GB736686A - Method of roasting sulphidic ores - Google Patents

Method of roasting sulphidic ores

Info

Publication number
GB736686A
GB736686A GB7258/52A GB725852A GB736686A GB 736686 A GB736686 A GB 736686A GB 7258/52 A GB7258/52 A GB 7258/52A GB 725852 A GB725852 A GB 725852A GB 736686 A GB736686 A GB 736686A
Authority
GB
United Kingdom
Prior art keywords
coolant
air
velocity
roasted
ore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB7258/52A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Group AG
Original Assignee
Metallgesellschaft AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG filed Critical Metallgesellschaft AG
Publication of GB736686A publication Critical patent/GB736686A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/10—Roasting processes in fluidised form

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A turbulent layer of sulphide ore is cooled indirectly whilst being roasted with a gas containing oxygen by traversing a part of the cooling elements with a gaseous or vaporous coolant, e.g. air or superheated steam, and the other part which is not directly connected to the first part of the cooling elements by a liquid coolant, e.g. water, or a salt melt, molten metal, high boiling oil or other compound not having a substantial vapour pressure at high temperature. By varying the velocity of the coolant gas, the degree of cooling is readily controlled. In the example, zinc blende, a copper ore, and pyrrhotite are roasted at 900 DEG C., 700 DEG C. and 850 DEG C. respectively, using water as liquid coolant and air as the gaseous coolant. The roasting gases are passed to a sulphuric acid plant. When using air as the coolant, after being heated in the turbulent layer, it may be introduced into the furnace above the layer for after-combustion or used to dry the ore. Optimum velocity for the roasting gas is stated to be 0.6-1.5 metres per second, measured above the bed; with this velocity, roasted material may be withdrawn from the bed rather than recovered from the gases.
GB7258/52A 1951-08-22 1952-03-20 Method of roasting sulphidic ores Expired GB736686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE736686X 1951-08-22

Publications (1)

Publication Number Publication Date
GB736686A true GB736686A (en) 1955-09-14

Family

ID=6642383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7258/52A Expired GB736686A (en) 1951-08-22 1952-03-20 Method of roasting sulphidic ores

Country Status (1)

Country Link
GB (1) GB736686A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908284A (en) * 1971-09-29 1975-09-30 Ceskoslovenska Akademie Ved Method of and apparatus for heat transfer in a fluidized bed
EP0041648A2 (en) * 1980-06-05 1981-12-16 STAL-LAVAL Turbin AB Fluidized bed combustion chamber
AT404641B (en) * 1995-05-16 1999-01-25 Andritz Patentverwaltung METHOD FOR CONTROLLING AND / OR REGULATING A DRYING PROCESS, ESPECIALLY PAPER DRYING

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908284A (en) * 1971-09-29 1975-09-30 Ceskoslovenska Akademie Ved Method of and apparatus for heat transfer in a fluidized bed
EP0041648A2 (en) * 1980-06-05 1981-12-16 STAL-LAVAL Turbin AB Fluidized bed combustion chamber
EP0041648A3 (en) * 1980-06-05 1982-04-07 Stal-Laval Turbin Ab Fluidized bed combustion chamber
AT404641B (en) * 1995-05-16 1999-01-25 Andritz Patentverwaltung METHOD FOR CONTROLLING AND / OR REGULATING A DRYING PROCESS, ESPECIALLY PAPER DRYING

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