SU549663A1 - Pit furnace for lump material firing - Google Patents

Description

The invention relates to shaft furnaces for calcining lump material in the field of metallurgy, enrichment of iron-containing lump and pelletized ores, as well as to firing various construction and refractory lump and pelletized materials: limestone, dolomite, magnesite, cement clinker and others.

A well-known furnace containing a furnace with heating, firing and chilled areas, divided into sections by vertical refractory walls, in which channels and windows connecting heating sections and combustion chambers are made in the heating and firing zones, and air ducting channels are installed in the heating and firing zones window.

The disadvantage of this problem is the uneven and unregulated distribution of the gas flow through the furnace channel, a decrease in the useful volume of the burning and heating zones, as well as the supply of cold air from the cooling zone to the burning zone, which leads to a decrease in tenloexchange and material deterioration.

The invention eliminates these shortcomings, for which in the heating and firing zones the channels in the refractory walls are separated by horizontal partitions and each subsection formed by them is equipped with separate combustion chambers and

Air inlet channels and windows of the cooling zone are provided with gas outlet windows and channels.

FIG. 1 shows the furnace proposed in section; in fig. 2 is a longitudinal section along BB in FIG. one.

The furnace contains a shift / with loading devices 2, gas outlets 3, unloading devices 4, conveyors 5 of the finished material.

The proposed igniter is made of four sections 6, each two sections of which form an independent part of the furnace. The furnace is divided into sections by vertical refractory walls 7 with channels 8 and windows 9.

In the heating and firing zones, the channels 8 are separated by horizontal partitions 10, which form subsections 11 with chambers 12, fuel combustion, and burned torches 13.

In the cooling zone, air intake channels 14 and windows 15 are made, and air outlet windows 16 and channels 17 are placed above the channels 14.

Shaft furnace runs continuously. The source material in each half of the furnace and enters from a separate boot device 2 through a double cone filling device / 5.

Section section has an oval-semicircular shape with a large ratio of axes (for example 6: 1).

The middle wall of the two combined sections ends at the top with a metal distributor 19.

The burners 13 of the furnace are equipped with air duct 20 and gas lines 21. In the exposure zone preceding the cooling zone, the dividing walls 7 are made with silos.

The gases escaping from the cooling zone are directed to the dust chambers 22, in which they are free from dust, and directed to the combustion chambers and to be emitted into the atmosphere.

Claims (1)

Invention Formula A shaft furnace for burning lump material, containing a mine with heating, firing and cooling zones, is divided into sections by vertical refractory walls, in which channels and windows are made in the heating zones, connecting sections with combustion chambers and in the cooling zone air inlet channels and windows, characterized in that, in order to intensify heat transfer and material quality, in heating zones and channels in the refractory walls are separated by horizontal partitions and each formed by them under the section is equipped with separate combustion chambers, and the zone is cooled above the air supply ducts, and gas outlets and channels are provided. -sch: t  , W -t -U .. / Shh PC Ittij -cr --Ti X .-, V ( S ipus i 21 BV Rig. 2