CN105478218A - 细赤泥分离加工方法 - Google Patents

细赤泥分离加工方法 Download PDF

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CN105478218A
CN105478218A CN201510812565.4A CN201510812565A CN105478218A CN 105478218 A CN105478218 A CN 105478218A CN 201510812565 A CN201510812565 A CN 201510812565A CN 105478218 A CN105478218 A CN 105478218A
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CN105478218B (zh
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王海超
阿列尼科夫·弗拉基米尔
伊万诺夫斯克·亚历山大
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Yantai New And Old Kinetic Energy Conversion Research Institute And Yantai Demonstration Base For Transfer And Transformation Of Scientific And Technological Achievements
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/029—High gradient magnetic separators with circulating matrix or matrix elements
    • B03C1/03—High gradient magnetic separators with circulating matrix or matrix elements rotating, e.g. of the carousel type
    • 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
    • B03C1/025—High gradient magnetic separators
    • B03C1/031—Component parts; Auxiliary operations
    • B03C1/033—Component parts; Auxiliary operations characterised by the magnetic circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
    • B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
    • 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
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    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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Abstract

本发明公开了一种细赤泥分离加工方法，赤泥在粉碎机中进行碾碎的同时，通过磁场分离出磁性产物和非磁性产物，即分离出细赤泥中的金属氧化物和硅化合物，粉碎机通过配备的旋转电磁场分离出磁性产物和非磁性产物，旋转电磁场的旋转频率为110到130赫兹，磁场强度为100到160A/M，之后再对硅化合物进行脱水，并通过磁力分选机继续将干渣分离成磁性和非磁性产品。在提高赤泥加工效率的同时，简化了赤泥分离方法，并提高了氧化铁产量。

Description

细赤泥分离加工方法
技术领域
本发明属于铝工业废弃物加工方法的一种，具体来说，是一种从细散赤泥分离出金属氧化物和硅化合物的加工方法，按照该方法将赤泥分离成各种有用成分：氧化铁、氧化钛、氧化硅。
背景技术
赤泥——全球制铝工业中最广泛的铝土冶铝方法的产物，该方法也称为“拜耳法”。按照该技术要求，应打碎铝土矿石，在浓缩的碱溶液中进行细磨。为了将氧化铝完全转化到溶液中，应在浸出过程中加入少量的石灰。从溶液中制备出铝酸盐矿浆和赤泥。然后，通过沉降法从溶液中分离出赤泥，并转移保存。赤泥的主要部分由非常小的颗粒(大小为1-10微米或更小)构成，这些颗粒的沉淀过程非常缓慢。
赤泥具有强碱性反应，其确切的化学构成取决于生产过程中所使用的铝土和操作工艺技术。残渣红色部分的主要成分——氧化铁，赤泥主体构成物——氧化铁(40-45％)，未加工的氧化铝残渣(10-15％)，二氧化硅(10-15％)，石灰(6-10％)，无定形二氧化钛(4-5％)，二氧化钠(5-6％)。
按照细散赤泥加工为金属氧化物和硅化合物的方法，赤泥经过细磨后，通过磁场分离为磁性和非磁性产品。请参见俄罗斯联邦2014年发布的№2528918专利说明书。
该方法的不足之处在于含铁化合物的含量不够高，同时，赤泥中铁化合物被包含在硅化合物内部，而硅化合物很难清除。正如上述的专利说明中描述的那样，铁精矿产量——35％，铁的提炼比率——54.7％。这些指标还有提高的空间。该方法的另一个缺点在于其工艺过程的复杂性。事实上，本发明是一个复杂的、多步骤的加工处理过程。
发明内容
本发明旨在提供一种将细赤泥分离加工处理为金属氧化物和硅化合物的方法，确保提高赤泥加工效率的同时简化方法步骤，当前技术亟需解决的任务也就是提高氧化铁产量。
为此，本发明所采用的技术方案为：一种细赤泥分离加工方法，赤泥在粉碎机中进行碾碎的同时，通过磁场分离出磁性产物和非磁性产物，即分离出细赤泥中的金属氧化物和硅化合物，其特征在于：粉碎机通过配备的旋转电磁场分离出磁性产物和非磁性产物，旋转电磁场的旋转频率为110到130赫兹，磁场强度为100到160A/M，之后再对硅化合物进行脱水，并通过磁力分选机继续将干渣分离成磁性和非磁性产品。
作为上述方案的优选，所述粉碎机为若干偶数个串联而成，每个粉碎机均配备有旋转电磁场，相邻粉碎机的旋转电磁场方向相反。通过多步骤的过程，为提高加工赤泥中有用产品含量提供了可能性。
进一步，最后再将干渣馈送至水力旋流器装置，以分离聚硅酸。提供了从赤泥中继续分离聚硅酸的可能性，聚硅酸是一种有用成分——生产液态玻璃的原料。
此外，碾碎赤泥并分离为各种成分之前，应加热至120-180℃。提高了氧化铁含量的百分比，进一步提高赤泥加工效率的可能性。
本发明的有益效果：粉碎机安装旋转电磁场，旋转频率为110至130赫兹，磁场强度为100至160A/M，提供了利用旋转电磁场从赤泥中分离出氧化铁和硅化合物的可能性。通过旋转电磁场将氧化铁转带走，这些氧化铁呈研磨体。由于赤泥颗粒间存在大量的接触相连状态，赤泥颗粒应研磨至细碎，氧化铁和硅化合物的氧化物就可以分离开来。根据实验结果，旋转电磁场的频率范围为110至130赫兹，磁场强度参数范围为100至160A/M，符合最佳范围的要求，可以确保赤泥分离成氧化铁和硅化合物达到最好的结果。
具体实施方式
细散赤泥加工为金属氧化物和硅化合物的处理过程按如下步骤进行，本实施例提供一个不限制本发明应用的细散赤泥加工为金属氧化物和硅化合物的方法。
第一阶段：铝工业废料(细散赤泥)从喂料斗转移到传送带上，在传送带上加热到120-180℃，最优温度至150℃。
第2阶段：之后将废料转移至粉碎机，粉碎机配备有旋转电磁场，粉碎机内的旋转电磁场开始旋转，比如按顺时针方向旋转。
此时，开始对废料进行下列程序的加工：
——磁致伸缩；
——电磁干扰；
——超声波干扰；
——机械干扰磁场。
鉴于在铝工业废弃物中含有45％以上的氧化铁，在旋转电磁场中氧化铁颗粒将作为氧化硅中废弃物，特别是偏硅酸物质中的颗粒进行提炼。通过旋转电磁场分离出磁性产物和非磁性产物，即分离出细赤泥中的金属氧化物和硅化合物。可以由一台配备了旋转电磁场的粉碎机完成碾碎和分离；也可以是由若干偶数个串联而成的粉碎机协同完成，每个粉碎机均配备有旋转电磁场，相邻粉碎机的旋转电磁场方向相反，则进入下面的第3阶段。
第3阶段：经过第一粉碎机的分离后，废弃物立即被转移到第二粉碎机中，第二粉碎机的旋转电磁场将逆向旋转(即逆时针方向)。随着颗粒间的研磨程度急剧增高，废弃物细散颗粒完全从硅氧化物斑块中脱离出来，特别是偏硅酸颗粒。
第4阶段：硅氧化物特别是偏硅酸颗粒中形成的水蒸气，覆盖在废弃物表面，排放到冷凝器中，从而完成对硅化合物的脱水。
第5阶段：粉碎的废弃物转移至磁力分选机，继续将干渣分离成磁性和非磁性产品，以分离出有用成分。
第6阶段：干燥的残余物转移至水力旋流器单元，以分离聚硅酸。
本说明中的细散赤泥加工为金属氧化物和硅化合物的方法，是在传统工艺以及具有不引起其他技术问题的可能性的基础上实现的。
在MASHGEO物化科研生产有限责任公司的实验室条件下，对提出的方法进行检验。取材来自匈牙利Neszmely(涅茨梅里)村第8号库房的赤泥，该赤泥中含有：
-Fe2O3-46.4％；
-AL2O3-10.2％；
-SiO2-16.5％；
-TiO2-7.2％。
含有的精矿：
-Fe2O3-74.2％；
-AL2O3-3.5％；
-SiO2-4.1％；
-TiO2-14.3％
由此可以确定，该方法实现了技术目标，即简化了方法步骤以提高赤泥加工效率，同时提高了氧化铁产量。
该发明进一步的技术成果在于，以该方法加工细散赤泥，可以保证：
——提高二氧化钛产量；
——提高其他稀有金属的产量；
——获得热量，以用于部分填补己方需求；
——获得建筑材料和公路建设原料。

Claims (4)

1.一种细赤泥分离加工方法，赤泥在粉碎机中进行碾碎的同时，通过磁场分离出磁性产物和非磁性产物，即分离出细赤泥中的金属氧化物和硅化合物，其特征在于：粉碎机通过配备的旋转电磁场分离出磁性产物和非磁性产物，旋转电磁场的旋转频率为110到130赫兹，磁场强度为100到160A/M，之后再对硅化合物进行脱水，并通过磁力分选机继续将干渣分离成磁性和非磁性产品。
2.根据权利要求1所述的细赤泥分离加工方法，其特征在于：所述粉碎机为若干偶数个串联而成，每个粉碎机均配备有旋转电磁场，相邻粉碎机的旋转电磁场方向相反。
3.根据权利要求1或2所述的细赤泥分离加工方法，其特征在于：最后再将干渣馈送至水力旋流器装置，以分离聚硅酸。
4.根据权利要求1所述的细赤泥分离加工方法，其特征在于：碾碎赤泥并分离为各种成分之前，应加热至120-180℃。
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