CN103272702A - Flotation collector and method for obtaining high-grade magnesite concentrate from low-grade magnesite - Google Patents
Flotation collector and method for obtaining high-grade magnesite concentrate from low-grade magnesite Download PDFInfo
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Abstract
本发明公开了一种用于从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂及方法，属菱镁矿浮选领域。包括：用作等可浮反浮选脱杂捕收剂的改性胺类BK-428，用作正浮选捕收剂的改性油酸。使用时按：原矿磨细、加入调整剂、反浮选捕收剂改性胺类BK-428，并搅拌，经过等可浮反浮选脱除矿石中的含硅和含钙杂质矿物，然后依次加入抑制剂、捕收剂改性油酸，并搅拌，经过正浮选获得含氧化镁>47%的菱镁石精矿。本发明捕收剂具有低耗、低毒、选择性好、捕收力强等优点。通过等可浮反浮选可脱除大部分含硅杂质和部分含钙杂质，克服了胺类捕收剂因水溶性不好而需用浓盐酸配制成溶于水的盐酸盐水溶液添加，省掉配制作业，添加方便，操作简单、使用安全稳定且精矿质量高。The invention discloses a flotation collector and a method for obtaining high-grade magnesite concentrate from low-grade magnesite, belonging to the field of magnesite flotation. Including: modified amine BK-428 used as a collector for equal floatation and reverse flotation, and modified oleic acid used as a collector for positive flotation. When using: grind the raw ore, add regulator, reverse flotation collector modified amine BK-428, and stir, and remove silicon-containing and calcium-containing impurity minerals in the ore through equal flotation and reverse flotation, and then Inhibitors, collectors and modified oleic acid are added in turn, and stirred, and the magnesite concentrate containing magnesium oxide>47% is obtained through positive flotation. The collector of the invention has the advantages of low consumption, low toxicity, good selectivity, strong collecting power and the like. Most of the silicon-containing impurities and some calcium-containing impurities can be removed through equal floatation and reverse flotation, which overcomes the need to use concentrated hydrochloric acid to prepare a water-soluble hydrochloride aqueous solution to add due to the poor water solubility of amine collectors. The preparation operation is omitted, the addition is convenient, the operation is simple, the use is safe and stable, and the concentrate quality is high.
Description
技术领域technical field
本发明涉及菱镁石浮选捕收剂，特别是涉及一种从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂及方法。The invention relates to a magnesite flotation collector, in particular to a flotation collector and a method for obtaining high-grade magnesite concentrate from low-grade magnesite.
背景技术Background technique
菱镁矿是我国的优势矿产资源，已探明储量居世界首位，其中MgO含量46%以下的中低品位菱镁矿资源占总储量60%以上。目前，MgO含量46%以上的高品位菱镁矿资源得到了大规模开发，使我国成为世界最大的菱镁矿产品生产国。80%以上的菱镁矿用于冶金、化工、玻璃等行业工业炉窑所需的耐火内衬。菱镁矿中主要有用矿物为菱镁石（MgCO3），脉石矿物则主要是石英、滑石、透闪石、绿泥石等硅酸盐矿物和白云石、方解石等含钙碳酸盐矿物。菱镁矿中的杂质SiO2在煅烧过程中会形成易熔性的硅酸盐，极大地减弱耐火材料的强度；CaO在煅烧过程中会形成CaSiO3，冷却时易松离而使耐火材料崩溃。因此，低品位菱镁矿由于矿石中的硅钙杂质含量高而不能直接使用，常常被当作废石堆积，不但造成了资源的浪费，而且形成的大量尾矿对环境造成严重影响。Magnesite is an advantageous mineral resource in my country, and its proven reserves rank first in the world, among which low- and medium-grade magnesite resources with MgO content below 46% account for more than 60% of the total reserves. At present, high-grade magnesite resources with an MgO content of more than 46% have been developed on a large scale, making my country the world's largest producer of magnesite products. More than 80% of magnesite is used in refractory linings for industrial furnaces in metallurgy, chemical industry, glass and other industries. The main useful mineral in magnesite is magnesite (MgCO 3 ), and the gangue minerals are mainly silicate minerals such as quartz, talc, tremolite, chlorite and calcium carbonate minerals such as dolomite and calcite. . The impurity SiO 2 in magnesite will form fusible silicate during the calcination process, which will greatly weaken the strength of the refractory material; CaO will form CaSiO 3 during the calcination process, which will easily loosen during cooling and cause the refractory material to collapse . Therefore, low-grade magnesite cannot be used directly due to the high content of silicon-calcium impurities in the ore, and is often piled up as waste rock, which not only causes a waste of resources, but also creates a large amount of tailings that have a serious impact on the environment.
目前，针对菱镁矿中的硅钙杂质一般采用浮选法进行降杂。对于石英及硅酸盐矿物等含硅脉石矿物，一般采用十二胺等阳离子型捕收剂反浮选脱除；而对方解石和白云石等含钙脉石矿物，一般采用六偏磷酸钠作抑制剂，以油酸或其钠盐作捕收剂正浮选获得菱镁石精矿。目前已有一些关于菱镁矿选矿的研究报道，但主要针对MgO含量46%以上、SiO2与MgO杂质含量均小于2%的较高品位矿石进行浮选除杂研究。对于MgO品位低、SiO2与CaO杂质含量高的低品位菱镁矿选矿研究较少，且难以获得高质量的菱镁石精矿。《轻金属》2007年第1期中论文“低品位菱镁矿选矿脱硅技术研究”介绍了以6P、GSN、GFN为调整剂，SBJ为捕收剂，采用正浮选流程处理MgO含量40.25%的菱镁矿（SiO2 11.77%，CaO0.25%），仅获得MgO品位45.49%的菱镁石精矿。但未公开调整剂和捕收剂成分；《矿业快报》2007年第12期中论文“巴盟隐晶质菱镁矿选矿试验研究”介绍了先用硫酸调节矿浆pH值到6.0，以六偏磷酸钠作抑制剂，十二胺作捕收剂脱硅；再用Na2CO3调节矿浆pH值到11.0，以水玻璃作抑制剂，YAK-1捕收菱镁石的反-正浮选流程处理MgO含量40.04%的菱镁矿（SiO2 10.79%，CaO 3.12%），获得MgO品位46.82%的菱镁石精矿。但未公开捕收剂YAK-1成分。《国外金属矿选矿》2007年第5期中论文“从微晶菱镁矿矿石中选择性浮选菱镁矿”介绍了在原矿磨矿到95%-0.250mm，并经三段分级和在脱去-0.020mm矿泥后，采用两段反浮选工艺处理MgO含量39.62%（SiO2 11.31%，CaO 6.44%）的菱镁矿矿石。在第一段，于自然pH值下（约7），用十二胺300g/t和煤油100g/t浮出硅酸盐矿物；在第二段，在pH值2.8～3.5下，用羧酸盐捕收剂600g/t浮出含钙碳酸盐矿物。经两段反浮选产出了MgO含量45.57%的菱镁石精矿，且精矿产率仅为38.55%。对于从品位低（MgO<44%），而硅钙杂质含量高（>2%）的低品位的菱镁矿中获得高品位(MgO>47%)菱镁石精矿的选矿分离方法目前国内外暂无报道。At present, the flotation method is generally used to reduce the silicon-calcium impurities in magnesite. For silicon-containing gangue minerals such as quartz and silicate minerals, cationic collectors such as dodecylamine are generally used for reverse flotation removal; for calcium-containing gangue minerals such as calcite and dolomite, sodium hexametaphosphate is generally used As an inhibitor, magnesite concentrate is obtained by positive flotation with oleic acid or its sodium salt as a collector. At present, there have been some research reports on magnesite beneficiation, but the flotation and impurity removal research is mainly carried out on higher-grade ores with MgO content above 46% and SiO 2 and MgO impurity content less than 2%. There are few studies on beneficiation of low-grade magnesite with low MgO grade and high SiO 2 and CaO impurity content, and it is difficult to obtain high-quality magnesite concentrate. "Light Metals" 2007 No. 1 paper "Research on Low-grade Magnesite Mineral Processing and Desiliconization Technology" introduces 6P, GSN, GFN as regulators, SBJ as collector, and adopts positive flotation process to treat MgO content of 40.25%. Magnesite (SiO 2 11.77%, CaO 0.25%), only 45.49% MgO grade magnesite concentrate was obtained. However, the composition of regulators and collectors has not been disclosed; the paper "Experimental Research on the Beneficiation of Bameng Cryptocrystalline Magnesite" in the 12th issue of "Mining Express" in 2007 introduced the use of sulfuric acid to adjust the pH value of the pulp to 6.0, and the use of hexametaphosphoric acid Sodium is used as an inhibitor, dodecylamine is used as a collector for desiliconization; then Na 2 CO 3 is used to adjust the pH value of the pulp to 11.0, water glass is used as an inhibitor, and YAK-1 is used to collect magnesite reverse-direct flotation process Magnesite with MgO content of 40.04% (SiO 2 10.79%, CaO 3.12%) was processed to obtain magnesite concentrate with MgO grade of 46.82%. But the composition of collector YAK-1 is not disclosed. The paper "Selective Flotation of Magnesite from Microcrystalline Magnesite Ore" in the 5th issue of "Foreign Metal Mineral Processing" in 2007 introduced that the raw ore is ground to 95%-0.250mm, and it is graded in three stages and detached. After removing -0.020mm slime, the magnesite ore with MgO content of 39.62% (SiO 2 11.31%, CaO 6.44%) was treated by two-stage reverse flotation process. In the first stage, at the natural pH value (about 7), use dodecylamine 300g/t and kerosene 100g/t to float the silicate minerals; in the second stage, at the pH value of 2.8 to 3.5, use carboxylic acid Salt collector 600g/t floats calcium carbonate minerals. After two stages of reverse flotation, a magnesite concentrate with an MgO content of 45.57% was produced, and the concentrate yield was only 38.55%. For the ore separation method of obtaining high-grade (MgO>47%) magnesite concentrate from low-grade magnesite with low grade (MgO<44%) and high silicon-calcium impurity content (>2%), the current domestic There are no reports outside.
上述现有技术的缺点是：The shortcoming of above-mentioned prior art is:
（1）主要针对MgO含量46%以上、SiO2与MgO杂质含量均小于2%的较高品位矿石进行浮选除杂研究，而对于MgO品位低、SiO2与CaO杂质含量高的低品位菱镁矿选矿研究较少，且不能获得高质量精矿；(1) Flotation and impurity removal research is mainly carried out for higher-grade ores with MgO content above 46% and impurity content of SiO 2 and MgO less than 2%. There are few studies on magnesium ore beneficiation, and high-quality concentrates cannot be obtained;
（2）含硅杂质矿物与含钙杂质矿物的浮选脱除是分步进行的。对于石英及硅酸盐矿物等含硅脉石矿物，采用十二胺等阳离子捕收剂反浮选脱除；而对白云石和方解石等含钙脉石矿物，则采用六偏磷酸钠抑制，再以油酸或其钠盐直接浮选获得菱镁石精矿，难以保证精矿质量；(2) The flotation removal of silicon-containing impurity minerals and calcium-containing impurity minerals is carried out step by step. For silicon-containing gangue minerals such as quartz and silicate minerals, cationic collectors such as dodecylamine are used for reverse flotation removal; for calcium-containing gangue minerals such as dolomite and calcite, sodium hexametaphosphate is used to suppress them, and then It is difficult to guarantee the quality of magnesite concentrate by direct flotation of oleic acid or its sodium salt;
（3）反浮选脱杂所用的十二胺等阳离子捕收剂水溶性不好，需要与浓盐酸配成溶于水的盐酸盐溶液使用，盐酸属强酸，具有腐蚀性毒性和很强的挥发性，氯化氢挥发后与空气中的水蒸气结合产生酸雾（盐酸小液滴）。酸雾和盐酸溶液都对人类组织有腐蚀性的效果，并有损害呼吸器官、眼睛、皮肤和肠道的可能。所以，使用盐酸时，应配合个人防护装备，比如橡胶手套或聚氯乙烯手套，护目镜，耐化学品的衣物和鞋子等，操作不方便；(3) Cationic collectors such as dodecylamine used in reverse flotation and impurity removal have poor water solubility and need to be used with concentrated hydrochloric acid to form a water-soluble hydrochloride solution. Hydrochloric acid is a strong acid with corrosive toxicity and strong Volatility, after hydrogen chloride volatilizes, it combines with water vapor in the air to produce acid mist (small droplets of hydrochloric acid). Both acid fumes and hydrochloric acid solutions have a corrosive effect on human tissue and have the potential to damage respiratory organs, eyes, skin and intestinal tract. Therefore, when using hydrochloric acid, personal protective equipment should be used, such as rubber gloves or polyvinyl chloride gloves, goggles, chemical-resistant clothing and shoes, etc., which are inconvenient to operate;
（4）十二胺选择性不好，浮选泡沫产品中互含较高，造成菱镁矿精矿质量不高，回收率过低，造成了资源的浪费，而且对环境也会造成影响。(4) The selectivity of dodecylamine is not good, and the flotation foam products have high mutual content, resulting in low quality of magnesite concentrate and low recovery rate, resulting in waste of resources and impact on the environment.
发明内容Contents of the invention
本发明要解决的技术问题是提供一种用于从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂及方法，可提高高品位菱镁石精矿的回收率及质量，解决目前低品位菱镁矿的浮选精矿质量不高、回收率低、造成资源浪费以及对环境造成影响的问题。The technical problem to be solved in the present invention is to provide a kind of flotation collector and method for obtaining high-grade magnesite concentrate from low-grade magnesite, which can improve the recovery rate of high-grade magnesite concentrate and Quality, to solve the problems of low quality flotation concentrate of low-grade magnesite, low recovery rate, waste of resources and impact on the environment.
解决上述技术问题的技术方案如下：The technical scheme that solves the above-mentioned technical problem is as follows:
本发明提供一种用于从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂，包括：用作等可浮反浮选脱杂捕收剂的改性胺类BK-428，用作正浮选捕收剂的改性油酸。The invention provides a flotation collector for obtaining high-grade magnesite concentrate from low-grade magnesite, including: a modified amine BK used as an equal-floatable reverse flotation impurity-removing collector -428, modified oleic acid used as positive flotation collector.
本发明还提供一种用于从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂的方法，包括：The present invention also provides a method for obtaining a flotation collector of high-grade magnesite concentrate from low-grade magnesite, comprising:
以氧化镁含量小于44%且硅钙杂质含量大于2%的低品位菱镁矿石为原矿，按下述步骤进行处理：Use low-grade magnesite ore with a magnesium oxide content of less than 44% and a silicon-calcium impurity content greater than 2% as raw ore, and process it according to the following steps:
原矿磨细、加入调整剂、改性胺类BK-428，并搅拌形成矿浆，经过等可浮反浮选脱杂去除矿浆中的含硅和含钙杂质矿物；Grind the raw ore, add regulator, modified amine BK-428, and stir to form a pulp, and remove impurity minerals containing silicon and calcium in the pulp through equal floatation and reverse flotation to remove impurities;
然后依次加入抑制剂、改性油酸，并搅拌，经过正浮选获得含氧化镁大于47%的菱镁石精矿。Then add inhibitor and modified oleic acid in sequence, and stir, and obtain magnesite concentrate containing more than 47% magnesium oxide through positive flotation.
本发明的有益效果为：该用于获得高品位菱镁石精矿的浮选捕收剂低毒、选择性好、捕收力强，能有效将石英、硅酸盐矿物等含硅矿物和白云石、方解石等含钙矿物浮选脱除，从低品位菱镁矿中获得高品位菱镁石精矿，最终可得到含氧化镁>47%的菱镁石精矿。该浮选捕收剂使用时方法简单，操作安全，无需配制即可直接添加使用，可以省掉捕收剂的配制作业。The beneficial effects of the present invention are: the flotation collector used to obtain high-grade magnesite concentrate has low toxicity, good selectivity and strong collection ability, and can effectively separate silicon-containing minerals such as quartz and silicate minerals from Dolomite, calcite and other calcium-containing minerals are removed by flotation, and high-grade magnesite concentrate can be obtained from low-grade magnesite, and finally magnesite concentrate containing >47% magnesium oxide can be obtained. The method of using the flotation collector is simple, the operation is safe, it can be directly added and used without preparation, and the preparation operation of the collector can be saved.
具体实施方式Detailed ways
下面对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的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，都属于本发明的保护范围。The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.
下面结合实例对本发明的方法作进一步的说明。Below in conjunction with example the method of the present invention is described further.
本发明实施例提供一种用于从低品位菱镁矿中获得高品位菱镁石精矿的浮选捕收剂，包括：用作等可浮反浮选脱杂捕收剂的改性胺类BK-428，用作正浮选捕收剂的改性油酸。An embodiment of the present invention provides a flotation collector for obtaining high-grade magnesite concentrate from low-grade magnesite, including: a modified amine used as a floatable reverse flotation impurity-removing collector Class BK-428, modified oleic acid used as positive flotation collector.
上述浮选捕收剂中，所述改性胺类BK-428的药剂成分为：十二烯基胺1～4质量份、椰油基丙撑二胺0.5～1.0质量份、烷基吗啉0.5～2.0质量份、十二碳醇1.0～3.0质量份。Among the above-mentioned flotation collectors, the pharmaceutical components of the modified amines BK-428 are: 1-4 parts by mass of dodecenylamine, 0.5-1.0 parts by mass of cocoylpropylenediamine, alkylmorpholine 0.5 to 2.0 parts by mass, 1.0 to 3.0 parts by mass of dodecyl alcohol.
上述浮选捕收剂中，所述改性油酸药剂成分为：油酸与煤油以3：1的重量比混合。In the above-mentioned flotation collector, the composition of the modified oleic acid agent is: oleic acid and kerosene are mixed in a weight ratio of 3:1.
本发明还提供一种用于从低品位菱镁矿中获得高品位菱镁石精矿的方法，是一种使用上述浮选捕收剂从低品位菱镁矿中获得高品位菱镁石精矿的方法，该方法包括以下步骤：The present invention also provides a method for obtaining high-grade magnesite concentrate from low-grade magnesite, which is a method for obtaining high-grade magnesite concentrate from low-grade magnesite by using the above-mentioned flotation collector. The method for mining, the method comprises the following steps:
以氧化镁含量小于44%且硅钙杂质含量大于2%的低品位菱镁矿石为原矿，按下述步骤进行处理：Use low-grade magnesite ore with a magnesium oxide content of less than 44% and a silicon-calcium impurity content greater than 2% as raw ore, and process it according to the following steps:
原矿磨细、加入水玻璃（调整剂）、改性胺类BK-428（药剂成分为：十二烯基胺1～4质量份、椰油基丙撑二胺0.5～1.0质量份、烷基吗啉0.5～2.0质量份、十二碳醇1.0～3.0质量份），并搅拌形成矿浆，经过等可浮反浮选脱杂去除矿浆中的含硅和含钙杂质矿物；Grind the raw ore, add water glass (regulator), modified amine BK-428 (medicine composition: 1-4 parts by mass of dodecenylamine, 0.5-1.0 parts by mass of cocoylpropylenediamine, alkyl 0.5-2.0 parts by mass of morpholine, 1.0-3.0 parts by mass of dodecyl alcohol), and stirred to form a pulp, and the impurity minerals containing silicon and calcium in the pulp are removed through equal floatation and reverse flotation.
然后依次加入水玻璃和六偏磷酸钠（两者作为抑制剂）、改性油酸（药剂成分为：油酸与煤油以3：1的重量比混合），并搅拌，经过正浮选获得含氧化镁大于47%的菱镁石精矿。Then add water glass, sodium hexametaphosphate (both as inhibitors), modified oleic acid (medicine composition: oleic acid mixed with kerosene at a weight ratio of 3:1), stir, and obtain Magnesite concentrate with more than 47% magnesium oxide.
上述方法中，在等可浮反浮选脱杂矿浆中加入的改性胺类BK-428的用量为300～400g/t-原矿；在正浮选矿浆中加入的改性油酸的量为600～700g/t-原矿。改性胺类BK-428和改性油酸均可直接或加温到30℃添加使用。作为调整剂的水玻璃用量为200～400g/t-原 矿；作为抑制剂中的水玻璃为100～200g/t-原矿，六偏磷酸钠用量为100～200g/t-原矿。In the above method, the amount of modified amine BK-428 added to the equal-floatable reverse flotation decontamination pulp is 300-400g/t- raw ore ; the amount of modified oleic acid added to the positive flotation pulp is 600～700g/t- raw ore . Modified amine BK-428 and modified oleic acid can be added directly or heated to 30°C. The amount of water glass used as a regulator is 200-400g/t- raw ore ; the amount of water glass used as an inhibitor is 100-200g/t- raw ore , and the amount of sodium hexametaphosphate is 100-200g/t- raw ore .
下面结合具体实施例对上述浮选捕收剂和使用浮选捕收剂从低品位菱镁矿中获得高品位菱镁石精矿的方法作进一步说明。The above-mentioned flotation collector and the method for obtaining high-grade magnesite concentrate from low-grade magnesite by using the flotation collector will be further described below in conjunction with specific examples.
实施例一Embodiment one
某低品位菱镁矿矿石，原矿含MgO 43.52%、SiO2 3.74%、CaO 2.69%。原矿磨矿后倒入浮选槽中，依次加入水玻璃400g/t-原矿、BK-428药剂（十二烯基胺4质量份、椰油基丙撑二胺0.8质量份、烷基吗啉2.0质量份、十二碳醇2.5质量份）400g/t-原矿，经过一粗一扫等可浮反浮选脱杂，然后依次加入水玻璃100g/t-原矿、六偏磷酸钠100g/t-原矿、改性油酸药剂（油酸与煤油以3：1的重量比混合）700g/t-原矿，经过一粗一精正浮选，可获得含氧化镁47.02%的菱镁石精矿。A low-grade magnesite ore contains MgO 43.52%, SiO 2 3.74%, and CaO 2.69%. After the raw ore is ground, it is poured into the flotation tank, and water glass 400g/t- raw ore , BK-428 agent (4 parts by mass of dodecenylamine, 0.8 part by mass of cocoylpropylenediamine, alkylmorpholine 2.0 parts by mass, 2.5 parts by mass of dodecyl alcohol) 400g/t- raw ore , after roughing and sweeping, etc., it can be floated and reversed to remove impurities, and then add water glass 100g/t- raw ore , sodium hexametaphosphate 100g/t -Raw ore , modified oleic acid agent (oleic acid and kerosene mixed at a weight ratio of 3:1) 700g/t- Raw ore , after a rough and a fine positive flotation, can obtain magnesite concentrate containing 47.02% magnesium oxide .
实施例二Embodiment two
某低品位菱镁矿矿石，原矿含MgO 42.30%、SiO2 8.11%、CaO 3.81%。原矿磨矿后倒入实验室浮选槽中，依次加入水玻璃200g/t-原矿、BK-428药剂（十二烯基胺1.7质量份、椰油基丙撑二胺0.5质量份、烷基吗啉0.8质量份、十二碳醇3.0质量份）350g/t-原矿，经过一粗一扫等可浮反浮选脱杂，然后依次加入水玻璃200g/t-原矿、六偏磷酸钠150g/t-原 矿、改性油酸药剂（油酸与煤油以3:1混合）650g/t-原矿，经过一粗一精正浮选，可获得含氧化镁47.45%的菱镁石精矿。A low-grade magnesite ore contains MgO 42.30%, SiO 2 8.11%, and CaO 3.81%. After the raw ore is ground, it is poured into the laboratory flotation tank, and water glass 200g/t- raw ore , BK-428 agent (1.7 parts by mass of dodecenylamine, 0.5 parts by mass of cocoyl propylene diamine, alkyl 0.8 parts by mass of morpholine, 3.0 parts by mass of dodecyl alcohol) 350g/t- raw ore , after roughing and sweeping, etc., it can be floated and reversed to remove impurities, and then add water glass 200g/t- raw ore , 150g of sodium hexametaphosphate /t- Raw ore , modified oleic acid agent (3:1 mixture of oleic acid and kerosene) 650g/t-Raw ore , after a rough and a fine positive flotation, a magnesite concentrate containing 47.45% of magnesium oxide can be obtained .
实施例三Embodiment three
某低品位菱镁矿矿石，原矿含MgO 41.45%、SiO2 2.34%、CaO 4.48%。原矿磨矿后倒入实验室浮选槽中，依次加入水玻璃300g/t-原矿、BK-428药剂（十二烯基胺3.5质量份、椰油基丙撑二胺0.5质量份、烷基吗啉1.5质量份、十二碳醇1.0质量份）300g/t-原矿，经过一粗一扫等可浮反浮选脱杂，然后依次加入水玻璃100g/t-原矿、六偏磷酸钠200g/t-原 矿、改性油酸药剂（油酸与煤油以3：1的重理比混合）600g/t-原矿，经过一粗一精正浮选，可获得含氧化镁47.50%的菱镁石精矿。A low-grade magnesite ore contains MgO 41.45%, SiO 2 2.34%, and CaO 4.48%. After the raw ore is ground, it is poured into a laboratory flotation tank, and water glass 300g/t- raw ore , BK-428 agent (3.5 parts by mass of dodecenylamine, 0.5 parts by mass of cocoyl propylene diamine, alkyl 1.5 parts by mass of morpholine, 1.0 parts by mass of dodecyl alcohol) 300g/t- raw ore , after roughing and sweeping, etc., it can be floated and reversed to remove impurities, and then add water glass 100g/t- raw ore , sodium hexametaphosphate 200g /t- raw ore , modified oleic acid agent (oleic acid and kerosene are mixed at a gravitational ratio of 3:1) 600g/t- raw ore , after rough and fine positive flotation, can obtain magnesia containing 47.50% diamond Magnesite concentrate.
本发明实施例浮选捕收剂，可在矿浆中直接添加，操作方便，且低毒、选择性高、强捕收性的选矿药剂BK-428和改性油酸，以等可浮反浮—正浮选工艺流程浮选脱杂获得高品位菱镁石精矿，不仅克服了胺类捕收剂因水溶性不好而需配制成稀酸水溶液添加，可以省掉捕收剂的配制作业，同时还具有操作简单、添加方便，使用安全、精矿质量高且稳定等特点。为从低品位菱镁矿中浮选获得高质量菱镁石精矿提供了一种操作稳定、使用方便、环境污染少的有效方法。The flotation collector of the embodiment of the present invention can be directly added to the pulp, easy to operate, and has low toxicity, high selectivity, and strong collection agent BK-428 and modified oleic acid. —Flotation removal of impurity in the positive flotation process to obtain high-grade magnesite concentrate, which not only overcomes the need to prepare dilute acid aqueous solution for addition of amine collectors due to poor water solubility, but also saves the preparation of collectors , At the same time, it also has the characteristics of simple operation, convenient addition, safe use, high quality and stable concentrate. It provides an effective method with stable operation, convenient use and less environmental pollution for obtaining high-quality magnesite concentrate from low-grade magnesite by flotation.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明披露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求书的保护范围为准。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
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