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Stemming

A technology of gun mud and partial clay, which is applied in the field of gun mud and preparation, which can solve the problems of affecting the stable tapping of the tap hole, difficulties in production planning, rocket injection, etc., and achieve the effect of saving costs and improving the instability of molten iron

Inactive Publication Date: 2016-02-17
山国强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when smelting some special iron ores, such as iron ores with high vanadium and titanium content, because the melting point of vanadium and titanium oxides is very high, which is higher than the iron tapping temperature, the iron cannot be melted during tapping, and will be deposited on the tap. The tap hole will lead to thicker and thicker knots, which will cause the hole diameter of the tap hole to change; under high temperature, the tap hole cannot be dealt with in time. stable, it is very easy to cause molten iron to run in a large flow and spray rockets, which brings difficulties to arrange the production plan of blast furnace for normal tapping

Method used

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  • Stemming

Examples

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Embodiment 1

[0011] Embodiment 1: a kind of clay for blast furnace of 450m3 is characterized in that described medium-sized blast furnace ironmaking special clay is made up of the following components by weight: 3-1mm chromium nitride: 20 parts; 1-0mm Sialon : 8 parts; 1-0mm sericite: 15 parts; 0.5-0mm magnesia iron oxide: 15 parts; partial clay powder: 9 parts; cobalt aluminum oxide powder 3 parts, cutting powder: 5 parts; flake graphite powder: 14 parts, 10 parts of composite charcoal powder, 1 part of medium temperature asphalt powder; the preparation method of gun mud: put the above raw materials into the mixer and pre-mix for 15 minutes; prepare 13 parts of modified tar, first add 85 parts of the total amount of modified tar %, wet milling for 35 minutes; add the remaining 15% modified tar, and then wet milling for 15 minutes; slice through a gun mud slicer, and then be formed by squeezing the mud, and cool to room temperature after cutting and segmenting, the mud squeezing in this ste...

Embodiment 2

[0012] Embodiment 2: a kind of clay for blast furnace of 600m3 is characterized in that said special clay for ironmaking of medium-sized blast furnace is composed of the following components by weight: 3-1mm chromium nitride: 19 parts; 1-0mm sialon : 7 parts; 1-0mm sericite: 14 parts; 0.5-0mm magnesia iron oxide: 15 parts; partial clay powder: 10 parts; cobalt aluminum oxide powder: 5 parts, cutting powder: 5 parts; flake graphite powder: 18 parts, Composite charcoal powder 6 parts, medium temperature asphalt powder: 1 part. The preparation method of gun mud: Put all the raw materials into the mixer and pre-mix for 15 minutes; prepare 14 parts of modified tar, first add 85% of the total amount of modified tar, wet mill for 35 minutes; add the remaining 15% Modified tar, then wet milled for 15 minutes; sliced ​​by a mud slicer, and then passed through a mud extruder, extruded to form, cut into sections and cooled to room temperature, and the extruded temperature in this step wa...

Embodiment 3

[0013] Embodiment 3: a kind of clay for 800m3 blast furnace, it is characterized in that described medium-sized blast furnace ironmaking special clay is made up of the following components by weight: 3-1mm chromium nitride: 20 parts; 1-0mm sialon : 6 parts; 1-0mm sericite: 14 parts; 0.5-0mm magnesia iron oxide: 13 parts; partial clay powder: 10 parts; cobalt aluminum oxide powder: 5 parts, cutting powder: 5 parts; flake graphite powder: 20 parts, Composite carbon powder 5 parts, strontium carbonate 1 part, medium temperature asphalt powder: 1 part. The preparation method of gun mud: put all the raw materials into the mixer and pre-mix for 15 minutes; prepare 15 parts of modified tar, first add 85% of the total amount of modified tar, and wet mill for 35 minutes; add the remaining 15% to modify tar, and then wet milled for 15 minutes; sliced ​​by a gun mud slicer, and then passed through a mud extruder, extruded into shape, cut into sections and cooled to room temperature, and ...

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Abstract

The invention discloses stemming special for medium-sized blast furnace iron making. The stemming is characterized by being prepared from, by weight, 15-20 parts of chromium nitride with granularity of 1-3 mm, 5-8 parts of Theron with granularity of 0-1 mm, 10-15 parts of sericite with granularity of 0-1 mm, 8-15 parts of magnesium oxide iron with granularity of 0-0.5 mm, 8-13 parts of partial clay powder, 3-7 parts of cobaltous oxide alumina, 5-10 parts of cutting powder, 7-25 parts of crystalline graphite powder, 5-10 parts of composite powdered carbon, 0-1 part of strontium carbonate and 1-2 parts of medium-temperature asphalt powder. The aperture of an iron outlet can be kept stable and unchanged and iron discharge can be kept stable through the stemming; in addition, in the long-term storage process, the use performance and operation performance of the stemming are not decreased.

Description

technical field [0001] The invention belongs to the field of refractory plastics specially used for blast furnace ironmaking, and in particular relates to a blast furnace clay and a preparation method thereof. Background technique [0002] The blast furnace is the main equipment for smelting molten iron. After the blast furnace smelts iron, the molten iron needs to be released through the blast furnace taphole. In order to ensure continuous smelting, the taphole must be blocked. The material that blocks the taphole is called gun mud. . At present, when smelting some special iron ores, such as iron ores with high vanadium and titanium content, because the melting point of vanadium and titanium oxides is very high, which is higher than the tapping temperature, the iron cannot be melted during tapping, and will be deposited on the tapping surface. The tap hole, resulting in thicker knots, resulting in changes in the hole diameter of the tap hole; generally, the tap hole cannot...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 山国强
Owner 山国强
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