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  • Slag

    Slag is a by-product of smelting (pyrometallurgical) ores and used metals. Broadly, it can be classified as ferrous (by-products of processing iron and steel), ferroalloy (by-product of ferroalloy production) or non-ferrous/base metals (by-products of recovering non-ferrous materials like copper, nickel, zinc and phosphorus). Within these general categories, slags can be further categorized by

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  • Method for removing slag on the surface of molten metal by

    A more effective method is to use a slag cleaner that is positioned above the slag and draws it off by suction. A typical slag cleaner is illustrated in Fig. 1, wherein a slag cleaner 4 with a suction head 5 is positioned slightly above the surface of the slag 3 floating on molten iron 2 in a vessel 1.

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  • Iron Ore Mining | Techniques | Metal Extraction

    The extraction of iron from its ore is a very long and forlorn process that separates the useful components from the waste materials such as slag. What happens in the Blast Furnace? A blast furnace is a gigantic, steel stack lined with refractory brick where the concentrated iron ore, coke, and limestone are dumped from the top, and a blast of

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  • Extraction of Gold from Refractory Gold-Bearing Ores by

    A brief analysis of the existing and developed methods for processing refractory- and double-refractory gold raw materials showed the futility of focusing on the existing modern technological schemes, which, despite being considered effective, in many cases are fundamentally incapable of providing efficient processing of such ores [5,6,7,8,9,10,11,12,13,14,15].

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  • Gold Smelting & Refining Process

    This layer is called speiss. At the bottom is located the lead button with gold and silver. Slag appearance is a good indicator of the process. Although iron minerals have influence on color slag, it is possible to draw some conclusions according to the color. For example, a blue color is symptom of copper minerals.

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  • Gold Ore

    Gold ores are classified “free-milling” and “refractory” based on their response to cyanide dissolution. Bioprocessing can be used to treat refractory gold-bearing sulfide ores as well as carbonaceous gold ores. It is essential to characterize different types of gold ores to understand the extent and nature of gold-entrapment in different associated mineral phases before an appropriate

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  • Gold Processing | Equipment, Process Flow, Cases

    Gold flotation. Flotation process is widely used for lode gold processing. In most cases, the flotation method has a good effect in sulfide-containing gold ore with high floatability. In addition, the flotation process is also used for polymetallic gold-bearing ores such as gold-copper, gold-lead, gold-copper-lead-zinc-sulfur ore.

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  • Smelting and Roasting Ores to recover gold, silver and

    The addition of scrap iron to smelt mixes is a useful technique to small-scale operators experimenting with smelting techniques on gold-silver ores. It could also be used with small lots of sulfide concentrates. On the other hand, there are alternatives for processing sulfide ores.

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  • Searchlight Minerals Corporation Announces Operations

    The revisions to the Process System now make it possible to produce gold, iron and zinc oxide from the Slag Pile without grinding the raw slag with a High-Pressure Grinder Roller ("HPGR") or the

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  • Gold Refining Methods

    The slag prevents loss by projection or volatilisation, and the cost is trifling. This method is used at the Mint to toughen brittle standard gold. Oxidation by Nitre. This ancient Gold Refining method is one in that the nitre must be “ projected ” upon the gold just before it melts, as it has little effect on molten gold. The method is

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  • Gold Processing | Equipment, Process Flow, Cases

    Gold flotation. Flotation process is widely used for lode gold processing. In most cases, the flotation method has a good effect in sulfide-containing gold ore with high floatability. In addition, the flotation process is also used for polymetallic gold-bearing ores such as gold-copper, gold-lead, gold-copper-lead-zinc-sulfur ore.

    Get Price
  • Slag-What is it Good for? | U.S. Geological Survey

    Slag. Depending on where you’re from, it may be an insult, a term meaning trash, or, in our case, the waste left over from metal smelting or refining. Outside of the construction industry, it might seem that uses for slag are considered limited.

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  • 8 Types of Gold Ore- Properties and Ways to Process | Fote

    The amount of iron oxide copper gold ore is about 10 million to 4 billion tons. IOCG ore contains copper with a grade of 0.2% to 5% and gold with a content of 0.1 to 1.41 grams per ton. Iron oxide copper gold ore tends to be conical on the edge of granite, or appears as long banded breccia or massive iron oxide ore in faults or shears

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  • Searchlight Minerals Corporation Announces Operations

    The revisions to the Process System now make it possible to produce gold, iron and zinc oxide from the Slag Pile without grinding the raw slag with a High-Pressure Grinder Roller ("HPGR") or the

    Get Price
  • 8 Types of Gold Ore- Properties and Ways to Process | Fote

    The amount of iron oxide copper gold ore is about 10 million to 4 billion tons. IOCG ore contains copper with a grade of 0.2% to 5% and gold with a content of 0.1 to 1.41 grams per ton. Iron oxide copper gold ore tends to be conical on the edge of granite, or appears as long banded breccia or massive iron oxide ore in faults or shears

    Get Price
  • US6264039B1

    The present invention, therefore, provides stage crushing method for recovering precious metals from slag produced by a coal burning furnace or boiler comprising: a plurality of crushing steps, wherein each crushing step produces slag particles having successively smaller particle diameter sizes, said crushing steps continued until a final desired particle diameter sized is obtained; wherein

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  • gold processing

    gold processing

    The article presents an overview of the methods of processing slag from Waelz process, and various approaches employed by scientists globally, aimed at processing such slags. Despite several listed methods of processing slag from Waelz process, none entails a sufficient complex nature of its processing. In addition, the slag processed from the Waelz process, found in the dumps, has not been

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  • ironmaking in 18th century

    In the form phosphorus pentoxide P2O5, lime and p2o5 allow phos out, phos removal is a slag/iron interchange, that’s how the Bessemer process got it out, the charge boils up partly aided by the ex other mic silicon reaction at the start of the blow, the droplets of iron mix with the slag to remove S and P

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  • Electrolytic processes for gold and other precious metals

    Electrolytic Methods Used in Refining Processes of Gold and Other Precious Metals. Electrolysis is an electro-chemical process where an electrical current stream is flowing between two electrodes and through an electrolyte.This process involves the transfer of metal ions through the ionised electrolyte solution, depositing positive ions on the cathode and negative ions on the anode.

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  • Searchlight Minerals Corporation Announces Operations

    The revisions to the Process System now make it possible to produce gold, iron and zinc oxide from the Slag Pile without grinding the raw slag with a High-Pressure Grinder Roller (“HPGR”) or the use of an autoclave. This is achieved by fine-grinding the glass produced from the slag and leaching it in ambient conditions.

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  • The Gold Smelting Process

    Refining gold is simply the process of removing the finer impurities that the smelting process could not remove. There are several methods used to refine gold. The most common gold refining methods include: 1. Miller Process . This is a chlorination process that refines gold to a purity of about 99.5%.

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  • QUANTITATIVE ANALYSIS OF GOLD CONCENTRATE USING FIRE ASSAY

    Gold is a chemical element in the periodic table that has the sym-bol Au (aurum) with an atomic number of 79, and gold including a transition metal (trivalent and univalent) is shiny and yellow. Gold does not react with other chemicals and melt at temperatures 1000 C (1). Gold occurs in association with ores of lead, iron sul-

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  • The iGoli mercury-free gold extraction process

    In 2012, AGM accounted for approximately 12% of all the gold produced in the world. The main method of extraction used is gold amalgamation, a process which accounts for the release of between

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  • Steel-making processes

    The remaining methods for making steel do so by removing impurities from pig iron or a mixture of pig iron and steel scrap. The impurities removed, however, depend on whether an acid (siliceous) or basic (limey) slag is used.

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  • Ancient Metallurgy

    Lumps of gold, in contrast, are extremely dense and heavy. Many Chinese believe that eating a lump of gold was an aristocratic method for committing suicide in imperial times, since the heavy lump would overwhelm the digestive track and produce internal bleeding and death. and the considerable mining waste (or slag) could accumulate in

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  • How to Refine Gold: 2 Major Techniques of Gold Refining

    Mostly, the gold obtained through gold electrolysis is usually very pure, almost 99.999%. In fact, this procedure is the best method for processing gold with the highest karatage (24 Karats = 100 percent gold). This is why gold electrolysis is very common in countries where pure gold pieces are given priority over the ones with low karatage.

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  • Slag-What is it Good for? | U.S. Geological Survey

    Slag. Depending on where you’re from, it may be an insult, a term meaning trash, or, in our case, the waste left over from metal smelting or refining. Outside of the construction industry, it might seem that uses for slag are considered limited.

    Get Price
  • Abeka Chemistry Chapter 11 Flashcards | Quizlet

    Answers will vary. In a high-temperature furnace, a supersonic blast of pure oxygen is blown against the surface of teh molten iron, oxidizing the impurities; no external heat source is necessary. Lime and other fluxes are added to convert oxidized silicon impurities to slag; alloying metals or carbon may also be added.

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