Patent · US Expired

Process for preparing binder-free hot-briquets

US4533384A · kind A · utility

8Cited by

8References

9Claims

0Family size

Assignee

Thyssen Aktiengesellschaft vorm August Thyssen-Hutte · DE

Inventors

Heinrich Rellermeyer
Werner Kaas · Dinslaken, DE

Key dates

Filing date	Jun 16, 1983
Grant date	Aug 6, 1985
Priority date	—
Expiry date	Jun 16, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S75/961
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic iron. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. to 650.degree. C. This is followed by hot-briquetting.

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