Use of tailings in mn dissolution from marine nodule matrix

The nodules are spherical bodies that are scattered within the sedimentary zone of the seabed, and their growth is closely associated with the biogeochemical processes and water sediments. These nodules are mainly composed of Mn, Fe, SiO2, Ca, Ni, Cu, Co and Al. Manganese nodules are an excellent source of base metals and sought-after and rare elements and the fact that they are used as a base elements matrix will be in high demand in industry. Previous studies have shown that primary con-centrations of chemical such as Fe in the system are beneficial for increas-ing manganese extraction. However, it is necessary to optimize the opera-tional parameters so as to maximise Mn recovery. This work investigates the effect of using of tailings, obtained after slag flotation ata foundry plant on the dissolution of Mn from marine nodules, where statistical analysis was distributed using factorial experimental design ontime, MnO2/Fe2O3 ratio, and H2SO4 concentration.

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.

Removal of Phosphorus from High-Phosphorus Manganese Ores by Ammonia-Ammonium Carbonate Leaching Method

High-phosphorus manganese ores provide an important source of manganese, which is regarded as an irreplaceable material in the steel industry. The ammonia-ammonium carbonate leaching method was proposed for the removal of phosphorus and extracting manganese from high-phosphorus manganese ore, both effectively and environmentally. To explore the dissolution behavior of phosphorus and manganese in the ammonia-ammonium carbonate solution, the effect of the ammonia-to-ammonium carbonate concentration ratio, the leaching temperature, and the liquid-to-solid ratio on manganese extraction and dephosphorization rate were investigated. In addition, the composition of precipitated manganiferous sample, which was obtained from high-phosphorus manganese ores by ammonia-ammonium carbonate leaching process, was also studied. The results indicated that more than 99.2% phosphorus was removed and more than 83.5% of manganese was extracted by ammonia-ammonium carbonate leaching under the following conditions: ammonia to ammonium carbonate concentrations: 14:2 mol/L; liquid/solid ratio: 5:1 mL/g; leaching temperature: 25 °C; The precipitated manganiferous sample has little impurities, Mn% is 44.12%, P% is 0.02%, P/Mn = 0.00045.

Elaboration technology of selective processing of acid mine waters of copper-pyrites complex mining plants

The actuality of elaboration technology of processing of acid mining waters of copper-pyrite deposits is stipulated by necessity to increase nature resources utilization efficiency. Implementation of it will allow to decrease the dead-weight losses of manganese, copper, iron and other metals. The developed technology includes a complex of sequentially executed processes. At the first stage extraction of Cu2+ ions by cementation is done, at the second stage extraction of Fe2+ and Fe3+ ions in the dispersed phase is done by acid-base deposition. At the third stage extraction of Mn2+ ions is done by transferring Mn2+ ions under the action of an oxidizing agent in insoluble forms of manganese and the subsequent extraction of the dispersed phase by the electro flotation method. The developed technology was tested on the acidic underspoil waters of the mining enterprises in the Ural region. The obtained practical results of the developed technology implementation have shown that, the technology introduction will make it possible to obtain copper, iron and manganese in the form of commercial products with a simultaneous decrease in their concentrations in adjacent water bodies to the maximum residue limit (MRL) standards. The developed technological recommendations for the manganese extraction from acid mine waters allow selective extracting manganese in the form of a flotation concentrate, with a manganese content of up to 50.1%. The resulting manganese concentrate can be used as feedstock in various metallurgical operations. The technology is simple, it can be used without applying complex expensive equipment both independently and within a system of existing treatment facilities.