shaking table nigeria

flsmidth shaking tables upgrading gold concentrates

Within the gravity concentration circuit, upgrading of concentrates is critical to the success of your project. Our shaking tables are used in the final stages of gravity concentration achieving not only maximum metals recovery, but also the highest grade concentrates possible.

Our MT3500 Mineral Table and ATS3500 Automated Table System are gravity separation machines designed with quality, safety, and performance in mind. They are utilised to separate dense material, such as gold, platinum, and other precious metals, from less dense gangue materials. They are complete package units provided with all necessary process and control equipment to upgrade the Knelson concentrate.

The MT3500 is provided with a variable frequency drive that provides additional flexibility in setting up the ideal operation mode for each application. Separation is achieved by a combination of strike-oscillations directed down the length of the table and a perpendicular crossflow of dressing water that carries lighter materials to the edges of the table.

The ATS3500 Automated Table System is provided with a vibrating screen which receives and screens the concentrate feed continuously. The screen undersize is discharged by gravity into an agitated tank and elevated by a screw conveyor in a controlled manner to the concentrating tables feed tank. The tabled material undergoes a magnetic separation while being concentrated. The final table concentrate is then discharged into a secure lockbox while the middling are re-circulated to the agitated tank to be processed again.

At FLSmidth, the performance, safety, and quality of our products is paramount. These standards are reflected in our shaking tables, built to last, to be safe, and to provide you with the best recovery possible.

Our shaking table systems have the largest available surface area for concentrate capture on the market. This means out of all the shaking tables available, youll get the greatest yield from using ours.

With their flat profile design, an optional overhead magnetic separator can be used with our shaking tables for the removal of magnetics such as ball mill filings and other ferrous material. Due to this flat design, a minimised offset between the tabling surface and the magnetic separator occurs, improving the recovery of magnetic materials.

We offer a variant of the tabling system that is automated, meaning that it continues to process concentrate without operator interference. The machine comes with an MCC/control panel that provides control for all system motors, as well as a PLC based automated control for the systems base functions, which can be changed to best fit the needs of the particular feed its processing.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

shaking table, shaker separator table for sale,low costs-china hxjq mining machinery

Shaking table, also known as shaker separator table, is a kind of gravity separation beneficiation equipment for sorting fine-grained materials and is widely used for the separation of tin ore, tungsten ore, gold ore, lead ore, zinc ore, antimony, bismuth, titanium , etc.

Due to its competitive price and reliable performance, shaking table has been exported to over 90 countries, such as Zimbabwe, Kenya, Tanzania, South Africa, Nigeria, Pakistan, Nepal, Singapore, etc.

We are responsible for every part, every procedure and every machine. Both single equipment and full ore beneficiation plant are made to provide high quality & highly efficient product for you, guaranteeing the production efficiency.

Please feel free to fill in the following form or email us ([email protected]) to get product information,price,service and other supports.We will reply to you within 24 hours as soon as possible.Thank You!

up-grading of agbado-okudu iron ore using magnetic separation and shaking table techniques

Download this complete Project material titled; Up-Grading Of Agbado-Okudu Iron Ore Using Magnetic Separation And Shaking Table Techniques with abstract, chapters 1-5, references, and questionnaire.Preview Abstract or chapter one below

The beneficiation of the Agbado Okudu iron ore deposit located in Kogi State, Nigeria was investigated. The investigation involved determining the chemical composition and mineralogical characteristics of the run-of-mine. Followed by determination of the work index of the ore and then separation tests using shaking table, magnetic technique and a combination of the two techniques. The results of the tests carried out revealed that the Agbadu okudu iron ore contained on the average a total iron content (38.82% FeT), 49.10% (Si02) and other element. Thin sections of the ore sample examined under polarized light revealed that the iron bearing minerals are predominantly magnetite and hematite with a combined average percentage distribution of 69% and the mineral in abundant after the iron bearing minerals is quartz. The grindability test reveals that the Agbado Okudu iron ore has and average work index of about 4.32 kwh/tonne. The results of gravity separation shows that a concentrate with a maximum grade of 55.81% (FeT), and a recovery of 66.40% at particle size fraction -56 + 45m could be produced. While magnetic separation alone produced a concentrate with an optimum grade of 57.43% (FeT), and a recovery of 82.12% at particle size fraction of 80+63m. However, combination of gravity separation technique (shaking table) followed by magnetic separation technique could only produce a concentrate with an optimum grade of 57.17% (FeT), and a recovery of 80.85% at a particle size fraction of 63+53m. Hence, based on the results obtained from the concentration tests, the Agbado Okudu iron ore deposit can be best beneficiated using magnetic technique to produce a concentrate that can serve as feed for pig iron production by conventional blast furnace route.

PAGE DECLARATION- iii CERTIFICATION- iv DEDICATION- v ACKNOWLEDGEMENT- vi ABSTRACT- vii TABLE OF CONTENTS viii LIST OF TABLES- xi LIST OF FIGURES xiii CHAPTER ONE Introduction- 1 CHAPTER TWO 2.0 Literature Review- 4 2.1 Nigeria Iron Ore Deposits- 4 2.1.1 Agbado-Okudu Iron Ore- 5 2.1.2 Mineralogy of Agbado-okudu Iron Ore- 6 2.2 Study of some Nigerian Iron Ores Characteristics- 7 2.2.1 Iron Ore Beneficiation Process- 9 2.2.2 Gravity concentration process- 9 2.2.3 Magnetic separation- 11 ix 2.2.4 Froth flotation- 13 2.3 Methods for the Beneficiation of Iron Ore- 13 2.3.1 Beneficiation route for the Itakpe Iron Ores- 14 2.4 Procedures for development of conceptual flow sheet for a newly discovered ore- 17 2.5 Particles Size Analysis 19 2.6 Size/Assay Analysis 20 2.7 Determination of liberation size of the valuable Minerals in the Ore 20 2.8 Work index Determination 23 2.8.1 Standard bond method- 23 CHAPTER THREE 3.0 Materials and methods- 26 3.1 Samples collection and equipment used- 26 3.2 Methods- 26 3.2.1 Preparation of the bulk sample for chemical analysis- -26 3.2.2 Chemical analysis- 26 3.2.3 Microscopy- 27 3.2.4 Size/Assay analysis- 28 3.2.5 Work index Determination- 29 3.2.6 Separation test using shaking table technique- 29 3.2.7 Separation test using Magnetic Separator- 30 x 3.2.8 Shaking table separation followed by Magnetic Separation techniques 31 CHAPTER FOUR 4.0 Results and Discussions- 32 4.1 Results 32 4.2 Discussions 32 4.2.1 Chemical analysis- 32 4.2.2 Mineralogical analysis- 33 4.2.3 Size/Assay Analysis of the Head Sample 34 4.2.4 Work index Determination- 35 4.2.5 Concentration test using Shaking Table 36 4.2.6 Magnetic separation technique- 40 4.2.7 Results of concentration test using shaking table followed by magnetic Separation Techniques 43 CHAPTER FIVE 5.0 Conclusions and Recommendations 46 5.1 Conclusions- 46 5.2 Recommendations- 46 References- 58

NTRODUCTION Iron is one of the most common elements on earth. Nearly every structure put on by man contains at least a little iron. It is also one of the oldest metals and was first fashioned into useful and ornamental objects about 3,500 years ago (Lambert and Mark, 1988). One of the most important determining factors for establishing Iron and steel plants is the availability of iron ore deposit with good geological, mineralogical and metallurgical properties. There is an estimated 2,707 million tonnes of iron ore deposit in the country out of which 200 million tones are in the proven reserve (Umunnakwe, 1988). Iron ore is simply the largest single raw material input in iron and steel making process and the country is endowed with abundant reserves of it but with varying characteristics. The deposits abound in different parts of the country as shown in Table 2.1. Most of the iron ores discovered in the country are however, low grade (their iron content in the crude ranges between 28-45% FeT). This meant that for them to be used in iron and steel production they have to undergo substantial beneficiation and upgrading. (Also and Yakubu, 1995). The Itakpe iron ore had been the most intensively studied and exploited deposit with a proven reserve of 200million tones with an average iron content of 36% FeT. This is presently being up-graded to obtain a 2 concentrate of 64% FeT for use at Ajaokuta and Aladja steel plants. Apart from the Itakpe iron ore deposit there are other deposit which reserves are estimated at over 2.3 billon tonnes as shown in (Table 2.1) within 150km radius of the Ajaokuta steel plant. To ensure security of supply of the iron ore for the nation Steel industries, further research and development need to be carried out on these new founded deposits to enable their full exploitation. With these reserves, conservative estimates indicate that the nation could be self-sufficient in iron ore for a period ranging between 100- 150 years (Umunnakwe1988). The role of iron and steel in the national economy is enormous. One cannot name an economic branch where iron and steel find no application and to some extend the economic power of a country is determined by its consumption and output of steel products. It is on this basis, that the Federal Government of Nigeria in 1971 launched the country into a new era of iron and steel technology by the establishment of the Delta and Ajaokuta steel projects. Though, the establishment of these projects was laudable inadequate attention was given to the development of local raw materials to feed the plants thus, making the plants on commissioning to import iron ore concentrate form countries like Brazil, Liberia and Guinea. Recently there has been renewed interests on the souring of locally available raw materials to feed these plants because the Itakpe iron ore project and the total iron ore requirement of Ajaokuta at 1.3 million tonnes of steel per 3 annum is about 2.135 million tones of iron concentrate and at this rate the Itakpe iron ore project is conservatively estimated to last for about 25 years, (Also and Yakubu, 1995). Also, the Itakpe iron ore plant commissioned on the 80s to deliver iron concentrate to Ajaokuta and later closed and now concessioned to Indians. Would not be able to meet the demand of Ajaokuta Steel plant when it finally takes off fully. It is therefore, important that these types of studies be conducted so as to increase the source of Iron Ore for Ajaokuta plant. And through such studies the technology for the beneficiation of various Nigerian iron ore deposits for onward supply to Ajaokuta and Delta steel plants will be developed. Since the goal of every beneficiation process, mineral-processing operation in particular, is to effectively separate the valuable material from the gangue with minimum loss to the tailings; the need to develop and employ a sustainable, effective and relatively economical method of separation is imperative. The concentration of the valuable minerals from the gangue involves exploitation of the differences in physical, chemical and electrical properties of the ore after effective comminution Akande et al (2000). This work, therefore, is aimed at developing a process route for the beneficiation of the Agbado- Okudu iron ore deposit located close to Jakura village in Kabba, Kogi State for its possible utilization in Ajaokuta and Delta Steel Plants.

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shaking table | gravity separator - mineral processing

Shaking tables are one of the oldest gravity separators in the mineral processing industry, capable of handling minerals and coal of 0-2mm.Shaking tables are rectangular-shaped tables with riffled decks across which a film of water flows. The mechanical drive imparts motion along the long axis of the table, perpendicular to the flow of the water. The water carries the particles of the feed in slurry across the riffles in a fluid film. This causes the fine, high density particles to fall into beds behind the riffles as the coarse, low-density particles are carried in the quickly-moving film. The action of the table is such that particles move with the bed towards the discharge end until the end of the table stroke, at which point the table rapidly moves backwards and the particles momentum propels them still forward.

The capacity of the shaking table is about 0.5 t/h. 1.5-2TPH depending on the particle size of the process. In chromite processing and dressing industry, it is usually dozens of shaking table series or parallel installation to deal with excess tons. Therefore, the required installation space, equipment control difficulties due to the increased number of installations and the need for more automated processes have brought new challenges to the process design.

1. Big channel frame, very strong steel base structure( other companies use small channel frame)2. Polypropylene materials feeding chute and collection chute.(other companies dont have )3. Heighten steel stand,making it more convenient when feeding materials.4. Add cover for belt wheel5. Use top quality fiberglass deck,more wear-resisting6. Has various grooves on the table for your choice. We will recommend the best grooves to you according to your gold size.

shaking table test and numerical simulation on ultra-large diameter shield tunnel passing through soft-hard stratum - sciencedirect

Shaking table test on ultra-large diameter tunnel passing through soft-hard stratum.A modified similitude-ratio design method is proposed, with the soil-structure relative stiffness as the main control factor.The comparison between test and numerical results shows a good agreement.The tunnel seismic response around the soft-hard interface is investigated.

In this study, the seismic behavior of a shield tunnel with an ultra-large diameter of 15m passing through a soft-hard stratum was investigated, using a series of 1/30 scaled shaking table model tests and numerical simulations. A modified similitude-ratio design method was proposed, with the soilstructure relative stiffness as the main control factor. The model tunnel was made of a plexiglass tube. The soft soil was modeled with silty clay, whereas the hard soil was modeled with fine and angular gravel. The tests were also simulated using the finite element modeling (FEM) software ABAQUS, and equivalent linearization was employed for the soil nonlinearity in the frequency domain. The results show that the modified similitude-ratio design method is workable and effective. Moreover, it may provide additional possibilities regarding the selection of structural model materials, and broaden the applicability of a shaking table with a conventional loading performance. The strain of the tunnel around the soft-hard interface increases significantly, and the maximum strain occurs within the range of 1 D (D is the outer diameter of the tunnel) in the soft soil near the interface along the direction of tunnel's length. In one observation section, the largest strain appears at the crown or bottom, followed by those at the spandrel, haunch, and knee. The region affected by the soft-hard interface is approximately 1 D in the hard soil and 2 D in the soft soil. The accelerations in the hard and soft soil are amplified, and the acceleration amplification factors gradually decrease with an increase in the excitation amplitude. The peak ground acceleration in the soft soil is smaller than that in the hard soil in the case with a larger excitation amplitude. The tunnel is curved in the vertical direction, owing to the soft-hard stratum. This study may provide a reference for shaking table tests for ultra-large diameter shield tunnels at complex sites.