CN108031546B - A method for recovering iron from red mud - Google Patents
A method for recovering iron from red mud Download PDFInfo
- Publication number
- CN108031546B CN108031546B CN201711447513.7A CN201711447513A CN108031546B CN 108031546 B CN108031546 B CN 108031546B CN 201711447513 A CN201711447513 A CN 201711447513A CN 108031546 B CN108031546 B CN 108031546B
- Authority
- CN
- China
- Prior art keywords
- red mud
- concentrate
- magnetic
- magnetic separator
- ore
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000012141 concentrate Substances 0.000 claims abstract description 49
- 238000000227 grinding Methods 0.000 claims abstract description 22
- 239000006148 magnetic separator Substances 0.000 claims description 47
- 238000004064 recycling Methods 0.000 claims description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 230000018044 dehydration Effects 0.000 claims description 14
- 238000006297 dehydration reaction Methods 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000010410 dusting Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000008719 thickening Effects 0.000 claims 1
- 238000007885 magnetic separation Methods 0.000 abstract description 20
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 229910001608 iron mineral Inorganic materials 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 9
- 238000001914 filtration Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Processing Of Solid Wastes (AREA)
- Paper (AREA)
Abstract
Description
技术领域technical field
本发明涉及氧化铝赤泥资源化利用领域，具体是一种赤泥回收铁的方法。The invention relates to the field of resource utilization of alumina red mud, in particular to a method for recovering iron from red mud.
背景技术Background technique
赤泥是制铝产业中从铝土矿中提取氧化铝后产生的红褐色泥状固体工业废物。一般平均每生产1吨氧化铝，附带产生1.0～2.0吨赤泥。Red mud is reddish-brown muddy solid industrial waste produced after extracting alumina from bauxite in the aluminum industry. Generally, for every ton of alumina produced, 1.0 to 2.0 tons of red mud will be produced incidentally.
中国作为世界第4大氧化铝生产国，每年排放的赤泥高达数百万吨。大量的赤泥不能充分有效的利用，只能依靠大面积的堆场堆放，赤泥的堆积不仅占有土地资源，而且赤泥中的碱、钠、铝、氟化物以及稀有金属等，将会随着渗滤液进入地下水，对人体造成一定的伤害。此外，赤泥的高碱性也会污染水，对人和动植物产生一定危害。赤泥的产生已经对人类的生产、生活造成多方面的直接和间接的影响，所以最大限度的减少赤泥的产量和危害，实现多渠道、大数量的资源化已迫在眉睫。因此如何将赤泥变废为宝，废物利用，化有害为有利，减少对自然的污染已经引起了各界科研工作者的关注。As the world's fourth largest producer of alumina, China discharges millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized, and can only be stacked in a large area. The accumulation of red mud not only occupies land resources, but also the alkali, sodium, aluminum, fluoride and rare metals in the red mud will be lost with time. The leachate enters the groundwater and causes certain harm to the human body. In addition, the high alkalinity of red mud will also pollute water, causing certain harm to humans, animals and plants. The generation of red mud has caused direct and indirect impacts on human production and life in many aspects, so it is imminent to minimize the output and hazards of red mud and realize multi-channel and large-scale resource utilization. Therefore, how to turn red mud from waste into wealth, utilize waste, turn harmful into beneficial, and reduce pollution to nature has attracted the attention of scientific researchers from all walks of life.
现有技术从赤泥中回收铁精矿的方法主要有三种：一是通过磁选法，专利CN101648159A公开一种利用中磁机回收强磁性铁和高梯度磁选机回收弱磁性铁相结合的工艺从赤泥中回收铁精矿的方法，此方法存在铁回收率低的问题。二是直接还原焙烧，专利CN103074456A公开一种通过干燥、制球、添加焦炭等添加剂在高炉中直接进行熔炼得到铁的方法，此方法存在能耗高的问题。三是磁选和培烧联合，专利CN102626670A公开一种回转窑磁化焙烧处理赤泥制备铁精粉的方法，这种方法对铁含量在30%以下的赤泥存在能源消耗大的问题，且焙烧后磁选过程中微细粒夹带会导致铁精矿品位偏低。In the prior art, there are mainly three methods for recovering iron concentrate from red mud: one is through magnetic separation, and patent CN101648159A discloses a combination of using a medium magnetic machine to recover strong magnetic iron and a high gradient magnetic separator to recover weak magnetic iron. The process is a method for recovering iron concentrate from red mud, which has the problem of low iron recovery rate. The second is direct reduction roasting. Patent CN103074456A discloses a method of directly smelting iron in a blast furnace by drying, pelletizing, adding coke and other additives. This method has the problem of high energy consumption. The third is the combination of magnetic separation and roasting. Patent CN102626670A discloses a method for preparing iron powder by magnetizing and roasting red mud in a rotary kiln. This method has the problem of large energy consumption for red mud with an iron content below 30%, and roasting The entrainment of fine particles in the post-magnetic separation process will lead to low grade iron concentrate.
发明内容Contents of the invention
本发明的目的在于提供一种赤泥回收铁的方法，以解决上述背景技术中存在的问题。The purpose of the present invention is to provide a method for recovering iron from red mud, so as to solve the problems existing in the above-mentioned background technology.
本发明的技术方案是这样实现的：Technical scheme of the present invention is realized like this:
一种赤泥回收铁的方法，包括以下步骤：A method for recovering iron from red mud, comprising the following steps:
（1）将赤泥送入脱泥摇床进行脱泥，得到摇床尾矿和摇床精矿；(1) Send the red mud to the desliming shaker for desliming to obtain shaker tailings and shaker concentrate;
（2）将步骤（1）摇床精矿送入振动筛进行分级，得到筛上+0.074mm矿浆和筛下-0.074mm矿浆；(2) Send the shaker concentrate in step (1) into the vibrating screen for classification, and obtain +0.074mm pulp on the screen and -0.074mm pulp on the screen;
（3）将步骤（2）筛上+0.074mm矿浆送入磁选机一进行选别，得到磁选尾矿和磁选精矿；(3) Send the +0.074mm ore pulp on the sieve in step (2) to the magnetic separator for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（4）将步骤（3）磁选精矿送入球磨机进行磨矿；(4) Send the magnetically separated concentrate in step (3) into a ball mill for grinding;
（5）将步骤（4）球磨机排矿送入水力旋流器进行分级，水力旋流器底流返回球磨机，水力旋流器溢流送入磁选机二进行选别；(5) Send the ore discharge from the ball mill in step (4) to the hydrocyclone for classification, the underflow of the hydrocyclone returns to the ball mill, and the overflow of the hydrocyclone is sent to the second magnetic separator for separation;
（6）将步骤（5）磁选机二精矿送入塔磨机进行磨矿；(6) Send the secondary concentrate of the magnetic separator in step (5) into the tower mill for grinding;
（7）将步骤（6）塔磨机排矿送入磁选机三进行选别，得到磁选尾矿和磁选精矿；(7) Send the ore discharge of the tower mill in step (6) to the third magnetic separator for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（8）将步骤（7）磁选机三精矿送入细筛进行分级，得到筛上+0.045mm尾矿浆和筛下-0.045mm精矿浆；(8) Send the third concentrate of the magnetic separator in step (7) into a fine sieve for grading, and obtain +0.045mm tailings pulp on the screen and -0.045mm concentrate pulp on the screen;
（9）将步骤（1）摇床尾矿、步骤（2）筛下-0.074mm矿浆、步骤（3）磁选机一尾矿、步骤（5）磁选机二尾矿一起送入浓缩机进行浓缩脱水，浓缩机底流送到堆场堆存，溢流返回氧化铝厂循环利用；(9) Send the tailings of step (1) shaking table, step (2) under-sieve -0.074mm ore pulp, step (3) tailings of magnetic separator 1, and step (5) tailings of magnetic separator 2 into the concentrator for further processing Concentration and dehydration, the underflow of the thickener is sent to the storage yard for storage, and the overflow is returned to the alumina plant for recycling;
（10）将步骤（7）磁选机三尾矿和步骤（8）筛上+0.045mm矿浆一起送入过滤机一进行过滤脱水，将过滤机一底流用于水泥生产原料，将过滤机一溢流返回氧化铝厂循环利用；(10) Send the third tailings of the magnetic separator in step (7) and the +0.045mm slurry on the sieve in step (8) to the first filter for filtration and dehydration, use the bottom flow of the first filter for raw materials for cement production, and use the first overflow of the filter The stream is returned to the alumina plant for recycling;
（11）将步骤（8）筛下-0.045mm矿浆送入过滤机二进行过滤脱水，得到底流铁精矿产品，将过滤机二溢流返回氧化铝厂循环利用。(11) Send the -0.045mm ore pulp under the sieve in step (8) to the second filter for filtration and dehydration to obtain bottom flow iron ore concentrate products, and return the overflow of the second filter to the alumina plant for recycling.
优选地，所述步骤（1）脱泥摇床给矿浓度为20%~25%。Preferably, in the step (1), the concentration of ore fed to the desliming shaker is 20% to 25%.
优选地，所述步骤（3）磁选机一磁场强度为1.3T~1.5T。Preferably, the magnetic field strength of the magnetic separator in step (3) is 1.3T~1.5T.
优选地，所述步骤（4）球磨机磨矿浓度为70%~75%。Preferably, the grinding concentration of the ball mill in the step (4) is 70%-75%.
优选地，所述步骤（5）水力旋利器溢流-0.074mm75%~85%。Preferably, the step (5) hydrocyclone overflow -0.074mm75%~85%.
优选地，所述步骤（5）磁选机二磁场强度为1.0T~1.2T。Preferably, the magnetic field strength of the second magnetic separator in the step (5) is 1.0T~1.2T.
优选地，所述步骤（6）塔磨机磨矿浓度为65%~70%，排矿细度为-0.045mm80%~85%。Preferably, in the step (6), the grinding concentration of the tower mill is 65%-70%, and the ore discharge fineness is -0.045mm80%-85%.
优选地，所述步骤（7）磁选机三磁场强度为0.8T~1.0T。Preferably, the magnetic field strength of the third magnetic separator in step (7) is 0.8T~1.0T.
本发明的有益效果为：The beneficial effects of the present invention are:
本发明采用摇床脱泥、振动筛分级、强磁富集的工艺对赤泥进行预先处理富集，然后采用阶段磨矿-磁选-细筛的工艺回收铁矿物，整个工艺流程处理量大，铁精矿品位高、回收率高，能耗低，成本低，可以将赤泥中的铁回收利用，提高资源利用率，同时减少赤泥占地，减少环境污染，具有较好的社会效益和经济效益。The present invention adopts the technology of shaker desliming, vibrating screen classification, and strong magnetic enrichment to pre-treat and enrich the red mud, and then adopts the process of stage grinding-magnetic separation-fine sieve to recover iron minerals, and the processing capacity of the whole process flow Large, high-grade iron concentrate, high recovery rate, low energy consumption, low cost, can recycle iron in red mud, improve resource utilization, reduce red mud land occupation, reduce environmental pollution, and have a good social benefits and economic benefits.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍，显而易见，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为本发明一种赤泥回收铁的方法流程示意图。Fig. 1 is a schematic flow chart of a method for recovering iron from red mud according to the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述地实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
实施例1Example 1
本实施例提供了赤泥回收铁的方法，包括以下步骤：The present embodiment provides the method for recovering iron from red mud, comprising the following steps:
（1）将赤泥送入脱泥摇床进行脱泥，摇床给矿浓度为20%，得到摇床尾矿和摇床精矿；(1) The red mud is sent to the desliming shaker for desliming, and the concentration of the shaker is 20%, and the shaker tailings and the shaker concentrate are obtained;
（2）将步骤（1）摇床精矿送入振动筛进行分级，得到筛上+0.074mm矿浆和筛下-0.074mm矿浆；(2) Send the shaker concentrate in step (1) into the vibrating screen for classification, and obtain +0.074mm pulp on the screen and -0.074mm pulp on the screen;
（3）将步骤（2）筛上+0.074mm矿浆送入磁场强度为1.3T磁选机一进行选别，得到磁选尾矿和磁选精矿；(3) Send the +0.074mm ore slurry on the sieve in step (2) to a magnetic separator with a magnetic field strength of 1.3T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（4）将步骤（3）磁选精矿送入球磨机进行磨矿，磨矿浓度为70%。；(4) Send the magnetically separated concentrate in step (3) into a ball mill for grinding with a grinding concentration of 70%. ;
（5）将步骤（4）球磨机排矿送入水力旋流器进行分级，水力旋流器底流返回球磨机，水力旋流器-0.074mm75%溢流送入磁场强度为1.0T磁选机二进行选别；(5) Send the ore discharge from the ball mill in step (4) to the hydrocyclone for classification, the underflow of the hydrocyclone returns to the ball mill, and the -0.074mm75% overflow of the hydrocyclone is sent to the second magnetic separator with a magnetic field strength of 1.0T. Sorting;
（6）将步骤（5）磁选机二精矿送入塔磨机进行磨矿，磨矿浓度为65%，排矿细度为-0.045mm80%；(6) Send the second concentrate of the magnetic separator in step (5) into the tower mill for grinding, the grinding concentration is 65%, and the ore discharge fineness is -0.045mm80%;
（7）将步骤（6）塔磨机排矿送入磁场强度为0.8T磁选机三进行选别，得到磁选尾矿和磁选精矿；(7) Send the ore discharge of the tower mill in step (6) into the third magnetic separator with a magnetic field strength of 0.8T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（8）将步骤（7）磁选机三精矿送入细筛进行分级，得到筛上+0.045mm尾矿浆和筛下-0.045mm精矿浆；(8) Send the third concentrate of the magnetic separator in step (7) into a fine sieve for grading, and obtain +0.045mm tailings pulp on the screen and -0.045mm concentrate pulp on the screen;
（9）将步骤（1）摇床尾矿、步骤（2）筛下-0.074mm矿浆、步骤（3）磁选机一尾矿、步骤（5）磁选机二尾矿一起送入浓缩机进行浓缩脱水，浓缩机底流送到堆场堆存，溢流返回氧化铝厂循环利用；(9) Send the tailings of step (1) shaking table, step (2) under-sieve -0.074mm ore pulp, step (3) tailings of magnetic separator 1, and step (5) tailings of magnetic separator 2 into the concentrator for further processing Concentration and dehydration, the underflow of the thickener is sent to the storage yard for storage, and the overflow is returned to the alumina plant for recycling;
（10）将步骤（7）磁选机三尾矿和步骤（8）筛上+0.045mm矿浆一起送入过滤机一进行过滤脱水，将过滤机一底流用于水泥生产原料，将过滤机一溢流返回氧化铝厂循环利用；(10) Send the third tailings of the magnetic separator in step (7) and the +0.045mm slurry on the sieve in step (8) to the first filter for filtration and dehydration, use the bottom flow of the first filter for raw materials for cement production, and use the first overflow of the filter The stream is returned to the alumina plant for recycling;
（11）将步骤（8）筛下-0.045mm矿浆送入过滤机二进行过滤脱水，得到底流铁精矿产品，将过滤机二溢流返回氧化铝厂循环利用。(11) Send the -0.045mm ore pulp under the sieve in step (8) to the second filter for filtration and dehydration to obtain bottom flow iron ore concentrate products, and return the overflow of the second filter to the alumina plant for recycling.
本实施例可以回收得到铁品位58.05%，回收率44.21%。可以将赤泥中的铁回收利用，提高资源利用率，同时减少赤泥占地，减少环境污染。In this embodiment, the iron grade of 58.05% can be recovered, and the recovery rate is 44.21%. The iron in the red mud can be recycled to improve the utilization rate of resources, and at the same time reduce the land occupation of the red mud and reduce environmental pollution.
实施例2Example 2
本实施例提供了赤泥回收铁的方法，包括以下步骤：The present embodiment provides the method for recovering iron from red mud, comprising the following steps:
（1）将赤泥送入脱泥摇床进行脱泥，摇床给矿浓度为22%，得到摇床尾矿和摇床精矿；(1) The red mud is sent to the desliming shaker for desliming, and the concentration of the shaker feed is 22%, and the shaker tailings and the shaker concentrate are obtained;
（2）将步骤（1）摇床精矿送入振动筛进行分级，得到筛上+0.074mm矿浆和筛下-0.074mm矿浆；(2) Send the shaker concentrate in step (1) into the vibrating screen for classification, and obtain +0.074mm pulp on the screen and -0.074mm pulp on the screen;
（3）将步骤（2）筛上+0.074mm矿浆送入磁场强度为1.4T磁选机一进行选别，得到磁选尾矿和磁选精矿；(3) Send the +0.074mm ore slurry on the sieve in step (2) to a magnetic separator with a magnetic field strength of 1.4T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（4）将步骤（3）磁选精矿送入球磨机进行磨矿，磨矿浓度为73%。；(4) Send the magnetically separated concentrate in step (3) into a ball mill for grinding with a grinding concentration of 73%. ;
（5）将步骤（4）球磨机排矿送入水力旋流器进行分级，水力旋流器底流返回球磨机，水力旋流器-0.074mm80%溢流送入磁场强度为1.1T磁选机二进行选别；(5) Send the ore discharge from the ball mill in step (4) to the hydrocyclone for classification, the bottom flow of the hydrocyclone returns to the ball mill, and the -0.074mm80% overflow of the hydrocyclone is sent to the second magnetic separator with a magnetic field strength of 1.1T. Sorting;
（6）将步骤（5）磁选机二精矿送入塔磨机进行磨矿，磨矿浓度为68%，排矿细度为-0.045mm83%；(6) Send the second concentrate of the magnetic separator in step (5) into the tower mill for grinding, the grinding concentration is 68%, and the ore discharge fineness is -0.045mm83%;
（7）将步骤（6）塔磨机排矿送入磁场强度为0.9T磁选机三进行选别，得到磁选尾矿和磁选精矿；(7) Send the ore discharge of the tower mill in step (6) into the third magnetic separator with a magnetic field strength of 0.9T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（8）将步骤（7）磁选机三精矿送入细筛进行分级，得到筛上+0.045mm尾矿浆和筛下-0.045mm精矿浆；(8) Send the third concentrate of the magnetic separator in step (7) into a fine sieve for grading, and obtain +0.045mm tailings pulp on the screen and -0.045mm concentrate pulp on the screen;
（9）将步骤（1）摇床尾矿、步骤（2）筛下-0.074mm矿浆、步骤（3）磁选机一尾矿、步骤（5）磁选机二尾矿一起送入浓缩机进行浓缩脱水，浓缩机底流送到堆场堆存，溢流返回氧化铝厂循环利用；(9) Send the tailings of step (1) shaking table, step (2) under-sieve -0.074mm ore pulp, step (3) tailings of magnetic separator 1, and step (5) tailings of magnetic separator 2 into the concentrator for further processing Concentration and dehydration, the underflow of the thickener is sent to the storage yard for storage, and the overflow is returned to the alumina plant for recycling;
（10）将步骤（7）磁选机三尾矿和步骤（8）筛上+0.045mm矿浆一起送入过滤机一进行过滤脱水，将过滤机一底流用于水泥生产原料，将过滤机一溢流返回氧化铝厂循环利用；(10) Send the third tailings of the magnetic separator in step (7) and the +0.045mm slurry on the sieve in step (8) to the first filter for filtration and dehydration, use the bottom flow of the first filter for raw materials for cement production, and use the first overflow of the filter The stream is returned to the alumina plant for recycling;
（11）将步骤（8）筛下-0.045mm矿浆送入过滤机二进行过滤脱水，得到底流铁精矿产品，将过滤机二溢流返回氧化铝厂循环利用。(11) Send the -0.045mm ore pulp under the sieve in step (8) to the second filter for filtration and dehydration to obtain bottom flow iron ore concentrate products, and return the overflow of the second filter to the alumina plant for recycling.
本实施例可以回收得到铁品位59.11%，回收率45.18%。可以将赤泥中的铁回收利用，提高资源利用率，同时减少赤泥占地，减少环境污染。In this embodiment, an iron grade of 59.11% can be recovered and a recovery rate of 45.18%. The iron in the red mud can be recycled to improve the utilization rate of resources, and at the same time reduce the land occupation of the red mud and reduce environmental pollution.
实施例3Example 3
本实施例提供了赤泥回收铁的方法，包括以下步骤：The present embodiment provides the method for recovering iron from red mud, comprising the following steps:
（1）将赤泥送入脱泥摇床进行脱泥，摇床给矿浓度为25%，得到摇床尾矿和摇床精矿；(1) The red mud is sent to the desliming shaker for desliming, and the concentration of the shaker feed is 25%, and the shaker tailings and the shaker concentrate are obtained;
（2）将步骤（1）摇床精矿送入振动筛进行分级，得到筛上+0.074mm矿浆和筛下-0.074mm矿浆；(2) Send the shaker concentrate in step (1) into the vibrating screen for classification, and obtain +0.074mm pulp on the screen and -0.074mm pulp on the screen;
（3）将步骤（2）筛上+0.074mm矿浆送入磁场强度为1.5T磁选机一进行选别，得到磁选尾矿和磁选精矿；(3) Send the +0.074mm ore slurry on the sieve in step (2) to a magnetic separator with a magnetic field strength of 1.5T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（4）将步骤（3）磁选精矿送入球磨机进行磨矿，磨矿浓度为75%。；(4) Send the magnetically separated ore concentrate from step (3) into a ball mill for grinding with a grinding concentration of 75%. ;
（5）将步骤（4）球磨机排矿送入水力旋流器进行分级，水力旋流器底流返回球磨机，水力旋流器-0.074mm85%溢流送入磁场强度为1.2T磁选机二进行选别；(5) Send the ore discharge from the ball mill in step (4) to the hydrocyclone for grading, the underflow of the hydrocyclone returns to the ball mill, and the -0.074mm85% overflow of the hydrocyclone is sent to the second magnetic separator with a magnetic field strength of 1.2T. Sorting;
（6）将步骤（5）磁选机二精矿送入塔磨机进行磨矿，磨矿浓度为70%，排矿细度为-0.045mm85%；(6) Send the second concentrate of the magnetic separator in step (5) into the tower mill for grinding, the grinding concentration is 70%, and the ore discharge fineness is -0.045mm85%;
（7）将步骤（6）塔磨机排矿送入磁场强度为1.0T磁选机三进行选别，得到磁选尾矿和磁选精矿；(7) Send the ore discharge of the tower mill in step (6) into a magnetic separator with a magnetic field strength of 1.0T for separation to obtain magnetic separation tailings and magnetic separation concentrate;
（8）将步骤（7）磁选机三精矿送入细筛进行分级，得到筛上+0.045mm尾矿浆和筛下-0.045mm精矿浆；(8) Send the third concentrate of the magnetic separator in step (7) into a fine sieve for grading, and obtain +0.045mm tailings pulp on the screen and -0.045mm concentrate pulp on the screen;
（9）将步骤（1）摇床尾矿、步骤（2）筛下-0.074mm矿浆、步骤（3）磁选机一尾矿、步骤（5）磁选机二尾矿一起送入浓缩机进行浓缩脱水，浓缩机底流送到堆场堆存，溢流返回氧化铝厂循环利用；(9) Send the tailings of step (1) shaking table, step (2) under-sieve -0.074mm ore pulp, step (3) tailings of magnetic separator 1, and step (5) tailings of magnetic separator 2 into the concentrator for further processing Concentration and dehydration, the underflow of the thickener is sent to the storage yard for storage, and the overflow is returned to the alumina plant for recycling;
（10）将步骤（7）磁选机三尾矿和步骤（8）筛上+0.045mm矿浆一起送入过滤机一进行过滤脱水，将过滤机一底流用于水泥生产原料，将过滤机一溢流返回氧化铝厂循环利用；(10) Send the third tailings of the magnetic separator in step (7) and the +0.045mm slurry on the sieve in step (8) to the first filter for filtration and dehydration, use the bottom flow of the first filter for raw materials for cement production, and use the first overflow of the filter The stream is returned to the alumina plant for recycling;
（11）将步骤（8）筛下-0.045mm矿浆送入过滤机二进行过滤脱水，得到底流铁精矿产品，将过滤机二溢流返回氧化铝厂循环利用。(11) Send the -0.045mm ore pulp under the sieve in step (8) to the second filter for filtration and dehydration to obtain bottom flow iron ore concentrate products, and return the overflow of the second filter to the alumina plant for recycling.
本实施例可以回收得到铁品位60.07%，回收率46.01%。可以将赤泥中的铁回收利用，提高资源利用率，同时减少赤泥占地，减少环境污染。In this embodiment, an iron grade of 60.07% can be recovered and a recovery rate of 46.01%. The iron in the red mud can be recycled to improve the utilization rate of resources, and at the same time reduce the land occupation of the red mud and reduce environmental pollution.
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，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，均应包含在本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447513.7A CN108031546B (en) | 2017-12-27 | 2017-12-27 | A method for recovering iron from red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711447513.7A CN108031546B (en) | 2017-12-27 | 2017-12-27 | A method for recovering iron from red mud |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108031546A CN108031546A (en) | 2018-05-15 |
| CN108031546B true CN108031546B (en) | 2019-11-05 |
Family
ID=62097537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711447513.7A Active CN108031546B (en) | 2017-12-27 | 2017-12-27 | A method for recovering iron from red mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108031546B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439023A (en) * | 2018-11-07 | 2019-03-08 | 张勇 | A technique for functional filler production is carried out using red mud |
| US10851007B1 (en) | 2019-08-06 | 2020-12-01 | Red Mud Enterprises Llc | System for processing Red Mud and method of processing Red Mud |
| CN116618171A (en) * | 2023-04-23 | 2023-08-22 | 中铝郑州有色金属研究院有限公司 | A method for recovering aluminum-containing minerals in Bayer process red mud iron separation tailings |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368440A (en) * | 2014-09-30 | 2015-02-25 | 中国铝业股份有限公司 | Novel technology and device for Bayer process-based separation of iron in high-iron red mud |
| CN204866160U (en) * | 2015-08-06 | 2015-12-16 | 山东宏桥新型材料有限公司 | Aluminium oxide is abandoned red mud and is selected iron to select sand system |
| CN105214832A (en) * | 2015-10-28 | 2016-01-06 | 山东科技大学 | A kind of gravity separation method red mud efficiently selects iron system and technique |
| CN106180734A (en) * | 2016-08-01 | 2016-12-07 | 江苏省冶金设计院有限公司 | Prepare the method and system of iron powder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2427430C1 (en) * | 2010-04-08 | 2011-08-27 | Открытое акционерное общество "Михайловский ГОК" | Method of extracting haematite from composite iron ore wet magnetic separation tailings |
| US20140262968A1 (en) * | 2013-03-15 | 2014-09-18 | Fritz Enterprises, Inc. | System and method for recovery of valuable constituents from steel-making slag fines |
-
2017
- 2017-12-27 CN CN201711447513.7A patent/CN108031546B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104368440A (en) * | 2014-09-30 | 2015-02-25 | 中国铝业股份有限公司 | Novel technology and device for Bayer process-based separation of iron in high-iron red mud |
| CN204866160U (en) * | 2015-08-06 | 2015-12-16 | 山东宏桥新型材料有限公司 | Aluminium oxide is abandoned red mud and is selected iron to select sand system |
| CN105214832A (en) * | 2015-10-28 | 2016-01-06 | 山东科技大学 | A kind of gravity separation method red mud efficiently selects iron system and technique |
| CN106180734A (en) * | 2016-08-01 | 2016-12-07 | 江苏省冶金设计院有限公司 | Prepare the method and system of iron powder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108031546A (en) | 2018-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109894257B (en) | Comprehensive utilization method for spodumene beneficiation | |
| CN105268544B (en) | A kind of wide grade Coaseries kaolin process for upgrading based on fluidization sorting | |
| CN102688804B (en) | Method for recycling metal iron from steel slag of converter | |
| CN103230832B (en) | Mineral processing method for recovering fine-grained iron from iron oxide ore strong magnetic separation tailings | |
| CN101318159B (en) | Process for recycling Anshan type lean octahedral iron ore mine tailing | |
| CN106000639B (en) | A kind of Copper making converter residues processing technique containing high-grade matte | |
| CN101664715A (en) | Ore-dressing technique capable of effectively improving comprehensive utilization rate of mine resources | |
| CN102259052A (en) | Process for re-cleaning reverse flotation tailings of hematite | |
| CN105381866B (en) | Iron, the beneficiation method of carbon are extracted from furnace cloth bag dust-removing ash | |
| CN113102093B (en) | Efficient multi-component phosphorite resource utilization method | |
| CN105312148A (en) | Beneficiation and enrichment method suitable for associated scheelite in molybdenite flotation tailings | |
| CN104437833B (en) | A kind of method of physical upgrading enrichment carbonaceous shale type navajoite | |
| CN102284353A (en) | Method for recovering tungsten-tin metal from ethylene-propylene terpolymerisate (APT) wastes | |
| CN115532427B (en) | Echelon recycling and large-scale digestion method for copper mine tailings | |
| CN103920582B (en) | A kind of closed circuit grading technology being applicable to Bed for Fine Coal classification | |
| CN107583764A (en) | Beneficiation method for recovering mica from copper ore tailings | |
| CN105195427B (en) | A kind of iron ore dry separation technique based on dense gas solid bed | |
| CN108031546B (en) | A method for recovering iron from red mud | |
| WO2024045687A2 (en) | Method for pre-selection and discarding and reducing over-grinding of gold ores | |
| CN108993760A (en) | A kind of low-grade difficulty of weathering selects manganese ore sorting process | |
| CN100430145C (en) | Method for magnetic separating of aluminum and iron in high iron bauxite | |
| CN106391296B (en) | A kind of gravity ore dressing method of particulate antimony oxide ore | |
| CN116273440A (en) | A kind of beneficiation process for recovering iron lepidolite and associated rubidium and cesium | |
| CN104437828A (en) | Efficient desulfuration and deashing dense medium separation technology for fine coal | |
| CN108704761A (en) | A method of preparing plank quartz using beach quartz sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |