Patent · US Expired

Method for processing a heavy-metal-containing residue from the chemical industry

US4651656A · kind A · utility

10Cited by

5References

14Claims

0Family size

Assignee

Voest-Alpine · AT

Inventors

Felix Wallner · Linz, AT
Adam Krier · Linz, AT
Walter Lugscheider · Linz, AT
Gotthard Uckert
Paul Freimann · Ternitz, AT

Key dates

Filing date	Oct 30, 1984
Grant date	Mar 24, 1987
Priority date	—
Expiry date	Oct 30, 2004

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10J2300/1807
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

There is disclosed a method for processing heavy-metal-containing residues from the chemical industry. For an economical and at the same time ecologically safe processing of the heavy-metal-containing residues, the heavy-metal-containing residues are introduced into a primary-gas reaction zone of a shaft gasifier containing at least one solid bed of carbon-containing material. Slag-forming substances are introduced together with the charge substances and/or together with the solid-bed formers to absorb and set the heavy metals. The lower zone of the solid bed is maintained at a temperature above the slag and ash melting temperatures. The viscosity of the slag is less than 100 poise.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.