The recovery of indium (In) from spent LCD screens represents an avenue of interest to meet the growing market demand for this strategic metal. The main purpose of …

Indium/Cadmium Recovery Copper Smelting Slag Copper smelting slag is produced from copper pyrometallurgy (both smelting and converting stages), usually grading at 0.3-3%. …

The invention provides a method for recovering copper, indium, gallium and selenium. The method comprises the following steps of: recovering the indium by carrying out electrolysis by taking a CIGS (Copper Indium Gallium Selenium) waste material as an anode; recovering the gallium by leaching precipitates, namely anode mud and the like, and …

The optimal conditions for indium recovery using polymeric inclusion membranes are: stirring time of 3.1 h, a mass ratio of 1.44 (m D2HEPA /m PVC), a feeding phase pH = 3.0 and [HCl] 6.0 M in the re-extraction phase with indium recovery and an indium concentration of 110 mg/L after ten extractions. The polymer inclusion …

recovery of ITO. The filter cake appeared as two parts, film shape part and granular part as in Figure 3a. In the part A, many of irregular film pieces were found. According to the energy dispersive spectrometer (EDS) analysis as shown in Figure 3b its major component was indium. Therefore we estimated that these pieces came from ITO.

A kind of from the method containing indium flue dust recovery indium TWI636139B (en) * : : : Method to extract the indium, gallium and zinc from spent igzo target DE102017107097A1 (en) : : Technische Universität Bergakademie Freiberg

Cementation of germanium from sulphate solution obtained after the leaching of GeIn dross using zinc dust was investigated. The composition of the examined solution was 5.15 Ge, 1.52 In, and 5.81 g/dm3 Zn. In order to resemble the solution before detinning, Sn concentration between 2–10 g/dm3 was also investigated. It was found that >99% of …

1. Introduction. Indium is known as one of the scattered and valuable metals in the IIIA column of the periodic table [1], which can be used to synthesize varieties of compounds with favorable semi-conductive or optoelectronic performance [2].Due to its specific functional applications, Indium plays an important role in transparent conductive …

This paper shows a review of literature data on the possibilities of indium recovery from ITO layers of waste LCD and LED displays.

Section snippets Results and discussion. Fig. 1 shows the different processes of recycling and recovery of CIGS thin-film solar panels. The recovery of valuable metals from CIGS solar panels into high purity oxides can be separated into four steps: physical separation, acid leaching/solvent extraction, stripping/chemical precipitation, and …

Indium is regarded as an important strategic resource because it is a rare metal and mainly used in electronics industry. It has no minerals of its own so that it has to be produced as a by-product of other metallurgical processes. 1,2 The largest end use for indium is in thin-film coatings as a mixture of 80–90 wt% indium oxide (In 2 O 3) and …

Indium and its compounds have many industrial applications and are widely used in the manufacture of liquid crystal displays, semiconductors, low temperature soldering, and infrared photodetectors. Indium does not have its own minerals in the Earth's crust, and most commonly, indium is associated with the ores of zinc, lead, copper and …

A process for extracting of indium from indium-enriched cementation produced in zinc hydrometallurgy process was investigated by oxygen pressure leaching …

Indium mining is associated with base metals containing ores enriched in zinc, copper, lead, and tin. Low concentrations of indium, typically between 20 and 350 parts per million (Frenzel et al. 2017; …

indium, ranging from US $520 to 760 per kilogram from 2013 to 2014. In the second quarter of 2015, the price ranged from $520 to $550 per kilogram [4]. The increased manufacturing efficiency and recycling of indium can create a balance between the demand and the supply of indium [5]. The recovery materials from In-

This poster will outline the deportment and processes for the recovery of indium Discover the world's research 25+ million members …

Scarcity and high demand has placed an economic pressure on the supply of indium worldwide; therefore, there is a global interest in increasing the recycling capacity for indium. This project's main goal is the identification of secondary raw material resources for …

I claim: 1. Process for the selective recovery of indium from an aqueous sulfate solution of indium and other metals comprising at least zinc and iron, said indium being present in said aqueous sulfate solution as an impurity in a concentration of less than 1 gram per liter and in the III oxidation state, said aqueous sulfate solution having a hydrogen ion …

The recovery of indium from LCD screens is currently performed using processes such as solvent extraction (Ruan et al., 2012, Virolainen et al., 2011), selective precipitation (Jiang et al., 2011), and a vacuum-chlorinated separation method (Ma et al., 2012). The concentrations of hydrochloric, nitric, and sulfuric acids used in the leaching of ...

The present study evaluates the reductive leaching of indium from indium-bearing zinc ferrite using oxalic acid as a reducer in sulfuric acid solution. The effect of main factors affecting the process rate, including the oxalic-acid-to-sulfuric-acid ratio, stirring rate, grain size, temperature, and the initial concentration of synergic acid, was …

Possible pathways for indium recovery from waste LCDs (Gotze and Rotter, 2012). 2.1. Pretreatment of waste LCDs. Pre-treatment is an indispensable part to obtain the clean ITO glass as raw materials to recover indium from waste LCDs. First of all, the waste LCDs need to be dismantled to break the plastic shell, and to dismantle the backlight ...

12) Using your stirring implement, try to push a good amount of the molten indium together into one blob on one side of the beaker. Now decant the oil into a waste receptacle. 13) Place beaker back on heat for a short time just to ensure the indium is molten. Make sure most of the material is in one corner of the beaker.

According to Kim [40], more than 6 V was required through continuous deionization system to recover indium, therefore, high voltage induced low recovery of indium (Fig. 4a and b). When the current was 1–5 A with 10 V, the recovery rate peaked at 73.8% of 5 A current at 2 h, but the electrode disintegrated at 4 h afterwards.

Leaching of the dross containing 28.7% Sn, 18.0 Pb, 10.6% Cu, 8.9% Ge, 8.1% Zn, and 2.7% In in sulphuric and oxalic acid solution was investigated. The dross was obtained from thermal oxidation of by-product alloy generated during a New Jersey (NJ) zinc rectification process. The influence of different process conditions (temperature, time, …

The overall recovery yield of indium through all processes was approximately 92%. INTRODUCTION Indium is one of the most widely dispersed elements in the earth's crust. It does not occur as an ore itself but is usually found in association with zinc-bearing materials such as sphalerite and mar-matite.1,2 Indium is therefore an important by-

The overall recovery yield of indium through all processes was approximately 92%. INTRODUCTION Indium is one of the most widely dispersed elements in the earth's …

Other work [8, 9] studied the recovery of indium from waste ITO by leaching in sulfuric acid, followed by solvent extraction using D2EHPA diluted in kerosene as the organic phase. A follow-up ...

Introduction Indium is a scarce metal with a 0.1 ppm abundance in the earth's crust comparable to that of silver. 1,2 It is labeled as a critical raw material by the European Commission, due to its high …

3 hydroxide. Shimofusa et al. [10] have patented a method in which indium is recovered by solvent extraction from nitric acid solution, which includes heavy metals as impurity but the

The TFT material is a layer of indium-tin oxide (ITO) with a thickness of approximately 150 nm, where the ratio between indium oxide and tin oxide is approximately 9 to 1 by weight. In 2010 indium was listed by the European Commission in a report as one of 14 critical raw materials, based on assessments of its supply and economic importance [4].