Manganese-rich slag electric furnace mounted with condensation lining

A manganese-rich slag and electric furnace technology, applied in the direction of the overall lining, can solve the problems of the furnace lining being easily corroded, affecting production, frequent maintenance of electric furnaces, etc., and achieve the effect of reducing maintenance probability and maintenance cost

Active Publication Date: 2009-04-29
JIAOCHENG YIWANG FERROALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a manganese-rich slag electric furnace equipped with a condensing furnace lining in order to solve the problem that the existing mangan

Method used

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  • Manganese-rich slag electric furnace mounted with condensation lining
  • Manganese-rich slag electric furnace mounted with condensation lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Taking the 18000KVA electric furnace as an example, the specific structure is described as follows:

[0025] 1. Electric furnace parameters:

[0026] Compared with the existing manganese-rich slag electric furnace with the same capacity, the present invention increases the diameter of the furnace shell by +10%, the diameter of the furnace by +12%, the depth of the furnace by +20%, and the diameter of the core circle by +10%.

[0027] Electrode diameter 1100mm

[0028] Furnace shell diameter 12300mm

[0029] Furnace shell height 4900mm

[0030] Furnace diameter 11242mm (including high alumina brick protective layer)

[0031] Hearth depth 3200mm

[0032] Polar garden diameter 3400mm

[0033] 2. Electric furnace cooling:

[0034] After the temperature of the furnace shell reaches 70°C, the furnace shell is sprayed with water, and the bottom of the furnace is ventilated and cooled. The thermal conductivity of the steel plate is 49w / m°C, which can transf...

Embodiment 2

[0056] Example 2: 9000KVA manganese-rich slag electric furnace

[0057] 1. In order to form the condensing furnace lining, the parameters of the selected 9000KVA electric furnace are:

[0058] Electrode diameter 900mm

[0059] Furnace shell diameter 10000mm

[0060] Furnace shell height 4300mm

[0061] Hearth diameter 9402mm

[0062] Hearth depth 2757mm

[0063] Polar garden diameter 2900mm

[0064] 2. The furnace shell is sprayed with water, and the furnace bottom is ventilated and cooled: the air volume of the furnace bottom fan is 50000m 3 / h.

[0065] 3. Open the furnace: Use wood to bake the furnace for a whole day and night to dry the furnace lining and bake it with a low fire in the early stage. Burn slowly. Gradually increase the flame. Electric oven for 3 days, using 63.5 volts. Use the 1st level voltage to send power. Gradually increase the voltage to increase the load until it changes to normal smelting voltage on the fourth day.

[0066] 4. Maintenance ...

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Abstract

The invention belongs to a manganese-rich slag electric furnace and in particular relates to a manganese-rich slag electric furnace with a condensation furnace liner, which solves the problems that a furnace liner of the prior manganese-rich slag electric furnace is easy to erode seriously, has short service life, causes frequent maintenance of the electric furnace, and seriously influences production. In the manganese-rich slag electric furnace with the condensation furnace liner, the condensation furnace liner comprises a hearth bricking layer and a furnace wall bricking layer; the hearth bricking layer consists of a bottom primary layer insulation material, a bottom secondary layer insulation material, an insulation material for a fusion region of the electric furnace and a hearth protection layer from bottom to top; and the furnace wall bricking layer consists of an outer layer corhart clinging to a steel plate ring of the furnace wall, an inner layer corhart and a furnace wall protection layer from outside to inside. The manganese-rich slag electric furnace has the advantage that the service cycle of the furnace liner reaches over 5 years, thereby reducing the maintenance probability and maintenance cost of the electric furnace.

Description

technical field [0001] The invention belongs to a manganese-rich slag electric furnace, in particular to a manganese-rich slag electric furnace equipped with a condensation furnace lining. Background technique [0002] The traditional manganese-rich slag electric furnace lining uses the concept of heat preservation and heat insulation. The requirements for the refractory materials used in the furnace lining are: high refractoriness, no major changes in shape and volume at high temperatures; high mechanical strength at high temperatures ; Good slag resistance, good chemical stability at high temperature; low thermal conductivity (heat insulation, heat preservation); good oxidation resistance at high temperature, etc. [0003] The specific structure of the existing manganese-rich slag electric furnace lining is shown in Figure 1 (taking 18000KVA electric furnace as an example): Furnace bottom masonry: Furnace bottom is close to the steel plate to lay a layer of asbestos board ...

Claims

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Application Information

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IPC IPC(8): F27D1/10
Inventor 康国柱杜永慧贾宝志贾宝钢褚振权
Owner JIAOCHENG YIWANG FERROALLOY
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