Stepped furnace

A ladder furnace and ladder technology, which is applied in furnaces, vertical furnaces, furnace types, etc., can solve problems such as difficulty in practical implementation, and no electric heating and hybrid heating are involved.

Inactive Publication Date: 2011-07-27
蒋明学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, in the case of the material column as a whole moving object, the effect of these improvements can only be partial, and it is also difficult to implement in practice
The current shaft kiln has no electric heating method at all, and even various new shaft kilns, including the applicant's stepped clinker firing furnace, do not involve electric heating and mixed heating technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment one: lightly burned magnesia, calcium oxide, dolomite etc.

[0041] The magnesite, limestone, dolomite, and brucite mined from the mine are washed and calcined in a kiln to 900-1000°C. After a certain period of calcination, the ore is decomposed to produce carbon dioxide gas, and the light calcined product with high activity is obtained. Magnesium oxide, lime and dolomite are important auxiliary materials for building materials, metallurgy and chemical industry. In actual processing, ore lumps should be crushed to below the actual required particle size range, and then crushed without calcination. If fine particles are actually required, the ore should be crushed directly into fine particles, so that the operation in the stepped furnace will be more stable. .

[0042] To calcinate these raw materials in a stepped furnace, first purchase enough light sintered materials (M 1 ) is added to the upper silo (1) with one of the aforementioned various transportatio...

Embodiment 2

[0047] Embodiment 2: sintered alumina, magnesia, mullite, spinel, tabular alumina, magnesia dolomite, etc.

[0048] These clinkers are important refractory raw materials. With the progress of the refractory industry and the change of resources, the firing of clinker has gradually changed from the original natural block material into the furnace for calcination to the crushing of ore into fine powder and calcination of the ball into the furnace. , this method is also the shape of the burden that the ladder furnace operates stably and is easy to control. Of course, the process of pressing balls is mainly for various synthesis and homogenization purposes, and also to improve the grade of clinker and the utilization rate of resources. For step furnace sintering, it is necessary to properly add binder to the pressure balls to increase the strength of the balls, because in the step furnace, the pressure balls are constantly rolling and freely falling downward, and the collision betw...

Embodiment 3

[0053] Embodiment three: sintered cement clinker, alumina clinker

[0054] Cement clinker and alumina clinker are in great demand in the national economy, and my country has become a major producer of cement and alumina. Due to the poor quality of clinker fired in traditional vertical kilns, the country has not allowed vertical kilns to produce cement clinker. However, the economic and cost advantages of shaft kilns still exist, and people have not given up the exploration of shaft kilns that can produce high-quality clinker, and the ladder furnace should be one of them.

[0055] In the rotary kiln, the cement material (pellet material or pre-decomposed powder aggregate particles) is piled up along one side of the wall of the rotary drum, and when it reaches a certain height, it rolls down due to the action of gravity, so that the material continues to rise on the material slope. Roll back and forth, and due to the inclination of the drum, it will advance a certain distance i...

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PUM

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Abstract

The invention provides a vertical kiln that is used for treatment on solid material, such as combination reaction, decomposition reaction, reaction between the solid material and gas, and sintering and compacting of the solid material or melting of the solid material into high-temperature liquid. The stepped furnace consists of an upper silo, a feeding mechanism, a step furnace, step plates, a bottom silo and a discharging mechanism; furthermore, a gas inlet and a gas outlet are arranged at the lower parts of the bottom silo and the top silo; the step plates in the stepped furnace can be staggered mutually in horizontal direction so that the step root is always connected with two furnace walls that are arranged in parallel and the step edge is always away from the two furnace walls by a certain distance; the step plates are away from one another by a certain distance in vertical direction; furthermore, the vertical distance from the step edge to the next step surface can meet the flowing of the material and can also have certain free space height. The vertical kiln can replace vertical reaction towers, vertical thermal decomposition furnaces, light-burning furnaces, clinker sintering furnaces, melting furnaces and special metallurgical smelting furnaces. Compared with the traditional vertical kiln, the vertical kiln in the invention has the characteristics of good material processing quality, high uniformity, and good energy-saving and consumption-reducing effect, and having no pollution to environment.

Description

Technical field: [0001] The invention relates to the treatment of solid materials, including completing the compounding and decomposition reactions between solid materials, the reaction between solid materials and gas, and sintering and compacting the solid materials or melting them into high-temperature liquids. technical background: [0002] At present, a variety of professional engineering equipment is required to complete the above tasks, such as: (1) chemical reaction tower, (2) certain materials such as dolomite, magnesite, calcium carbonate, clay ore, diaspore, siderite, etc. Hydroxide and salt decomposition furnace or light sintering furnace or conversion furnace, (3) Clinker sintering furnace for sintering and compacting certain materials such as high-alumina bauxite ore, clay ore, cement raw materials, and iron ore pellets, (4) and melting furnaces for melting certain materials such as silica (glass raw material), ceramic pigments and glazes, garbage, etc. (5) melt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B1/04F27B1/10
Inventor 蒋明学
Owner 蒋明学
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