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Blast furnace coal injection accelerant as well as preparation method and application thereof

A technology of blast furnace coal injection and combustion-supporting agent, applied in blast furnace, blast furnace details, furnace and other directions, can solve the problems of high cost of combustion-supporting agent and high production cost, and achieve the effects of protecting the environment, easy to obtain materials, and increasing output

Active Publication Date: 2013-12-18
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a combustion enhancer to pulverized coal injection to increase the combustion rate of pulverized coal, reduce the amount of unburned pulverized coal, greatly increase the coal injection ratio, and reduce the coke ratio are technical means widely adopted by the ironmaking industry in recent years, but most of them The core technologies of combustion enhancers are all in the hands of private or private enterprise owners. Although the combustion enhancer can reduce the coke ratio and save the cost of pig iron, the cost of adding the combustion enhancer is relatively high (5400-6500 yuan / ton, mainly Some high-priced raw materials (such as rare earth elements, etc.) are used, which makes the production cost of enterprises in the ironmaking industry higher

Method used

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  • Blast furnace coal injection accelerant as well as preparation method and application thereof

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preparation example Construction

[0016] The preparation method of blast furnace coal-injection combustion-supporting agent of the present invention comprises pretreatment, preparation steps, specifically comprises:

[0017] A. Pre-treatment: Prepare materials according to the formula of the combustion aid, and crush the roasted siderite and lightly burned dolomite for later use;

[0018] B. Preparation: weigh the pulverized roasted siderite, lightly burned dolomite and dust-removed fine ash according to the formula ratio, mix and stir evenly to obtain the target product.

[0019] The roasting of the siderite is to put the siderite into a roasting furnace at 900-1100°C and roast for more than 420 minutes until the loss rate of the siderite is less than 1%.

[0020] The lightly burned dolomite is put into a 900-1000° C. calcination furnace to calcine the dolomite for more than 360 minutes until the loss rate of the dolomite is less than 1%.

[0021] The particle size of the pulverization described in step A is...

Embodiment 1

[0034] Prepare the materials according to the formula of the combustion aid, crush the roasted siderite and light-burned dolomite for later use, put 100 Kg of roasted siderite, 100 Kg of light-burned dolomite, 100 Kg of dust removal coarse ash in thermal power plants, and Weigh 100Kg of factory dedusting fine ash and 100Kg of sintering head dedusting ash, mix and stir evenly to obtain the target object.

Embodiment 2

[0036] Prepare materials according to the formula of combustion aid, crush roasted siderite and light-burned dolomite for later use, weigh 100Kg of roasted siderite, 100Kg of light-burned dolomite and 300Kg of dedusting ash after crushing, mix and stir evenly to obtain the target thing.

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Abstract

The invention claims a blast furnace coal injection accelerant as well as a preparation method and application thereof. The blast furnace coal injection accelerant is composed of 0-100wt% of roasting siderite, 0-100wt% of light burned dolomite and 0-100wt% of fly ash, and the weight percentage of the above compositions totals 100%. The preparation method comprises pretreatment and preparation steps, and comprises the following specific steps: preparing the material based on the formula of the accelerant, weighing the pulverized roasting siderite, light burned dolomite and the fly ash based on the formula proportions, and mixing and stirring the compound uniformly to obtain the target accelerant. The application of the blast furnace coal injection accelerant is as follows: applying the blast furnace coal injection accelerant to the blast furnace anthracite or mixed pulverized coal injection. According to the preparation method, the invention adopts calcium-based, magnesium-based, ferrum-based and partial modified substances are adopted as the main components of the accelerant, so that the accelerant has the advantages of easily available material, low cost and effects of well reducing the coke ratio, stabilizing furnace conditions and increasing the yield; according to the method, the partial industrial wastes are used as the raw materials, so that the method has the functions of protecting the environment and recycling resources.

Description

technical field [0001] The invention belongs to the technical field of energy saving, and in particular relates to a combustion aid for blast furnace coal injection and its preparation method and application. Background technique [0002] There are many combustion aids, such as oxygen, potassium chlorate, potassium nitrate, etc. Water is a combustion-supporting agent. Water is composed of H and O. Hydrogen and oxygen are extremely flammable when mixed within their explosive limits. Oxygen is a combustion-supporting substance. Under certain conditions, water can be decomposed into hydrogen and oxygen. , so that water is a combustion accelerant under these conditions. Industrial-grade combustion enhancer: Industrial-grade combustion enhancer is developed to reduce energy consumption and reduce operating costs. The purpose is to save energy and reduce consumption. Combustion accelerant: Appearance is white, pink powder. There are also granular white granules. Adding a combu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00C10L9/10
Inventor 唐启荣申波杨杰康
Owner WUKUN STEEL
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