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Blast furnace injection fuel and preparation method thereof

A fuel and blast furnace technology, applied in blast furnaces, fuels, solid fuels, etc., can solve problems such as environmental pollution and energy waste in sintering systems, and achieve the effect of reducing production costs

Inactive Publication Date: 2019-02-01
BENGANG STEEL PLATES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above technical problems, the object of the present invention is to provide a blast furnace injection fuel and its preparation method to reduce the cost of blast furnace smelting and solve the problem of energy waste and environmental pollution in the sintering system

Method used

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  • Blast furnace injection fuel and preparation method thereof

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Embodiment Construction

[0017] With the continuous expansion of the production scale of blast furnace ironmaking and the increasing demand for pig iron, the demand for fuel in blast furnace ironmaking is also increasing. Due to the serious environmental pollution of coke produced by coke ovens and the decreasing reserves of coking coal, resulting in The supply of metallurgical coke is becoming increasingly tight, and people seek new fuels to replace part of the coke. The use of fuel injection in blast furnaces has become a means of saving coke and strengthening smelting in blast furnaces. The fuel that can be injected into the blast furnace is divided into three categories: liquid fuel, such as heavy oil, tar, etc.; solid fuel, such as anthracite, bituminous coal, lignite, etc.; gaseous fuel, such as natural gas, coke oven gas, etc. The choice of injection fuel depends on the conditions of fuel resources in various countries, and changes with the change of resource conditions. With the gradual impro...

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Abstract

The invention relates to a blast furnace injection fuel, which comprises, by mass, 65-70% of anthracite, 20% of bituminous coal, and 5-15% of dust removing ash. In the prior art, the price of the coalpowder is continuously increased along with the gradual improvement of the domestic steel market. In order to reduce the cost of blast furnace ironmaking, the blast furnace injection fuel of the present invention is added with the coking plant dust removing ash to replace part of the coal powder, wherein the calorific value of the dust removing ash is similar to the calorific value of the anthracite powder so as to achieve equivalent replacement. According to the present invention, with the blast furnace injection fuel, the production cost of the overall ironmaking system is reduced, and theenergy waste problem and the environment pollution problem of the sintering system are solved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace smelting, and relates to a blast furnace injection fuel and a preparation method thereof. Background technique [0002] On the one hand, as the price of domestic pulverized coal rises, the smelting cost of the blast furnace system also continues to rise. On the other hand, dust from coking plants is used as waste. Due to environmental protection reasons, it has to be added to sintering ore. It adopts the ventilation type sintering technology. Since the dedusting ash is powdery, a large amount of dust is raised during the batching and sintering process, and after the dedusting ash enters the sintering machine with the batching, the particle size of the dedusting ash is small because the material contains moisture. , together with the water is sucked away by the airflow, the energy utilization rate is low, which causes a waste of energy, and at the same time, a large amount of water-containing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/02C21B5/00
CPCC10L5/02C21B5/003
Inventor 张军耿君臣
Owner BENGANG STEEL PLATES
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