JPS63153384A - Method of starting downdraft tyep cupola - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The basic structure of the downward draft cupola (abbreviated as Attachment 1 - Basic Furnace) is that the upper firebox F has one floor surface and the middle coke packed bed Pk is a simple cylinder. In the lower flue corridor Ro
The cross-sectional area of is set to be greater than or equal to the cross-sectional area of Pk → This is a three-column set. (
Literature #1. #2) Initial coke and limestone are first charged from the furnace lid M2 of this basic furnace, and treated materials (combustibles and non-combustibles) are secondly charged from the furnace lid Mt. After creating the deposit RCJ and igniting the deposit RCJ, air is blown through the tuyere T drilled into each type of rF-PkJ.
According to F, "The downward flame flow J becomes a reducing flame accompanied by sparks C, and the temperature rises at several stages of tuyere T (C temperature rise limit is above the melting point of carbon #3600'C: References #3 and #4) #75 crQ lower temperature in Pk in a short time (within 30 minutes without hot air equipment) 1629 (higher temperature than deposit body RCJ)
℃ → “W furnace temperature reversal phenomenon: W phenomenon, which melts iron materials.
``and abbreviation'', causing the flue corridor R.

and flows out into the flue.

``Injecting water vapor (including impurities)'' into carbonized materials and non-combustible materials at 1629°C causes an exothermic reaction of carbon into water gasification.
Solid matter fragmentation - eruption (abbreviated as steam injection eruption),
The high temperature water gas flame flows out to D along with the main flow.

"X-phenomenon temperature increase spark C" reduces the oxide corresponding to its exothermic temperature as shown in Attached Table 2-3-4. References #3 and #4),
The metal hot water drips into the "cut coke layer" and is taken out from the tap H of the hot water reservoir Br together with the molten slag.

However, even if the deposit RCJ is smoke-emitting, it becomes smokeless in the space above →F by turning it into a water-containing state or by water injection and steam injection. -Each device for dust collection during crushing (Ro operation document #2) is omitted.

What the final method added to the basic furnace structure is, firstly, the floor of firebox F was made into two steps St (Fig. 1) and Fig. 2-
These are the two points (line Pk in the cross-sectional perspective view).

, by lateral expansion of the secondary section of this final reactor, the "deposit body RIRx
R-J creates a mountain ridge line → Therefore, the distance between "the lower end of R3 mountain ridge line" and the upper end of R1 in rRo" is shortened,
Because the flow resistance of the flame is small, the pressure in the space above r F - Pk is also small, and the steady pressure in the space above r F - Pk is small. ” to ease → structure.

Furthermore, "steam blowing" also stirs the inside of the deposit and transports it to the lower part of the mountain ridgeline.

The same functions as other basic furnaces are as follows: 1. 1. In the space above the upper floor surface SI of the upper F, "Smokeless substitute production of F" is performed.
! The ``W phenomenon of the basic reactor Pk'' occurs in the ``deposit body R1'' in the ``deposit body R1'', and the ``W phenomenon'' also occurs secondarily in the ``deposit body RiJ'' in the middle stage.

"X phenomenon temperature increase in R1 and R3" is because the temperature of the spark C is increasing → the temperature in Rs becomes high.

Next, the ``carbide temperature increase'' around T due to ``compressed oxygen injection'' during the starting process is higher than the ``air injection temperature increase'' (+900
~Too degree → Attachment 3/Reference #3)-T) 162
9°C The distance between carbides is reduced, and the temperature rise time is also shortened → Therefore, it is easier to operate high-temperature furnaces in advanced furnaces than in basic furnaces.

However, "compressed oxygen" is "pure oxygen" with COl, or H,
0 Water vapor is mixed (°, ° to prevent explosion of "pure oxygen" caused by high-temperature dust and rust) → The spark C temperature increase due to this mixture is the same as that of "pure oxygen."

The final method is that ``compressed oxygen'' and ``steam injection'' → omit the cupola blower; ``steam injection eruption'' is ``omitted the stirring and conveying device for the deposit R+ -Rx J; Omitting the ore roasting furnace → has more advantages than the basic furnace.

The powder method facilitates reduction work at >2,000℃, and ``decomposes things'' or transforms ``rare earth element compounds'' by ``steam injection eruption'' at >2,162℃. Vitrification → Further vitrification by adding to the hot water tank Br.
It can be taken out from the tap H of r. (Reference #4) (3-4) Reference #1 Proceedings of the Japan Society of Mechanical Engineers 1'h 790-16 p271'2
1 1 t'h 820 15 p
47#3 N Lecture summary collection Katsu 386-1 ps
.

#4 〃 Collection of Lectures, Volume 864-4, p. 61 Figure 1 shows the secondary section of the single-stage reactor.

FIG. 2 is a cross-sectional overhead view of the floor surface S+ 5t-Pk of F in FIG.

Claims (1)

[Scope of Claims] The floor surface of the upper firebox F is a two-step surface S_1-S_2, and at the tip thereof, a middle cylinder with an oval cross section: a coke-filled bed Pk is placed. ￥ Flue corridor Ro ￥ (with a hot water reservoir Br drilled through the outlet H)
Gravity flow is created in "Pk-Ro" with the primary input materials (coke and limestone) from "furnace lid M_3-M_4" directly above k; Hearth M_1
-M_2'' is used for the second time to create the ``mountain ridge deposit R_1-R_2'' on the ``step surface S_1-S_2'' and then start operation. To start, after igniting the combustibles in the "deposit R_1-R_2-R_3-R_4" through the tuyeres T drilled into each wall of "F-Pk-Ro", "compressed oxygen" is blown from the T, and the surrounding area of the T is ignited. When the temperature of charcoal is raised to >1629℃ → 1 part T of "compressed oxygen"
A method for starting a downward draft cupola.