WO2007009375A1 - Method for filtering and washing crude red mud - Google Patents

Method for filtering and washing crude red mud Download PDF

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Publication number
WO2007009375A1
WO2007009375A1 PCT/CN2006/001741 CN2006001741W WO2007009375A1 WO 2007009375 A1 WO2007009375 A1 WO 2007009375A1 CN 2006001741 W CN2006001741 W CN 2006001741W WO 2007009375 A1 WO2007009375 A1 WO 2007009375A1
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red mud
washing
filter
zone
coarse
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PCT/CN2006/001741
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French (fr)
Chinese (zh)
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De Chen
Shutao Xu
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China Aluminum International Engineering Corporation Limited
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
    • C01F7/066—Treatment of the separated residue
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0015—Obtaining aluminium by wet processes
    • C22B21/0023—Obtaining aluminium by wet processes from waste materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to an alumina production process, which is suitable for coarse red mud filtration washing of high-iron trihydrate bauxite.
  • China's existing alumina plants mainly use diaspore as raw materials, and a few alumina plants also use gibbsite mines imported from abroad. Under normal circumstances, the ore is ground finely. The ground ore slurry after grinding is separated and washed by dissolution, dilution and red mud sedimentation. The bottom of the final sedimentation tank is filtered by a plate filter press or a cylinder filter. After filtration, The red mud was sent to the red mud yard for storage.
  • the high-speed rail Sanshui bauxite mine in Guangxi is a new type of mineral resource. It contains two useful minerals, alumina and iron. The iron oxide content in the ore is greater than the alumina content. From the smelting process, if it is recovered from a single source, Any kind of mineral is uneconomical, and aluminum and iron must be recycled at the same time to have higher economic benefits. Similar high-speed rail trihydrate bauxite mines are also found in other countries and regions such as Vietnam.
  • the alumina in the ore can be dissolved smoothly by using low temperature, normal pressure and low alkali concentration dissolution conditions.
  • concentration of the dissolved alkali, the temperature, and the fine grinding of the ore are further increased, the dissolution rate of the alumina is not increased, but the silicon mineral in the ore is involved in the chemical reaction, the alkali consumption is increased, and the dissolution rate of the alumina is lowered.
  • the red mud particle size after dissolution is relatively coarse. If the sedimentation tank is used for separation and washing directly, the ratio of coarse red mud is large and the sedimentation speed is fast. Due to the slow stirring speed of the settling tank, the coarse red mud will be blocked at the bottom of the tank and the sedimentation tank will not work normally.
  • the ore content of the ore is low, the ore consumption per unit of product is large, and the output per ton of alumina is
  • the amount of red mud is 4-5 times that of the existing alumina plant, reaching 4.5 ⁇ 5 ⁇ 0 t/t - Al 2 0 3 , for such a high amount of red mud, and the process must control the amount of red mud washing water. According to this condition, the existing settling tank cannot be operated normally due to the liquid-solid ratio of the feed and the water washing index, and a new red mud treatment process must be adopted.
  • the object of the invention is to propose a shredded red mud splitting treatment, the coarse red mud is filtered and washed by a flat plate filter or a horizontal belt filter, and the fine red mud is filtered and washed by a conventional settling tank, which can solve the red mud separation and washing. problem.
  • the invention is realized as follows: the crude red mud slurry from the red mud classification process is filtered into a horizontal belt filter or a flat disk filter, and the distribution head on the filter divides the whole filter into a separation zone, In the washing zone, the solution obtained in the separation zone is called the crude liquid, and is sent to the desiliconization process; the filter cake in the separation zone enters the washing zone and is subjected to reverse washing; the washed red mud washing liquid is sent to the dissolution process, and the washed red The mud is sent to the sponge iron factory to recover iron from the red mud.
  • the main technical indicators of the coarse red mud filtration washing process are: the percentage of crude red mud to the total red mud is 58 ⁇ 63%, the filter feed solid content is 650 ⁇ 1000g / l, the washing water addition amount is 0.5 ⁇ 1.0t / t - red Mud, filter capacity 200 ⁇ 300g / l, filter cake moisture content 15 ⁇ 25%, filter on the reverse washing times 2 ⁇ 3 times, after washing the filter cake with alkali content "0.2%, washing water temperature 90 ⁇ 95TC.
  • Flat-plate filters or horizontal belt filters are widely used in the chemical and alumina industries. They are usually used in the liquid-solid separation process of coarse-grained materials. The advantages of this filter are: (1) Separation and two to three washing processes can be performed simultaneously on one filter.
  • the moisture content of the filter cake is low.
  • the moisture content of the filter cake is only about 8%.
  • the test shows that the crude red mud filtration performance of Guangxi high-speed rail Sanshui bauxite mine is similar to that of sand-like aluminum hydroxide.
  • the particles are coarse and have good gas permeability.
  • the filtration performance is very good.
  • the treatment utilizes the characteristics of good filtering performance.
  • This filter uses less washing water, which is very beneficial to the process. It is especially beneficial to the water balance of the Bayer cycle system. It is beneficial to increase the concentration of semen and reduce the burden of the evaporation process. If washing with a settling tank, the washing volume will reach 2.0 ⁇ 4.0t/t - red mud.
  • the water content of the filter cake is low, which is beneficial to the transport of the filter cake and the reduction of the alkali content in the filter cake, especially for the red mud used for iron making, because the sponge iron plant needs to dry and de-salt the red mud.
  • the coarse red mud has less water and low alkali content, which can reduce the burden on the iron plant drying process and save the sodium removal process.
  • the invention has the beneficial effects that the problem of separating and washing the crude red mud of the high-iron trihydrate bauxite mine is solved, the amount of washing water is reduced, and the comprehensive development benefit of the high-iron trihydrate bauxite mine is improved.
  • Embodiments of the present invention The coarse red mud slurry from the red mud classification process is filtered and washed into the horizontal belt filter of the present process, and the distribution head on the filter divides the whole filter into a separation zone and a washing zone.
  • the washing zone is further divided into a washing zone, a second washing zone and a third washing zone; the solution obtained in the separation zone is called crude liquid, and is sent to the desiliconization process; the filter cake in the separation zone enters the washing zone, and three reverse washings are performed; washing After the red mud washing liquid is sent to the dissolution process, the washed coarse red mud is sent to the sponge iron factory by the car, and the iron is recovered from the red mud.
  • the main technical indicators of the coarse red mud filtration washing process are: the percentage of crude red mud to the total red mud is 58 ⁇ 63%, the filter feed solid content is 750 ⁇ 950g / l, the washing water addition amount is 0.8t / t - red mud, The filter has a capacity of 200-300g/l, the filter cake has a moisture content of 20%, and the reverse washing time on the filter is 3 times. After washing, the filter cake has an alkali content of 0.2% and a washing water temperature of 90-951:.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a crude red mud filtrating and washing process, which consists of loading the crude red mud slurry from the red mud grading procedure into horizontal band filters or flat disc type filters for filtrating and washing, wherein a distribution head on the filters divides the whole filter into a separation zone and a washing zone, loading the crude liquor obtained in the separation zone into a desiliconization procedure, supplying the filter cakes from the separation area into the washing zone to proceed reversal washing for two to three times, loading the washed red mud cleaning solution to a dissolving procedure, loading the washed crude red mud to sponge ironworks for reclamation of iron.

Description

粗赤泥过滤洗涤新方法 技术领域：  New method for coarse red mud filtration washing
本发明涉及一种氧化铝生产工艺， 适用于高铁三水铝土矿的粗赤 泥过滤洗涤。  The invention relates to an alumina production process, which is suitable for coarse red mud filtration washing of high-iron trihydrate bauxite.
背景技术：  Background technique:
我国现有氧化铝厂主要以一水硬铝石为原料，少数氧化铝厂也使用 国外进口的三水铝石矿。 通常情况下， 矿石均磨得较细， 磨细后的原 矿浆经溶出、 稀释、 赤泥沉降分离洗涤， 末次洗涤沉降槽底流再用板 框压滤机或圆筒过滤机进行过滤， 过滤后赤泥送往赤泥堆场堆存。  China's existing alumina plants mainly use diaspore as raw materials, and a few alumina plants also use gibbsite mines imported from abroad. Under normal circumstances, the ore is ground finely. The ground ore slurry after grinding is separated and washed by dissolution, dilution and red mud sedimentation. The bottom of the final sedimentation tank is filtered by a plate filter press or a cylinder filter. After filtration, The red mud was sent to the red mud yard for storage.
广西地区的高铁三水铝土矿是一种新型的矿产资源， 同时含有氧 化铝和铁 2种有用矿物， 且矿石中氧化铁含量大于氧化铝含量， 从冶 炼工艺来说， 若单一回收其中的任何一种矿物均是不经济的， 必须铝 铁同时回收才有较高的经济效益。 越南等其他国家和地区也有类似的 高铁三水铝土矿。  The high-speed rail Sanshui bauxite mine in Guangxi is a new type of mineral resource. It contains two useful minerals, alumina and iron. The iron oxide content in the ore is greater than the alumina content. From the smelting process, if it is recovered from a single source, Any kind of mineral is uneconomical, and aluminum and iron must be recycled at the same time to have higher economic benefits. Similar high-speed rail trihydrate bauxite mines are also found in other countries and regions such as Vietnam.
此种类型的高铁三水铝土矿若采用先铝后铁方案， 先回收矿石中 氧化铝， 再从氧化铝的赤泥中回收铁， 是较好的方案之一。 高铁三水 铝土矿中的氧化铝溶出性能非常好， 经试验发现， 在磨矿产品细度为 If this type of high-iron trihydrate bauxite mine adopts the first aluminum post-iron scheme, it is one of the better schemes to recover the alumina in the ore and then recover the iron from the red mud of alumina. The high-iron trihydrate bauxite has a very good dissolution performance of alumina. It has been found through experiments that the fineness of the milled product is
20目时， 采用低温、 常压、 低碱浓度的溶出条件， 矿石中的氧化铝就 可顺利溶解出来。 当提高溶出碱浓度、 温度、 把矿石进一步磨细， 不 但不能提高氧化铝溶出率， 反而造成矿石中硅矿物参与化学反应， 造 成碱耗增加， 氧化铝溶出率降低。 At 20 mesh, the alumina in the ore can be dissolved smoothly by using low temperature, normal pressure and low alkali concentration dissolution conditions. When the concentration of the dissolved alkali, the temperature, and the fine grinding of the ore are further increased, the dissolution rate of the alumina is not increased, but the silicon mineral in the ore is involved in the chemical reaction, the alkali consumption is increased, and the dissolution rate of the alumina is lowered.
由于该矿石的磨矿粒度与现有氧化铝厂相比要粗得多， 经溶出后 的赤泥粒度也较粗， 若直接用沉降槽进行分离洗涤， 粗赤泥比重大、 沉降速度快， 由于沉降槽搅拌转速慢， 粗赤泥会堵塞在槽底无法出料， 造成沉降槽不能正常工作； 加之该矿石中氧化铝含量低， 单位产品的 矿石消耗量大， 每吨氧化铝产出的赤泥量是现有氧化铝厂的 4 ~ 5倍， 达 4.5 ~ 5·0 t/t - Al203, 对如此高的赤泥量， 而工艺上又要控制赤泥洗 水加入量， 按此条件考虑， 现有沉降槽因进料液固比及洗水指标限制， 是不能正常运行的， 必须采用新的赤泥处理新工艺。 发明内容： Since the ore grinding grain size of the ore is much coarser than that of the existing alumina plant, the red mud particle size after dissolution is relatively coarse. If the sedimentation tank is used for separation and washing directly, the ratio of coarse red mud is large and the sedimentation speed is fast. Due to the slow stirring speed of the settling tank, the coarse red mud will be blocked at the bottom of the tank and the sedimentation tank will not work normally. In addition, the ore content of the ore is low, the ore consumption per unit of product is large, and the output per ton of alumina is The amount of red mud is 4-5 times that of the existing alumina plant, reaching 4.5 ~ 5·0 t/t - Al 2 0 3 , for such a high amount of red mud, and the process must control the amount of red mud washing water. According to this condition, the existing settling tank cannot be operated normally due to the liquid-solid ratio of the feed and the water washing index, and a new red mud treatment process must be adopted. Summary of the invention:
本发明的目的在于： 提出粗细赤泥分流处理， 粗赤泥用平盘过滤 机或水平带式过滤机进行过滤洗涤， 细赤泥采用传统的沉降槽进行过 滤洗涤， 可解决赤泥分离洗涤的难题。  The object of the invention is to propose a shredded red mud splitting treatment, the coarse red mud is filtered and washed by a flat plate filter or a horizontal belt filter, and the fine red mud is filtered and washed by a conventional settling tank, which can solve the red mud separation and washing. problem.
本发明是这样实现的： 从赤泥分级工序来的粗赤泥料浆， 进入水 平带式过滤机或平盘过滤机进行过滤洗涤， 过滤机上的分配头将整台 过滤机划分为分离区、 洗涤区， 分离区得到的溶液称为粗液， 送往脱 硅工序； 分离区的滤饼进入洗涤区， 进行反向洗涤； 洗涤后的赤泥洗 液送往溶出工序， 洗涤后的粗赤泥送往海绵铁厂， 从赤泥中回收铁。  The invention is realized as follows: the crude red mud slurry from the red mud classification process is filtered into a horizontal belt filter or a flat disk filter, and the distribution head on the filter divides the whole filter into a separation zone, In the washing zone, the solution obtained in the separation zone is called the crude liquid, and is sent to the desiliconization process; the filter cake in the separation zone enters the washing zone and is subjected to reverse washing; the washed red mud washing liquid is sent to the dissolution process, and the washed red The mud is sent to the sponge iron factory to recover iron from the red mud.
粗赤泥过滤洗涤工序主要技术指标为： 粗赤泥占赤泥总量的百分 比 58 ~ 63%， 过滤机进料固含 650 ~ 1000g/l， 洗水加入量 0.5 ~ 1.0t/t - 赤泥， 过滤机产能 200 ~ 300g/l, 滤饼含水率 15 ~ 25%， 过滤机上反向 洗涤次数 2 ~ 3次， 洗涤后滤饼附碱含量《0.2% , 洗水温度 90 ~ 95TC。  The main technical indicators of the coarse red mud filtration washing process are: the percentage of crude red mud to the total red mud is 58 ~ 63%, the filter feed solid content is 650 ~ 1000g / l, the washing water addition amount is 0.5 ~ 1.0t / t - red Mud, filter capacity 200 ~ 300g / l, filter cake moisture content 15 ~ 25%, filter on the reverse washing times 2 ~ 3 times, after washing the filter cake with alkali content "0.2%, washing water temperature 90 ~ 95TC.
平盘过滤机或水平带式过滤机在化工和氧化铝工业上应用较多， 通常用于粗颗粒物料的液固分离工序， 该过滤机的优点是： （1 ) 、 一机多能， 在一台过滤机上能同时完成分离和二 ~三次洗涤过程。  Flat-plate filters or horizontal belt filters are widely used in the chemical and alumina industries. They are usually used in the liquid-solid separation process of coarse-grained materials. The advantages of this filter are: (1) Separation and two to three washing processes can be performed simultaneously on one filter.
( 2 ) 、 所用的洗水量较少， 每吨氢氧化铝用洗水量仅 0.5 ~ 0.75吨。  (2) The amount of washing water used is small, and the washing water per ton of aluminum hydroxide is only 0.5 to 0.75 tons.
( 3 ) 、 滤饼含水率低， 过滤氢氧化铝时， 滤饼含水率仅 8%左右。  (3) The moisture content of the filter cake is low. When the aluminum hydroxide is filtered, the moisture content of the filter cake is only about 8%.
试验表明， 广西高铁三水铝土矿的粗赤泥过滤性能类似砂状氢氧 化铝， 颗粒较粗、 透气性好， 其过滤性能非常好， 选择用平盘过滤机 或水平带式过滤机来处理， 利用了其过滤性能好的特点。 此过滤机用 的洗水量较少， 对工艺非常有利， 特别有利于拜尔循环系统的水平衡， 有利于提高精液浓度， 减轻蒸发工序的负担， 若用沉降槽洗涤， 其洗 水量达 2.0 ~ 4.0t/t -赤泥。 过滤后滤饼含水率较低， 有利于滤饼输送 和降低滤饼中附碱含量， 特别是对赤泥用于炼铁有好处， 因为海绵铁 厂要对赤泥进行干燥和脱钠处理， 粗赤泥含水少、 含碱低， 可降低铁 厂干燥工序的负担并省掉脱钠工序。  The test shows that the crude red mud filtration performance of Guangxi high-speed rail Sanshui bauxite mine is similar to that of sand-like aluminum hydroxide. The particles are coarse and have good gas permeability. The filtration performance is very good. Choose flat-plate filter or horizontal belt filter. The treatment utilizes the characteristics of good filtering performance. This filter uses less washing water, which is very beneficial to the process. It is especially beneficial to the water balance of the Bayer cycle system. It is beneficial to increase the concentration of semen and reduce the burden of the evaporation process. If washing with a settling tank, the washing volume will reach 2.0 ~ 4.0t/t - red mud. After filtration, the water content of the filter cake is low, which is beneficial to the transport of the filter cake and the reduction of the alkali content in the filter cake, especially for the red mud used for iron making, because the sponge iron plant needs to dry and de-salt the red mud. The coarse red mud has less water and low alkali content, which can reduce the burden on the iron plant drying process and save the sodium removal process.
尽管粗赤泥过滤性能较好， 但考虑到粗赤泥中会夹带少量细赤 泥， 在制定技术指标时应考虑到这部分细赤泥会造成技术指标下降， 使粗赤泥过滤制定的技术指标合理可行。  Although the filtration performance of coarse red mud is better, considering that a small amount of fine red mud will be entrained in the coarse red mud, it should be considered in the formulation of technical indicators that this part of the fine red mud will cause the technical indicators to drop, and the technology for filtering the coarse red mud. The indicators are reasonable and feasible.
本发明的有益效果是： 解决了高铁三水铝土矿的粗赤泥分离洗涤 的难题， 減少了洗水加入量， 提高了高铁三水铝土矿的综合开发效益。 具体实施方式： The invention has the beneficial effects that the problem of separating and washing the crude red mud of the high-iron trihydrate bauxite mine is solved, the amount of washing water is reduced, and the comprehensive development benefit of the high-iron trihydrate bauxite mine is improved. detailed description:
本发明的实施例： 从赤泥分级工序来的粗赤泥料浆， 进本工序的 水平带式过滤机进行过滤洗涤， 过滤机上的分配头将整台过滤机划分 为分离区、 洗涤区， 其中洗涤区又分为一洗区、 二洗区、 三洗区； 分 离区得到的溶液称为粗液， 送往脱硅工序； 分离区的滤饼进入洗涤区， 进行三次反向洗涤； 洗涤后的赤泥洗液送往溶出工序， 洗涤后的粗赤 泥用汽车送往海绵铁厂， 从赤泥中回收铁  Embodiments of the present invention: The coarse red mud slurry from the red mud classification process is filtered and washed into the horizontal belt filter of the present process, and the distribution head on the filter divides the whole filter into a separation zone and a washing zone. The washing zone is further divided into a washing zone, a second washing zone and a third washing zone; the solution obtained in the separation zone is called crude liquid, and is sent to the desiliconization process; the filter cake in the separation zone enters the washing zone, and three reverse washings are performed; washing After the red mud washing liquid is sent to the dissolution process, the washed coarse red mud is sent to the sponge iron factory by the car, and the iron is recovered from the red mud.
粗赤泥过滤洗涤工序主要技术指标为： 粗赤泥占赤泥总量的百分 比 58 ~ 63%， 过滤机进料固含 750 ~ 950g/l， 洗水加入量 0.8t/t -赤泥， 过滤机产能 200 - 300g/l, 滤饼含水率 20%， 过滤机上反向洗涤次数 3 次， 洗涤后滤饼附碱含量 0.2% , 洗水温度 90 ~ 951：。  The main technical indicators of the coarse red mud filtration washing process are: the percentage of crude red mud to the total red mud is 58 ~ 63%, the filter feed solid content is 750 ~ 950g / l, the washing water addition amount is 0.8t / t - red mud, The filter has a capacity of 200-300g/l, the filter cake has a moisture content of 20%, and the reverse washing time on the filter is 3 times. After washing, the filter cake has an alkali content of 0.2% and a washing water temperature of 90-951:.

Claims

权 利 要 求 Rights request
1. 一种粗赤泥过滤洗涤方法， 其特征是： 从赤泥分级工序来的 粗赤泥料浆， 进入水平带式过滤机或平盘过滤机进行过滤洗涤， 过滤 机上的分配头将整台过滤机划分为分离区、 洗涤区， 分离区得到的溶 液称为粗液， 送往脱硅工序； 分离区的滤饼进入洗涤区， 进行反向洗 涤； 洗涤后的赤泥洗液送往溶出工序， 洗涤后的粗赤泥送往海绵铁厂， 从赤泥中回收铁。 A coarse red mud filtration washing method, characterized in that: the crude red mud slurry from the red mud classification process is filtered into a horizontal belt filter or a flat plate filter, and the distribution head on the filter is finished. The filter is divided into a separation zone and a washing zone. The solution obtained in the separation zone is called crude liquid and sent to the desiliconization process; the filter cake in the separation zone enters the washing zone for reverse washing; the washed red mud washing liquid is sent to In the dissolution process, the washed crude red mud is sent to the sponge iron plant to recover iron from the red mud.
2. 根据权利要求 1所述的粗赤泥过滤洗涤方法， 其特征是： 粗赤 泥过滤洗涤工序主要技术指标为： 粗赤泥占赤泥总量的百分比 58 ~ 63% , 过滤机进料固含 650 ~ 1000g/l， 洗水加入量 0.5 ~ 1.0t/t -赤泥， 过滤机产能 200 - 300g/l, 滤饼含水率 15 - 25%， 过滤机上反向洗涤次 数 2 ~ 3次， 洗涤后滤饼附碱含量 0.2%， 洗水温度 90 ~ 95"C。  2. The coarse red mud filtration washing method according to claim 1, wherein: the main technical indexes of the coarse red mud filtration washing process are: the percentage of the coarse red mud to the total red mud is 58 to 63%, and the filter feeds. Solid content 650 ~ 1000g / l, washing water added 0.5 ~ 1.0t / t - red mud, filter capacity 200 - 300g / l, filter cake moisture content 15 - 25%, reverse washing on the filter 2 ~ 3 times After washing, the filter cake has a base content of 0.2% and a washing water temperature of 90 to 95"C.
PCT/CN2006/001741 2005-07-18 2006-07-18 Method for filtering and washing crude red mud WO2007009375A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110171810A (en) * 2019-04-08 2019-08-27 山东鲁北企业集团总公司 A kind of washing methods of ferric phosphate slurry
CN114349032A (en) * 2022-02-22 2022-04-15 淄博坤厚新材料科技有限公司 Aluminum oxide blank calcining process and equipment
CN116425183A (en) * 2023-04-07 2023-07-14 湖南省庭宇环保科技发展有限公司 Alumina production method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109692517A (en) * 2019-01-28 2019-04-30 云南文山铝业有限公司 Primary wash liquor recovery system and recovery method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108017A (en) * 1977-03-02 1978-09-20 Hitachi Zosen Corp Utilizing method for red mud waste in blast furnace
CN1098965A (en) * 1993-08-14 1995-02-22 赣州有色冶金研究所 A kind of method that from the bauxite stripping waste residue, reclaims iron mineral
WO2000029328A1 (en) * 1998-11-16 2000-05-25 Aluminium Pechiney Method for purifying sodium aluminate liquors containing sodium oxalate
CN1417124A (en) * 2001-11-10 2003-05-14 中国长城铝业公司 Red clay separating method for producing alumina by sintering process
US6827923B1 (en) * 1999-10-19 2004-12-07 Albemarle Corporation Process for the production of aluminum hydroxide of improved whiteness

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53108017A (en) * 1977-03-02 1978-09-20 Hitachi Zosen Corp Utilizing method for red mud waste in blast furnace
CN1098965A (en) * 1993-08-14 1995-02-22 赣州有色冶金研究所 A kind of method that from the bauxite stripping waste residue, reclaims iron mineral
WO2000029328A1 (en) * 1998-11-16 2000-05-25 Aluminium Pechiney Method for purifying sodium aluminate liquors containing sodium oxalate
US6827923B1 (en) * 1999-10-19 2004-12-07 Albemarle Corporation Process for the production of aluminum hydroxide of improved whiteness
CN1417124A (en) * 2001-11-10 2003-05-14 中国长城铝业公司 Red clay separating method for producing alumina by sintering process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110171810A (en) * 2019-04-08 2019-08-27 山东鲁北企业集团总公司 A kind of washing methods of ferric phosphate slurry
CN114349032A (en) * 2022-02-22 2022-04-15 淄博坤厚新材料科技有限公司 Aluminum oxide blank calcining process and equipment
CN114349032B (en) * 2022-02-22 2023-09-19 淄博坤厚新材料科技有限公司 Preparation method of alumina
CN116425183A (en) * 2023-04-07 2023-07-14 湖南省庭宇环保科技发展有限公司 Alumina production method

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