Process for directly reducing ferrochrome powder ore by microwave and crucible special for same

A kind of ferrochromium powder, direct technology, applied in the field of process and the special crucible for this process, to achieve the effect of recycling, cost reduction and low price
CN102051482BInactive Publication Date: 2012-10-24兰州三普电力有限公司
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
兰州三普电力有限公司
Publication Date
2012-10-24
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a process for directly reducing ferrochrome powder ore by microwave, comprising the following specific steps of: (a) preparing a furnace charge including 67-74 percent of ferrochrome powder ore, 18-23 percent of reducing agent and 8-10 percent of solvent; and (b) uniformly bulking and paving the furnace charge in the crucible at the paving thickness of 3.0-4.0cm, adding ananti-sticking layer in a main body of the crucible, sequentially adding an heat-insulating layer and a fixing layer for fixing the heat-insulating layer outside the main body and heating the furnace charge in the crucible to 1,450-1,480 DEG C and reducing for 90-120 minutes; and carrying out the crushing by a jaw crusher and electromagnetic separation on the reduced furnace charge to obtain granular carbon ferrochrome. In the invention, the reduced products contains chrome of 48-50 percent; the metallization rate is not less than 78 percent and the recovery rate of Cr is not less than 85 percent, which are equivalent to indexes of an ore heating furnace product; in addition, the traditional process for melting ferrochrome by carbon coke and blue carbon can be eliminated and the non-coke carbon metallurgy can be realized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a process for producing carbon ferrochrome, in particular to a process for directly reducing ferrochrome powder ore by microwaves to obtain carbon ferrochrome and a special crucible for the process. technical background:

[0002] At present, carbon ferrochrome is produced by submerged arc furnace, which has the disadvantages of high energy consumption, heavy pollution, difficult process control and poor working conditions. With the increasing requirements for energy saving, emission reduction and carbon emission reduction, this process has been eliminated, and it has become an urgent task to transform the traditional ferroalloy industry with high technology.

[0003] Microwave belongs to clean energy, and its heating efficiency is as high as 95%, which is much higher than that of general heating methods (only 30%~40%). It still has the advantages of energy saving, emission reduction and easy control. Not only that, but als...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More