Electrochemical process for the recovery of metallic iron and chlorine values from iron-rich metal chloride wastes
An electrochemical and chloride technology, applied in the direction of optics, electrolytic process, electrolytic components, etc., can solve problems such as inconsistency in industrial production, complex equipment, pollution, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0145] Preparation of Iron-Rich Metal Chloride Solution and Separation of Unreacted Solids.
[0146] A 10 kg batch of anhydrous chlorinator dust, the by-product of carbochlorination of concentrated titania-rich slag (UGS), was supplied by a titania pigment producer. The material was first mixed with hot acidified water initially containing 10 g / L free hydrochloric acid (HCl) at 80°C to leach out all soluble metal chlorides. After complete dissolution of the soluble salts, the resulting hot and dense slurries were filtered under vacuum using large 240-mm ID Buchner funnels (CoorsTek) each having a capacity of 4.5 liters. The Buchner funnel was mounted on top of a 10 liter Erlenmeyer vacuum flask (Kimax) connected to a vacuum pump. The filter medium used was a disc-shaped ashless filter paper No. 42 (Whatman). In order to increase throughput, four of these Brinell-Even modules are operated in parallel at the same time.
[0147] The obtained filter cake was carefully washed wi...
Embodiment 2
[0154] Example 2a - (Electrolysis of an initial concentrated iron-rich metal chloride solution at pH 1.1). - The aforementioned concentrated iron-rich metal chloride solution obtained from Example 1 was adjusted to pH 1.1 simply by adding traces of magnesium oxide and then circulated inside the cathode compartment of the electrolytic cell. The electrolyser consisted of a filter press design model MP cell from Electrocell AB (Sweden) with The two compartments were separated by an anion exchange membrane made of I-200 (SnowPure LLC). The geometric surface area of the electrode and membrane is 100 cm 2 , the distance between each electrode and the spacer is 6 mm.
[0155] The cathode compartment included a cathode plate made of a titanium palladium alloy (ASTM grade 7; Ti-0.15Pd) supplied by Titanium Industries. Before electrolysis, by immersing the cathode in a fluorine-nitric acid mixture (70vol% concentrated HNO 3 , 20vol% concentrated HF and 10vol% H 2 O) Chemically e...
Embodiment 3
[0170] Recovery of iron and vanadium from the iron-vanadium deposit of Example 2a - the metal deposit was ground into a pulverisette mill (Fritsch) and the resulting powder was treated under pressure with a caustic solution of sodium hydroxide (NaOH 50 wt.%) Treatment was at 100°C for two hours into a 125 mL PTFE-lined digestion bomb (Parr Company). After cooling, the solution was filtered to recover insoluble iron metal fines. Then, excess ammonium chloride (NH 4 Cl) is added to the vanadium-rich liquid to make pure ammonium metavanadate (NH 4 VO 3 )precipitation. The pure ammonium metavanadate was later fired in a chamber furnace (Fisher Isotemp) at 400 °C in dry air inside a porcelain boat to release ammonia (NH 3 ) and water vapor (H 2 O), resulting in a reddish-orange powder of vanadium pentoxide. The powder was then transferred to an Inconel crucible and melted in air at 700 °C and the melt was cast onto a cold steel plate. The resulting solidified black mass with...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More