hematite containing phosphorus |
| CN102974456A (en) * | 2012-12-11 | 2013-03-20 | 中国地质科学院矿产综合利用研究所 | Separation process of refractory iron ore |
| CN104874478A (en) * | 2015-06-01 | 2015-09-02 | 中国地质科学院郑州矿产综合利用研究所 | Vibrating magnetic field screening machine |
| CN105057086A (en) * | 2015-07-20 | 2015-11-18 | 华北理工大学 | Processing method for fine-grained disseminated rutile ore difficult to separate |
-
2016
- 2016-05-11 CN CN201610138658.8A patent/CN105689126B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3829029A (en) * | 1971-01-21 | 1974-08-13 | Carborundum Co | Abrasive blast cleaning system |
| EP0237689A1 (en) * | 1986-02-28 | 1987-09-23 | MANNESMANN Aktiengesellschaft | Process for the production of finely divided fuel |
| CN101440416A (en) * | 2008-12-18 | 2009-05-27 | 周玉平 | Iron increase and phosphorous reduction method for oolitic high phosphorus hematite |
| CN101767057A (en) * | 2008-12-30 | 2010-07-07 | 中国地质科学院郑州矿产综合利用研究所 | Method for separating aluminum and iron in high-iron bauxite |
| CN101693222A (en) * | 2009-11-02 | 2010-04-14 | 贵州大学 | Method for separating oolitic hematite |
| CN102179303A (en) * | 2011-03-07 | 2011-09-14 | 江苏旌凯中科超导高技术有限公司 | Magnetic agglomeration magnetic separation separation frame structure |
| CN102912111A (en) * | 2012-09-12 | 2013-02-06 | 北京矿冶研究总院 | Treatment method of oolitic hematite containing phosphorus |
| CN102974456A (en) * | 2012-12-11 | 2013-03-20 | 中国地质科学院矿产综合利用研究所 | Separation process of refractory iron ore |
| CN104874478A (en) * | 2015-06-01 | 2015-09-02 | 中国地质科学院郑州矿产综合利用研究所 | Vibrating magnetic field screening machine |
| CN105057086A (en) * | 2015-07-20 | 2015-11-18 | 华北理工大学 | Processing method for fine-grained disseminated rutile ore difficult to separate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107365904A (en) * | 2017-07-11 | 2017-11-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycles technique |
| CN107377205A (en) * | 2017-07-11 | 2017-11-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A circulating non-dumping utilization process of iron ore suspension roasting magnetic separation flotation tailings |
| CN107365904B (en) * | 2017-07-11 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycling technique |
| CN107377205B (en) * | 2017-07-11 | 2019-03-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Circulating non-dumping utilization process for iron ore suspension roasting magnetic separation flotation tailings |
| CN109317289A (en) * | 2018-11-14 | 2019-02-12 | 王光领 | Dry sand medium preparation process is used on air dry sand Recognition Applied in Coal Preparation System |
| CN115055276A (en) * | 2022-06-09 | 2022-09-16 | 赣州金环磁选科技装备股份有限公司 | A kind of technological process of oolitic hematite physical beneficiation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105689126B (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104394993B (en) | A kind of pretreatment method of ilmenite iron beneficiation tailings | |
| CN107413490B (en) | A kind of method of phosphorus, iron and titanium mineral in synthetical recovery magmatic phosphate deposit | |
| CN108993766B (en) | Ore dressing treatment method for weathered ilmenite | |
| CN109894257B (en) | Comprehensive utilization method for spodumene beneficiation | |
| CN102225358B (en) | Ore dressing method of vanadium titanium magnetite | |
| WO2022032922A1 (en) | Series elutriation and deep beneficiation process for magnetite extremely difficult to be beneficiated | |
| CN103934077B (en) | High-efficiency low-consumption ultrafine crushing-grinding process | |
| CN106000639B (en) | A kind of Copper making converter residues processing technique containing high-grade matte | |
| CN101502819A (en) | Pre-selection method of low-ore grade magnetic iron ore | |
| CN113941433B (en) | Ore dressing method for cascade recovery and segmented tailing discarding of low-grade chromite | |
| CN109718947A (en) | Microfine magnetic-red compound iron ore magnetic-floats beneficiation combined method method | |
| CN109985723A (en) | A kind of beneficiation method of microfine magnetic-red compound iron ore | |
| CN105689126A (en) | A kind of beneficiation process of oolitic hematite | |
| CN112206919A (en) | Beneficiation method for obtaining blocky manganese concentrate | |
| CN108393191A (en) | A kind of novel magnetic iron ore sorting process | |
| CN109894267B (en) | Magnetic-gravity separation method for magnetic-hematite mixed iron ore | |
| CN114178046B (en) | Beneficiation method for pyrochlore | |
| CN110694787B (en) | Effective recovery process for associated niobium and tantalum in rare metal ore | |
| CN114130523B (en) | Preselection process of high-mud hematite ore | |
| CN102886301B (en) | Hematite beneficiation method | |
| CN113042180B (en) | Method for recovering rare earth from heterolite | |
| CN109127122A (en) | A kind of magnetite concentrate proposes the beneficiation method of Fe and reducing Si | |
| CN219003346U (en) | Ore dressing device for iron ore rich in barite | |
| CN110216009A (en) | A kind of dressing method of steel slag | |
| CN115999758B (en) | Beneficiation method for lithium clay ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 071051 900 Xiangyang North Street, Baoding, Hebei. Patentee after: Geological experiment test center of Hebei province Address before: 071000 156 Baihua East Road, Baoding, Hebei Patentee before: HEBEI GEOLOGICAL AND MINERAL CENTRAL LABORATORY |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |