Technological study on the flotation process of Manganese Ore

This study demonstrated the importance of appropriate flotation conditions and reagent dosage for the separation of standard manganese concentrates from low-grade manganese ores. The research object used Unagad manganese ore located in Dornogovi province. The main mineral of manganese ores was pyrolusite (MnO2). According to the chemical element analyses, the content of manganese in the primary ore was Mn-17.31%. XRD analyses revealed minerals such as quartz, pyrolusite, albite, anorthite, anorthoclase, orthoclase, and hausmannite. This study conducted the beneficiation of manganese ore by the froth flotation method. Manganese ore beneficiation tests were performed for the flotation method under the following conditions: the collector dosage with 900 g/t, 1100 g/t, 1300 g/t, 1500 g/t, and 1700 g/t, the dosage of the depressant as 570 g/t, 670 g/t, 770 g/t, and 870 g/t, and the frother with 900 g/t, pH value 8, the grade of -0.074 mm was 60%, 70%, 80%, 90% respectively. Beneficiation tests performed in the optimum conditions resulted in concentrate with Mn = 32.37%, the recovery was 57.33%, and the yield was 30%. As a result of the flotation enrichment of manganese ore, а concentrate containing 32.37% manganese was obtained. Манганы хүдрийг флотацийн аргаар баяжуулах технологийн судалгаа Хураангуй: Энэхүү судалгаагаар бага агуулгатай манганы хүдрээс стандартын шаардлага хангасан манганы баяжмалыг гарган авахад флотацийн зохистой горим, урвалжийн зарцуулалт хэрхэн нөлөөлж байгааг тогтоов. Судалгааны объектоор Дорноговь аймгийн нутагт орших Унагадын манганы ордын хүдрийг ашигласан бөгөөд хүдрийн голлох эрдэс нь пиролюзит юм. Элементүүдийн химийн шинжилгээгээр анхдагч хүдэр дэх манганы агуулга 17.31% байна. Рентген дифрактометрийн шинжилгээгээр кварц, пиролюзит, альбит, анортит, анортоклаз, ортоклаз, гаусманит зэрэг эрдсүүд байгаа нь тогтоогдсон. Манганы хүдрийг флотацийн аргаар баяжуулах цуврал туршилтуудыг цуглуулагчийн зарцуулалт 900 г/т, 1100 г/т, 1300 г/т, 1500 г/т, 1700 г/т, дарагчийн зарцуулалт 570 г/т, 670 г/т, 770 г/т, 870 г/т, хөөсрүүлэгч 900 г/т, рН-8, ширхэглэлийн хэмжээг -0.074 мм ангийн агуулга 60%, 70%, 80%, 90% гэсэн нөхцлүүдэд явуулсан. Туршилтын дүнд цуглуулагчийн хэмжээ 1500 г/т, хөөсрүүлэгч 900 г/т, дарагч 670 г/т, -0.074 мм ангийн агуулга 70%, рН-ийн утга 8 гэсэн хамгийн тохиромжит нөхцөлд баяжмал дахь металл авалт 57.33%, гарц 30% байж, харин Mn-ний агуулга 32.37%-тай баяжмал гарав. Түлхүүр үг: Манганы баяжмал, флотаци, олейны хүчил, натрийн силикат

Manganese ores of the Kemerovo region – Kuzbass and methods of their enrichment

Manganese ores of the vast majority of domestic deposits are of low quality: with low content of manganese (18 – 24 %) and high specific content of phosphorus (ratio P/Mn > 0.006). They have an increased content of iron and silicon and they are difficult to enrich. The main part of balance reserves of manganese ores – 98.5 million tons (64.2 %) is concentrated in large Usinskoye field in the Kemerovo region. In addition to Usinskoye, there are also deposits in this region Kaigadatskoye (32.7 million tons), Durnovskoye (300 thousand tons), Selezenskoye fields and the Chumay plot. For a comprehensive approach to solving the proposed problem it is needed to assess technical and economic feasibility of all stages (exploration, extraction and enrichment of manganese ores, their subsequent processing and consumption) of involvement of manganese ores from these deposits in production. Using developed technology of calcium-chloride enrichment, high-quality manganese concentrates are obtained from carbonate, including high-phosphorous ores of the Usinskoye field, poor oxide and ferromanganese ores of the Selezenskoye and the Durnovskoye fields. Extraction of manganese from manganese-containing raw materials into concentrate was at least 90 %. The resulting concentrate contains 58 – 64 % of manganese, less than 0.01 % of phosphorus, 0.02 – 0.05 % of iron oxide, 0.5 – 1.0 % of silica and sulfur. Thermodynamic calculations and experimental studies on the enrichment of polymetallic manganese-containing ores from the Chumay plot allowed us to determine the main technological parameters for extracting valuable components. The use of optimal technological parameters of enrichment allows extraction of up to 95 – 97 % of manganese and 98 – 99 % of nickel from raw materials.

Preparation and Usage of High Quality Manganese-Containing Materials from Ferroalloy Production Waste

We propose a flow diagram for processing ferroalloy production waste, such as silicothermic slag from manganese metal, as well as wet and dry powder of cleaning gas from ferroalloy furnaces that smelt manganese alloys. We experimentally determined the parameters for intensifying the calcium chloride method of enriching ferroalloy production waste, which resulted in a manganese extraction rate of 78-86%, with high-quality manganese concentrates. We present the results of studies related to the use of high-quality concentrates to dope steel with manganese, when processing it in a bucket, and smelting manganese metal via the aluminothermic method.

Mechanical grinding of components of silicone manganese charge to improve the reproducibility

The present state of smelting of ferrosilicon manganese due to the deterioration of the quality of manganese concentrates is characterized by low extraction of manganese, silicon and an increase in the slag multiplicity. This requires the improvement of smelting technology with the use of charge materials with high reactivity, which is ensured by their preliminary preparation for melting.One method of preparation may be the method of mechanical activation of components separately or joint activation to provide high rates of the degree of recovery of elements in the metal phase.In order to attract mechanically activated fine materials for smelting of si-licomanganese, the basic technological requirements of preliminary preparation of briquetting briquette are grounded. Using hydrolysis lignin as a binder provides strong briquettes. At pressing pressures of 450-550 kg/cm2, the strength of the raw braces is 65-68 kg/cm2, and the fired in a reducing atmosphere at temperatures up to 1000оС, the strength reaches 160-185 kg/cm2.The study of the kinetics of joint carbon-thermal reduction of manganese and silicon at temperatures of 1250-1600 ° C with continuous weight loss control of the charge batch shows that the degree of recovery of the fractured, mechanically activated charge is 1.5 - 1.8 times higher than the reproducibility of the charge component 3- 0 mm and 2-3 times higher than the degree of recovery of the factory charge.Based on the results of chemical analysis of the experimental metal samples, it is shown that the application of mechanical activation in the joint processing of the mixture is significantly higher characteristics of extraction of manganese in the alloy by reducing the pre-formation of the slag phase and the recovery in this case of manganese from the slag melt

Solid phase reaction between components of the charge in the areas burning solid fuel and features of formation liquid phase

Objective. The influence of solid-phase reactions in the agglomerated charge layer on the quality of manganese ag-glomerate is considered. Research methodology. Thermodynamic analysis was used to establish the predominance of reactions. The phase (mineral) composition of manganese concentrates and the experimental agglomerate was investigated by X-ray diffraction method on a DRON-2 diffractometer in monochromatic Cuα radiation. The interplanar distances at the corresponding values of the X-ray reflection intensity from the investigated samples of concentrates and agglomerate were determined by comparing the obtained data with the corresponding tabular data given in the reference books on X-ray diffraction analysis of substances. Sintering of the experimental agglomerate was performed on a laboratory agglomeration bowl. Research results. It is established that the dissociation of higher manganese oxides begins at relatively low temperatures and proceeds in stages to the formation of MnO. Since the chemical affinity of manganese for oxygen is significant, reduction to metallic Mn was not observed, as this requires a high content of reducing agent and a reducing atmosphere, which is difficult to achieve in real agglomeration processes. Dissociation of rhodochrosite carbonate concentrate and gradual dissociation of dolomitized limestone leads to an increase in CO2 content in the atmosphere. Slag bonds are represented by compounds Mn2SiO4, MnO • Al2O3, Mg2SiO4, CaO • MgO • SiO2, 2CaO • SiO2. Thermodynamic calculations show that at moderate temperatures, compounds such as calcium ferrites are not formed, which is likely for the interaction between basic flux oxides and manganese oxides. Scientific novelty. Studies have shown that CaO does not completely convert to a slag bond, and even with a basicity of order 1, there is undigested lime. White spots are formed in the structure of the finished agglomerate. Such an agglomerate during transportation and storage loses strength and a large amount of trifles is formed..

Distribution and Economic Potential of Manganese Deposits in Nigeria: A Review

The Northern basement complex of Nigeria contains a large number of manganese deposits. So far, ten deposits of manganese have been reported by previous workers. These deposits occur within Precambrian metasediments (schist belt), mafic and ultramafic rocks which are Proterozoic in age and folded into synclinorial belts within the crystalline basement complex. Considering their widespread distribution in space, time and tectonic setting, some are considered to be of ensilalic mode of evolution while others are ensimatic. However, the mineralizations are mostly of poor grade, and thus require beneficiation processing. The local steel industries within the country have continued to depend on manganese ore. No satisfactory substitute for manganese in steel production has been identified as at present. The applications of manganese deposits by geologists, chemical and environmental engineers, ceramicists, soil scientists and microbiologists shows a bright future for manganese ore in Nigeria. The ever increasing demand for steel products has continued to put pressure on Federal Government of Nigeria to complete the construction work at the nation’s steel producing plant which, will result in the need for a manganese concentrates for economic growth and development.