SU1392032A1 - Method of cyclone smelting of dustlike polydispersional process raw material - Google Patents

Abstract

This invention relates to glass melting technology in cyclone melting chambers. The aim of the invention is to increase productivity and reduce energy consumption. Dusty technological technology has a polydisperse particle size distribution (0-400 microns). The method consists in dividing the raw materials according to the size of the fractions into two streams. 80-90% of cells with sizes of 50-100 microns are blown into the chamber in a pulverized state, and of the rest, in the upper part, the mold is uninterruptedly changing the lining. The non-melted peripheral part forms an internal melting chamber, in which heat treatment of the raw material is carried out. Having melted along its inner surface, the removable lining is deformed in the lower part and lowered under the action of its own gravity. The application of the method reduces the heat treatment time, and the replacement of footers -. Each process raw material allows regeneration of heat fluxes of the melting zone. 1 nl., 1 tab. (/

Description

113

FIELD OF THE INVENTION The invention relates to the building materials industry, in particular, to glass production technology.

The purpose of the invention is to increase the productivity and reduce the specific energy consumption.

The drawing shows a diagram of the melting process.

The dusty polyfine granularity of the granulometric composition is fed into the classifier 1 for separating from it fractions having sizes of 50-100 microns. For multi-component charges, for example for glassworks, separation into 2 streams is carried out in a weight ratio of 1 / 9-2 / 8 in order to prevent stratification of the charge in classifier-1. FUEL; the oxidic acid and the separated fractions of the raw material (80-90%) are blown down through the roof of the pipes 2 into the: working space 3 of the cyclone chamber .. Of the remaining fractions (10-20%) after classification, Here, parts of the cyclone are continuously molded continuously replaced by lining 4 according to the known technology of self-hardening mixtures. The process of heating and melting of the side walls and the arch of the shifts in the linings 4 takes place along their inner surface. At the ends of the pipes 2 there are burner devices 5. Dusty particles of the raw material, being in a vortex flow, are in contact: with the combustion products, they are heated, and partially melted, separated on a film of the melt flowing down the walls into the bath 6. For the removal of smelting products cyclone It has a clamp 7 in the tray 7. The movement of the walls and the fence is carried out under the action of its own weight as the side wall melts and deforms in the lower part. The continuous process of movement of fences ensures complete regeneration of heat flows into the working chamber;

The indicated sizes of the cyclone were obtained for the case when particles with a size of 50-100 µm are fed to the pulverized state. Due to the narrow size range, the capacity varies slightly (from 6.2 to 6.3 t / h in the melt). When particles of less than 50 microns are injected into the cyclone, significant fencing occurs in the wall, and used for treatment in gas and ash (for 3.6%). The use of the volume of a cyclone in a narrow range of frac particles with a size of more than 100 microns increases the raw material (50-100 microns instead of 0-400 microns). This reduces fuel consumption and increases productivity of the cyclone.

The application of the method allows you to create an apparatus without garnish fences when organizing cyclonic heat treatment time in it.

Both going beyond the size values will result in poor performance. A further reduction in the range, for example, to 63-50 microns (this will amount to 67.64% of the injected feed, (see table) will determine the flow

D

melting process. The sieve analysis of the cyclone feedstock is presented in the table.

PRI m e Ra The cyclone energy-potential unit ETA-1 of the Dzhambul Superphosphate Plant has a raw material capacity of 7 t / h (including the volatiles); on raspva 6.25 t / h and dimensions diameter cyclna Vts1640 mm; height of cyclone Нц 2460 mm.

The smelting method can provide the indicated performance of ETA-1 when the raw material is fed in the pulverized state by 80%: Vc 1640 mm,

„Racie J - ch

Нц 1713 mm,

DH 1100 mm

by 90%:

Du 1640 mm

rbc

NG 1713 mm.

De

1440 mm.

I. 2460 mm.

Pi

H,

1440 mm, 2460 mm.

c 670 mm

In dimensionless quantities

H

racy

N.

D.

D,

1.04 --- 1.50, 88.

D

D.

DU

when applying 80% - 0,67,

DI

P.

at 90% feed

D

: - 0.41,

D

where Ots is the diameter of the cyclone; Dj is the diameter of the bath; Вц is the initial internal diameter of the melted shell,

Hh, is the height of the cyclone,

T Rasch „

h c - the calculated height of the cyclone

D

cameras.

The indicated dimensions of the cyclone were obtained for the case when particles with a size of 50-100 µm are fed into the pulverized state. Due to the narrow size range, the capacity varies slightly (from 6.2 to 6.3 t / h in the melt). When particles less than 50 μm are injected into the cyclone, significant ablation occurs (for 3.6%). The use of particles larger than 100 microns is increased

 ablation (for 3.6%). The use of particles larger than 100 microns is increased

Cheat cooking time.

Both going beyond the size values will result in poor performance. A further reduction in the range, for example, to 63-50 microns (this will amount to 67.64% of the injected feed, (see table) will determine the flow

in the fence 32.36%, causing their thickening and long-lasting effect to be lost.

When submission to the fence less than 10% of technological raw material is provided:

a full regeneration of heat fluxes, since at the calculated height and heating rate the heat flux from the melting zone will reach the outer surface; .

b) sufficient strength in the bath zone of the melt, which can lead to a breakthrough of the molten product.

When feeding more than 20% of raw materials into fences, based on sieve analysis (see tab), the particle size range is expanded, therefore, fuel consumption is increased and productivity of the proposed smelting method is reduced.

Claims (1)

Invention Formula The method of cyclone melting of pygmy polydisperse process raw material by supplying raw materials and fuel and melt removal from the bottom, characterized in that, in order to increase productivity and reduce specific energy consumption, the raw material containing 80-90% of the fraction 50-1 b O micron, classify, extract this fraction and blow it into the furnace, and from the remaining part of the raw material after the classification, a continuously replaceable lining is formed. Fuel oxidizer