CN101805085A - A kind of treatment method of bauxite reverse flotation desliming wastewater - Google Patents
A kind of treatment method of bauxite reverse flotation desliming wastewater Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 36
- 238000005188 flotation Methods 0.000 title claims abstract description 36
- 239000002351 wastewater Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 125000002091 cationic group Chemical group 0.000 claims abstract description 14
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 12
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000010881 fly ash Substances 0.000 claims abstract description 11
- 238000005189 flocculation Methods 0.000 claims abstract description 4
- 230000016615 flocculation Effects 0.000 claims abstract description 4
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 3
- 238000004062 sedimentation Methods 0.000 claims abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 229910017604 nitric acid Inorganic materials 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 abstract description 17
- 239000007787 solid Substances 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000003513 alkali Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 28
- 229910000029 sodium carbonate Inorganic materials 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 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
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
一种铝土矿反浮选脱泥废水的处理方法，涉及一种用于铝土矿反浮选脱泥废水回收利用的方法。其特征在于其处理过程将铝土矿反浮选脱泥废水在搅拌下依次加入粉煤灰、加入无机酸调整pH值小于9、再加入聚合硫酸铝和/或阳离子型聚丙烯酰胺后，进行絮凝沉降，分离沉降的清水再利用。本发明的方法，针对铝土矿脱泥产生的废水，选择合适的工艺条件，加入粉煤灰，然后调整pH值，再加入聚合硫酸铝、阳离子型聚丙烯酰胺(分子量100万以上)，使废水中固体悬浮物迅速沉降，固液分离后清水返回脱泥或浮选作业。清水中还保留大量分散剂、碱，从而大幅降低了水耗和碱耗。The invention discloses a treatment method for bauxite reverse flotation desliming wastewater, and relates to a method for recycling and utilizing bauxite reverse flotation desliming wastewater. It is characterized in that in the treatment process, the bauxite reverse flotation desliming wastewater is sequentially added with fly ash under stirring, adding inorganic acid to adjust the pH value to be less than 9, and then adding polyaluminum sulfate and/or cationic polyacrylamide, and then proceeding Flocculation and sedimentation, separated and settled clear water for reuse. According to the method of the present invention, for the waste water produced by desliming of bauxite, suitable process conditions are selected, fly ash is added, and then the pH value is adjusted, and then polyaluminum sulfate and cationic polyacrylamide (molecular weight more than 1 million) are added, so that The suspended solids in the wastewater settle rapidly, and the clear water returns to the desliming or flotation operation after solid-liquid separation. A large amount of dispersants and alkalis are retained in the clear water, thus greatly reducing water consumption and alkali consumption.
Description
技术领域technical field
一种铝土矿反浮选脱泥废水的处理方法，涉及一种用于铝土矿反浮选脱泥废水回收利用的方法。The invention discloses a treatment method for bauxite reverse flotation desliming wastewater, and relates to a method for recycling and utilizing bauxite reverse flotation desliming wastewater.
背景技术Background technique
铝土矿中脉石矿物主要是高岭石、伊利石、叶腊石、绿泥石等粘土矿物，它们都属于层状硅酸盐，硬度小、在碎磨过程中极易泥化，而矿泥在浮选过程中会出现无选择性覆盖，极大恶化分选过程，甚至使得分选过程无法进行，尤其对于反浮选体系，因为其捕收剂为阳离子型，对矿泥更为敏感，于是脱泥成为反浮选工艺中不可回避的环节，目前较为成功适用于铝土矿反浮选的脱泥工艺有：1、控制分散-选择性脱泥方法(申请号200410046982.4)；2、选择性絮凝脱泥(ZL 200610137993.2)。但都存在耗水量过大，废水难以循环，废水中大量药剂包括碱、分散剂等对环境造成危害，与全世界范围推行的“循环经济”以及国家相关产业政策相悖。于是如何利用好脱泥废水成为铝土矿脱硅技术不可回避的环节。The gangue minerals in bauxite are mainly clay minerals such as kaolinite, illite, pyrophyllite, chlorite, etc. They all belong to layered silicates with low hardness and are easy to muddy during the crushing process, while the ore slime is There will be non-selective coverage in the flotation process, which will greatly deteriorate the separation process, and even make the separation process impossible, especially for the reverse flotation system, because its collector is cationic and more sensitive to slime, so Desliming has become an unavoidable link in the reverse flotation process. At present, the more successful desliming processes suitable for bauxite reverse flotation include: 1. Controlled dispersion-selective desliming method (application number 200410046982.4); 2. Selective desliming Flocculation and desliming (ZL 200610137993.2). But there is too much water consumption, the wastewater is difficult to recycle, and a large number of chemicals in the wastewater, including alkalis and dispersants, are harmful to the environment, which is contrary to the "circular economy" promoted worldwide and related national industrial policies. So how to make good use of desliming wastewater has become an unavoidable link in bauxite desiliconization technology.
选矿回水利用技术主要有以下几种：1、产品自然沉降，回水返回选矿厂加以利用；2、单独加入种种絮凝剂，以各种聚丙烯酰胺衍生物为主，选矿各产品中固体悬浮物迅速沉降后，清水返回利用。The utilization technology of mineral processing backwater mainly includes the following types: 1. The product naturally settles, and the return water is returned to the mineral processing plant for utilization; 2. Various flocculants are added separately, mainly various polyacrylamide derivatives, and the solids in each product of mineral processing are suspended After the material settles quickly, the clear water is returned for use.
以上两种处理方法存在以下弊端：1、自然沉降，固液分离效率偏低；2、单独加入有机絮凝剂后，对各种分选作业负面作用很大，尤其是脱泥和浮选作业。The above two treatment methods have the following disadvantages: 1. Natural settlement, low solid-liquid separation efficiency; 2. Adding organic flocculant alone has a great negative effect on various sorting operations, especially desliming and flotation operations.
发明内容Contents of the invention
本发明的目的就是针对上述已有技术存在的不足，提供一种能够大幅降低脱泥药耗，提高效利用回水，并且对相应脱泥、浮选作业负面影响很小的铝土矿反浮选脱泥废水的处理方法。The purpose of the present invention is to address the deficiencies in the above-mentioned prior art, and to provide a bauxite reverse flotation system that can greatly reduce the chemical consumption of desliming, improve the efficiency of using backwater, and have little negative impact on the corresponding desliming and flotation operations. Select the treatment method of desliming wastewater.
本发明的目的是通过以下技术方案实现的。The purpose of the present invention is achieved through the following technical solutions.
一种铝土矿反浮选脱泥废水的处理方法，其特征在于其处理过程将铝土矿反浮选脱泥废水在搅拌下依次加入粉煤灰、加入无机酸调整pH值小于9、再加入聚合硫酸铝和/或阳离子型聚丙烯酰胺后，进行絮凝沉降，分离沉降的清水再利用。A method for treating bauxite reverse flotation desliming wastewater, which is characterized in that during the treatment process, the bauxite reverse flotation desliming wastewater is sequentially added with fly ash under stirring, adding inorganic acid to adjust the pH value to less than 9, and then After adding polyaluminum sulfate and/or cationic polyacrylamide, flocculation and sedimentation are carried out, and the settled clear water is separated for reuse.
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的粉煤灰加入量为0.5～9Kg/m3。A method for treating bauxite reverse flotation desliming wastewater according to the present invention is characterized in that the amount of fly ash added is 0.5-9Kg/m 3 .
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的加入调整矿浆pH值小于9的步骤加入的是硫酸、硝酸或盐酸。A method for treating bauxite reverse flotation desliming wastewater of the present invention is characterized in that sulfuric acid, nitric acid or hydrochloric acid is added in the step of adding to adjust the pH value of the pulp to be less than 9.
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的聚合硫酸铝加入量为5～20g/m3。A method for treating bauxite reverse flotation desliming wastewater according to the present invention is characterized in that the amount of polyaluminum sulfate added is 5-20 g/m 3 .
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的阳离子型聚丙烯酰胺加入量为0.5～2.0g/m3。A method for treating bauxite reverse flotation desliming wastewater according to the present invention is characterized in that the addition amount of the cationic polyacrylamide is 0.5-2.0 g/m 3 .
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的阳离子型聚丙烯酰胺的分子量为100万以上。A method for treating bauxite reverse flotation desliming wastewater of the present invention is characterized in that the molecular weight of the cationic polyacrylamide is more than 1 million.
本发明的一种铝土矿反浮选脱泥废水的处理方法，其特征在于所述的分离沉降的清水再利用是用于铝土矿脱泥或浮选作业过程。A method for treating bauxite reverse flotation desliming wastewater according to the present invention is characterized in that the reuse of the separated and settled clear water is used in bauxite desliming or flotation operations.
本发明的方法，针对铝土矿脱泥产生的废水，选择合适的工艺条件，加入粉煤灰，然后调整pH值，再加入聚合硫酸铝、阳离子型聚丙烯酰胺(分子量100万以上)，使废水中固体悬浮物迅速沉降，固液分离后清水返回脱泥或浮选作业。清水中还保留大量分散剂、碱，从而大幅降低了水耗和碱耗。According to the method of the present invention, for the waste water produced by desliming of bauxite, suitable process conditions are selected, fly ash is added, and then the pH value is adjusted, and then polyaluminum sulfate and cationic polyacrylamide (molecular weight more than 1 million) are added, so that The suspended solids in the wastewater settle rapidly, and the clear water returns to the desliming or flotation operation after solid-liquid separation. A large amount of dispersants and alkalis are retained in the clear water, thus greatly reducing water consumption and alkali consumption.
具体实施方式Detailed ways
一种铝土矿反浮选脱泥废水的处理方法，铝土矿反浮选过程可以采用按照公开专利ZL200610137993.2对铝土矿进行脱泥，脱泥得到的废水中先后加入粉煤灰0.5～9Kg/m3，调整均匀；加入硫酸、硝酸或盐酸，调整矿浆pH值小于9；加入聚合硫酸铝5～20g/m3，调整均匀；加入阳离子型聚丙烯酰胺(分子量100万以上)0.5～2.0g/m3，调整均匀；固液分离，清水返回脱泥或者浮选作业，对分选效果影响很小。A method for treating bauxite reverse flotation desliming wastewater. The bauxite reverse flotation process can be used to deslim the bauxite according to the published patent ZL200610137993.2, and add 0.5% fly ash to the deslimed wastewater. ～9Kg/m 3 , adjust evenly; add sulfuric acid, nitric acid or hydrochloric acid, adjust the pH value of the slurry to less than 9; add polyaluminum sulfate 5～20g/m 3 , adjust evenly; add cationic polyacrylamide (more than 1 million molecular weight) 0.5 ~2.0g/m 3 , evenly adjusted; solid-liquid separation, clear water returning to desliming or flotation operations, has little effect on the separation effect.
实施例1Example 1
试验选择铝土矿原矿。脱泥方法按照专利ZL 200610137993.2陈述方法进行脱泥，磨矿细度为-0.074mm占80％，其中第一次脱泥用碳酸钠调整pH值，用量6Kg/t原矿，分散剂200g/t原矿，絮凝剂30g/t原矿；第二次脱泥仍用碳酸钠调整pH值，用量4Kg/t原矿，分散剂100g/t原矿，絮凝剂10g/t原矿；两次脱泥得到的废水合并，加入粉煤灰9Kg/m3，搅拌3分钟后，用硫酸调整pH值到9.0，加入聚合硫酸铝10g/m3，搅拌均匀后再加入阳离子型聚丙烯酰胺(分子量1200万)2.0g/m3，搅拌均匀，药剂充分作用后，静置，然后固液分离，清水中固体悬浮物含量为0.8g/m3，清水返回脱泥作业；回水脱泥试验仍然是磨矿细度为-0.074mm占80％，第一次脱泥省去分散剂，补充添加碳酸钠1.4Kg/m3，絮凝剂用量为70g/t原矿；第二次仍然省去分散剂，补充添加碳酸钠1.0Kg/m3，絮凝剂用量为20g/t原矿。清水及回水试验结果见表1。The test selects raw bauxite ore. The desliming method is deslimed according to the method stated in the patent ZL 200610137993.2. The grinding fineness is -0.074mm, accounting for 80%. The first desliming uses sodium carbonate to adjust the pH value. The dosage is 6Kg/t raw ore, and the dispersant is 200g/t raw ore , flocculant 30g/t raw ore; the second desliming still uses sodium carbonate to adjust the pH value, the dosage is 4Kg/t raw ore, dispersant 100g/t raw ore, flocculant 10g/t raw ore; the waste water obtained from the two desliming is combined, Add fly ash 9Kg/m 3 , stir for 3 minutes, adjust the pH value to 9.0 with sulfuric acid, add polyaluminum sulfate 10g/m 3 , stir well, then add cationic polyacrylamide (molecular weight: 12 million) 2.0g/m 3. Stir evenly. After the agent has fully acted, let it stand still, and then separate the solid and liquid. The content of suspended solids in the clean water is 0.8g/m 3 , and return the clean water to the desliming operation; 0.074mm accounted for 80%, dispersant was omitted for the first desliming, 1.4Kg/m 3 of sodium carbonate was supplemented, and the amount of flocculant was 70g/t raw ore; dispersant was still omitted for the second time, and 1.0Kg of sodium carbonate was supplemented /m 3 , the amount of flocculant is 20g/t raw ore. The results of the clean water and backwater tests are shown in Table 1.
由此可以看出，通过使用回水，脱泥用药剂中碳酸钠及分散剂用量都大幅降低，只是絮凝剂略有增加。回水全部得到利用。而分选指标几乎不改变。It can be seen from this that by using backwater, the amount of sodium carbonate and dispersant in the desliming agent is greatly reduced, but the flocculant is slightly increased. All return water is utilized. And the sorting index hardly changed.
表1：原矿1回水利用试验结果Table 1: Test results of raw ore 1 return water utilization
备注：A/S为铝硅比，亦即产品中Al2O3与SiO2的重量百分比，无单位，下同Remarks: A/S is the ratio of aluminum to silicon, that is, the weight percentage of Al 2 O 3 and SiO 2 in the product, no unit, the same below
实施例2Example 2
试验选择铝土矿原矿。脱泥方法按照专利ZL 200610137993.2陈述方法进行脱泥，磨矿细度为-0.074mm占60％，其中第一次脱泥用碳酸钠调整pH值，用量8.0Kg/t原矿，分散剂350g/t原矿，絮凝剂45g/t原矿；第二次脱泥仍用碳酸钠调整pH值，用量4.0Kg/t原矿，分散剂150g/t原矿，絮凝剂15g/t原矿；两次脱泥得到的废水合并，加入粉煤灰9Kg/m3，搅拌3分钟后，用硝酸调整pH值到9.0，加入聚合硫酸铝20g/m3，搅拌均匀后再加入阳离子型聚丙烯酰胺(分子量500万)0.5g/m3，搅拌均匀，药剂充分作用后，静置，然后固液分离，清水中固体悬浮物含量为1.0g/m3，清水返回脱泥作业；回水脱泥试验仍然是磨矿细度为-0.074mm占60％，第一次脱泥省去分散剂，补充添加碳酸钠1.5Kg/m3，絮凝剂用量为45g/t原矿；第二次仍然省去分散剂，补充添加碳酸钠0.9Kg/m3，絮凝剂用量为15g/t原矿。清水及回水试验结果见表2。The test selects raw bauxite ore. The desliming method is deslimed according to the method stated in the patent ZL 200610137993.2. The grinding fineness is -0.074mm, accounting for 60%. The first desliming uses sodium carbonate to adjust the pH value. The dosage is 8.0Kg/t raw ore, and the dispersant is 350g/t Raw ore, flocculant 45g/t raw ore; the second desliming still uses sodium carbonate to adjust the pH value, the dosage is 4.0Kg/t raw ore, dispersant 150g/t raw ore, flocculant 15g/t raw ore; waste water obtained from two desliming Combine, add fly ash 9Kg/m 3 , stir for 3 minutes, adjust the pH value to 9.0 with nitric acid, add polyaluminum sulfate 20g/m 3 , stir evenly, and then add 0.5g of cationic polyacrylamide (molecular weight: 5 million) /m 3 , stir evenly, after the agent has fully acted, let it stand still, and then separate the solid and liquid, the content of suspended solids in the clean water is 1.0g/m 3 , return the clean water to the desliming operation; the backwater desliming test is still the grinding fineness -0.074mm accounted for 60%. For the first desliming, the dispersant was omitted, and 1.5Kg/m 3 of sodium carbonate was supplemented, and the flocculant dosage was 45g/t raw ore; the dispersant was still omitted for the second time, and sodium carbonate was supplemented 0.9Kg/m 3 , the amount of flocculant is 15g/t raw ore. The results of the clear water and backwater tests are shown in Table 2.
由此可以看出，通过使用回水，脱泥用药剂中碳酸钠及分散剂用量都大幅降低，只是絮凝剂略有增加。回水全部得到利用。而分选指标几乎不改变。It can be seen from this that by using backwater, the amount of sodium carbonate and dispersant in the desliming agent is greatly reduced, but the flocculant is slightly increased. All return water is utilized. And the sorting index hardly changed.
表2：原矿2回水利用试验结果Table 2: Test results of raw ore 2 backwater utilization
实施例3Example 3
试验选择铝土矿原矿。脱泥方法按照专利ZL 200610137993.2陈述方法进行脱泥，磨矿细度为-0.074mm占75％，其中第一次脱泥用碳酸钠调整pH值，用量7.0Kg/t原矿，分散剂240g/t原矿，絮凝剂40g/t原矿；第二次脱泥仍用碳酸钠调整pH值，用量4.0Kg/t原矿，分散剂100g/t原矿，絮凝剂15g/t原矿；两次脱泥得到的废水合并，加入粉煤灰4Kg/m3，搅拌3分钟后，用盐酸调整pH值到9.0，加入聚合硫酸铝5.0g/m3，搅拌均匀后再加入阳离子型聚丙烯酰胺(分子量800万)1.0g/m3，搅拌均匀，药剂充分作用后，静置，然后固液分离，清水中固体悬浮物含量为0.6g/m3，清水返回脱泥作业；回水脱泥试验仍然是磨矿细度为-0.074mm占75％，第一次脱泥省去分散剂，补充添加碳酸钠1.9Kg/m3，絮凝剂用量为80g/t原矿；第二次仍然省去分散剂，补充添加碳酸钠1.0Kg/m3，絮凝剂用量为20g/t原矿。清水及回水试验结果见表3。The test selects raw bauxite ore. The desliming method is deslimed according to the method stated in the patent ZL 200610137993.2. The grinding fineness is -0.074mm, accounting for 75%. The first desliming uses sodium carbonate to adjust the pH value. The dosage is 7.0Kg/t raw ore, and the dispersant is 240g/t Raw ore, flocculant 40g/t raw ore; the second desliming still uses sodium carbonate to adjust the pH value, the dosage is 4.0Kg/t raw ore, dispersant 100g/t raw ore, flocculant 15g/t raw ore; waste water obtained from two desliming Combine, add fly ash 4Kg/m 3 , stir for 3 minutes, adjust the pH value to 9.0 with hydrochloric acid, add polyaluminum sulfate 5.0g/m 3 , stir well, then add cationic polyacrylamide (molecular weight 8 million) 1.0 g /m 3 , stir evenly, after the agent has fully acted, let it stand still, and then separate the solid and liquid. The thickness is -0.074mm, accounting for 75%. The first desliming omits the dispersant, and adds 1.9Kg/m 3 of sodium carbonate, and the amount of flocculant is 80g/t raw ore; Sodium 1.0Kg/m 3 , flocculant dosage is 20g/t raw ore. The results of the clear water and backwater tests are shown in Table 3.
由此可以看出，通过使用回水，脱泥用药剂中碳酸钠及分散剂用量都大幅降低，只是絮凝剂略有增加。回水全部得到利用。而分选指标几乎不改变。It can be seen from this that by using backwater, the amount of sodium carbonate and dispersant in the desliming agent is greatly reduced, but the flocculant is slightly increased. All return water is utilized. And the sorting index hardly changed.
表3：原矿3回水利用试验结果Table 3: Test results of raw ore 3 backwater utilization
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| CN102397820A (en) * | 2011-11-18 | 2012-04-04 | 中国铝业股份有限公司 | Method for utilizing bauxite dust |
| CN103316760A (en) * | 2013-06-09 | 2013-09-25 | 云南文山铝业有限公司 | Method for processing monohydrallite ore washing gangue |
| CN105016525A (en) * | 2015-07-09 | 2015-11-04 | 北京矿冶研究总院 | Copper-molybdenum ore beneficiation wastewater treatment method |
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| CN102276035A (en) * | 2011-07-20 | 2011-12-14 | 安徽省通源环境节能有限公司 | Processing method for garbage leachate and processing apparatus thereof |
| CN102397820A (en) * | 2011-11-18 | 2012-04-04 | 中国铝业股份有限公司 | Method for utilizing bauxite dust |
| CN103316760A (en) * | 2013-06-09 | 2013-09-25 | 云南文山铝业有限公司 | Method for processing monohydrallite ore washing gangue |
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