The Concept of Slag Decopperisation in the Flash Furnace Process by Use of Complex Reagents

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The suspension of copper droplets in the slag is considered. The copper/slug suspension is delivered as the product from the direct-toblister process which is applied in the KGHM -Polska Miedź (Polish Copper) S.A. factory. The droplets / slag suspension was treated by a special set of reagents (patented by the authors) to improve the coagulation process. On the other hand, the observations are made to estimate if the melting / reduction process in the furnace is sufficiently effective to avoid a remaining of carbon in the copper droplets. The coagulation process was carried out in the crucible (laboratory scale). However, conditions imposed to the coagulation / solidification process in the laboratory scale were to some extent similar to those applied usually in the industry when the suspension is subjected to the analogous treatment in the electric arc-furnace. Some suggestions are formulated how to improve the industrial direct-to-blister process.

Section: Introductionmentioning

confidence: 99%

Sedimentation of Copper Droplets after their Coagulation and Growth. Laboratory Scale

Wołczyński¹,

Bydałek²

2016

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“…During the process there arise the two types of semi-finished products intended for further pyro metallurgical processing: anode copper and anode slag. In addition to the essential characteristics of the technological process as maintaining the viscosity of the slag, atmosphere, and temperature [3,4]. It is necessary to analyze the composition of the charge, both in terms of its composition and rheological characteristics while moving in the furnace [4,5].…”

Section: Introductionmentioning

confidence: 99%

Structural Analysis of the Selected Products From the Suspension Furnace Produced in the Internal Recycling

Bydałek

Schlafka

Grządko

et al. 2017

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There are presents the internal recycling in anode furnace, in addition to mainly blister copper and converter copper. During the process there arise the two types of semi-finished products intended for further pyro metallurgical processing: anode copper and anode slag. The stream of liquid blister copper enters into the anode furnace treatment, in which the losses are recovered, e.g. copper, resulting from oxidation and reduction of sulfides, oxides and the oxidation of metallic compounds of lead, zinc and iron. In the liquid phase there are still gaseous states, which gives the inverse relationship relating to the solid phase, wherein the gases found an outlet in waste gas or steam. The results of chemical analysis apparently differ from each other, because crystallite placement, the matrix structure and the presence of other phases and earth elements are not compared, which can be regained in the process of electrorefining. One should not interpret negatively smaller proportion of copper in the alloy, since during the later part of the production more elements can be obtained, for example from sludge, such as platinum group metals and lanthanides. According to the research the quality of blister copper, to a large extent, present in the alloy phase to many other elements, which can be recovered.

“…The discussed concept takes into consideration the impact of the non-carbon reagents, and this constitutes the next aspect of its originality [1][2][3]. Most of the methods of pyrometallurgical recovery of copper from post-process slag, including those applied in copper smelter in Głogow (Poland), employ coal in the form of coke or coal briquettes [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The article presents an outline of the new technology of pyrometallurgical processing of slag in the direct-to-blister process. A new way of implementing the technology of recovery of copper from the flash furnace slag by means of different feedstocks has been proposed [3,6,9,[13][14][15][16]. A core of the paper is focused on a method for an assessment the effect of selected reagents on the slag's state after its refining.…”

Section: Introductionmentioning

confidence: 99%

Determining the Degree of Removal of Copper From Slag

Bydałek

Migas

Wołczyński

et al. 2016

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The scope of work included the launch of the process of refining slag suspension in a gas oven using a variety of technological additives. After the refining process (in the context of copper recovery), an assessment of the effect of selected reagents at the level of the slag refining suspension (in terms of copper recovery). Method sieve separated from the slag waste fraction of metallic, iron -silicate and powdery waste. Comparison of these photographs macroscopic allowed us to evaluate the most advantageous method of separating metallic fraction from the slag. After applying the sample A (with KF 2 + NaCl) we note that in some parts of the slag are still large amounts of metallic fraction. The fraction of slag in a large majority of the elements has the same size of 1 mm, and a larger portion of the slag, the size of which is from 2 to 6 mm. Definitely the best way is to remove the copper by means of the component B (with NaCl ) and D (with KF 2 ). However, as a result of removing the copper by means of component C (with CaO) were also obtained a relatively large number of tiny droplets of copper, which was problematic during segregation. In both cases we were able to separate the two fractions in a fast and simple manner.