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Ore beneficiation equipment, sand making equipment, crushing equipment and powder grinding equipment, which are widely used in various industries such as metallurgy, mine, chemistry, building material, coal, refractory and ceramics.
The addition of a new optional gearcase on the machine will see cutting power increase by 50%, according to the company, with a spokesperson confirming the newest addition to the continuous miner will be transported to a customer later this month for a trial period.
The 12HM46 continuous miner is ideal for industrial mineral mining applications, including trona, gypsum, potash, and salt, according to Komatsu. It has a 1,600 mm cutter head diameter, making it the largest and most powerful drum-style continuous miner in the companys product line-up.
In the ReeMAP project, of which the aim is to develop technology for recycling mine waste, LKAB also plans to produce input materials, including hydrogen, and to electrify processes and, thereby, virtually eliminate carbon dioxide emissions in mine-waste recycling.
Ibrahim Baylan, Swedens Minister for Business, Industry and Innovation, comments: LKAB continues to develop Swedens strengths as an innovative nation. ReeMAP is an important initiative to utilise todays mine waste, leading to increased circularity and contributing to the green transition with both phosphorus and rare earth elements.
ReeMAP will apply fossil-free processes for recycling mine waste (tailings) from LKABs iron ore production and upgrade it to phosphorus products and rare earth elements; products which, owing to import dependency and their economic importance, are classed by the EU as critical raw materials. In addition, gypsum and fluorine products will also be produced at the industrial park, through the hydro chemical processes.
The planned recycling of mine waste will entail a circular business model and improve resource utilisation, since all valuable minerals will be extracted, according to LKAB. Residual mine waste will continue to be landfilled.
Thanks to electrification, the process will be almost entirely free of carbon dioxide emissions, the company said. Certain minor emissions may arise, due to the release of chemically-bound carbon in apatite (bound in remnants of calcite mineralisation).
Production of mineral fertiliser will result in a reduction of 700,000 t of carbon dioxide emissions (corresponding to 1% of Swedens emissions in 2019), as compared with the alternative of increasing production of mineral fertiliser using conventional technology, it said.
The industrial park will be a centre for chemical engineering where innovative technology is used to recover valuable resources, he said. Here, we will set a global standard for clean products, energy efficiency and emissions.
LKAB said: In agriculture, high crop yields are made possible by the addition of plant nutrients in the form of phosphate fertiliser. As much as half of all agricultural production is dependent on fertilisers. The purity of the product is also important. For example, the phosphate fertiliser LKAB plans to produce will be free of cadmium, a hazardous substance which is contained in some of the material imported into the EU. Rare earth elements are used in many high-tech products, for example, permanent magnets for electric vehicles and wind turbines.
We will need up to 50 ha to accommodate our facilities, Hkansson said. A railway line and port access are also important, since we plan to ship as much as a million tonnes of product a year. Production, especially hydrogen production, will be energy intensive. We are now looking at all of these requirements and conditions for possible localisation in Lule, Skellefte and Helsingborg.
Jan Mostrm, President and CEO for LKAB, explains the importance of ReeMAP for LKABs strategy and future: We have an ambition to be one of the most innovative, resource-efficient and responsible mining companies in the world. Through our development projects SUM, HYBRIT and now ReeMAP, we have assumed a global leadership role for industrial transformation and to provide the world with tomorrows resources.
The European Union is tomorrow launching the European Raw Materials Alliance with LKAB as a partner. The aim is to increase the unions degree of self-sufficiency in critical raw materials. Initially, the alliance will focus on rare earth elements.
While Talbot has more than three decades of experience in delivering industrial water management solutions across the African continent, what is not generally realised is the fact the companys expertise extends beyond the ambit of water itself, the South Africa sustainable water and wastewater specialist says.
Dealing with sludges and waste streams, typically with high suspended loads, is often required to provide a total water management solution and is viewed as being both a complex and expensive process, Talbot said, explaining this neednt be the case.
Talbot Consulting Services General Manager, Claire Lipsett, says the leading Highveld coal producer in question called on the company to provide a solution for the removal of gypsum generated as a by-product of its coal mine water purification process.
Lipsett explains the waste stream flowing out of the treatment process into a downstream holding dam contained a high content of gypsum, to the extent it significantly reduced the facilitys finite storage capacity.
Following an on-site examination of the processes involved, Talbot proposed a simple and well-known technology that would provide an effective solution and could be proven on site during live operations through pilot testing.
In this case, a hydraulic filter press was selected to dewater the solids, dry and press them into briquette form for transportation to end-use customers. The filtrate minus the extracted solids was directed to the evaporation dam before returning to site processes via a blend line, Talbot said.
The effectiveness of the solution was proven during a two-week trial in March, which achieved impressive results, according to Lipsett. We reduced the waste solids from around 2,900 mg/l to just 84 mg/l, she said. We also demonstrated that the technology would extract gypsum at a rate of 100 kg/h on a full-scale site operation.
The trial, Lipsett says, showed that effective solids removal could be achieved in a single-step process, without the use of flocculants or coagulants. It also offered the client an easy-to-operate, appropriate solution to achieve total water management for the site.
Pilot trials conducted by Talbot, such as this, generate several benefits that enable clients to not only fully understand the short-term implications of investing in a new technology but how they will positively impact on the future operation of a business, according to Lipsett.
Before making any form of commitment, the client has the opportunity to engage with the technology and equipment in terms of look and feel, its effectiveness and ease of operation, all the while receiving technical and commercial guidance from a supplier that is a leader in its class and is committed to providing long-term support, not just a one-off sale, she said.
Financial projections from Talbot of conceptual models prepared during the piloting process include not only the original capital cost of the equipment but anticipated expenditure on items like membrane replacement, operational and maintenance costs.
The company said: This provides potential users with a comprehensive set of economic life-cycle projections, thus enabling them to make informed decisions on the short-, medium- and long-term benefits and implications with no hidden extras.
Lipsett cites the results obtained in a similar process employed by a South Africa platinum producer where the recovery of precious metals from a wastewater stream was achieved using the same technology and significantly exceeded initial design expectations. Pilot trials had a substantial impact on the business case and ultimately enabled the client to invest in the solution, according to the company.
While this may be an extreme case, there are many instances in which the materials recovered have significant intrinsic value so that solids recovery projects not only pay for themselves but deliver sustainable economic value into the future, the company said.
Gypsum is a mineral found in crystal as well as masses called gypsum rock. It is a very soft mineral and it can form very pretty, and sometimes extremely large colored crystals. Massive gypsum rock forms within layers of sedimentary rock, typically found in thick beds or layers. It forms in lagoons where ocean waters high in calcium and sulfate content can slowly evaporate and be regularly replenished with new sources of water. The result is the accumulation of large beds of sedimentary gypsum. Gypsum is commonly associated with rock salt and sulfur deposits. It is processed and used as prefabricated wallboard or as industrial or building plaster, used in cement manufacture, agriculture and other uses.
Most of the worlds gypsum is produced by surface-mining operations. In the United States, gypsum is mined in about 19 states. The states producing the most gypsum are Oklahoma, Iowa, Nevada, Texas, and California. Together, these states account for about two-thirds of the United States annual production of gypsum. Over 30 million tons of gypsum is consumed in the United States annually. Canada, Mexico and Spain are other significant producers of raw gypsum. In all, more than 90 countries produce gypsum. In most open pit gypsum operations, benches are drilled and blasted using ammonium nitrate as the explosive. Because gypsum is so soft, most drills can drill through it at a rate of roughly 23 ft per minute. Sometimes the drill holes become wet, which can cause problems with the ammonium nitrate. In these cases the ammonium nitrate is bagged in plastic bags before being lowered into the blast hole. Mines use approximately 1 kg of explosives for each ton of gypsum they blast.
The most significant use for gypsum is for wallboard and plaster products. All modern homes in North America and other developed countries use a great deal of wallboard for interior walls. The United States is the worlds leading consumer of wallboard at over 30 billion square feet per year. Some gypsum is used to make Portland cement, and some is used in agricultural applications. A small amount of very pure gypsum is used in glass making and other specialized industrial applications.
Gypsum processing equipment differs significantly in scale and level of technology. some plants produce one or two tonnes per day using low-cost manual technologies, some other plants of a thousand tonnes per day that are highly mechanized and capable of producing different types and grades of gypsum plaster or plaster boards.
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