Iron-titanium composite coke for low-carbon ironmaking and manufacturing method of iron-titanium composite coke

A manufacturing method and iron-titanium technology, which are applied in the field of metallurgical coke preparation, can solve the problems of air permeability and liquid permeability of material columns that are difficult to play the role of coke skeleton, expensive organic additives, and increased coke ash content, etc., and achieve good air permeability and liquid permeability. , Improve energy efficiency, reduce the effect of coke ratio

Active Publication Date: 2022-06-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the addition of iron-containing substances improves the reactivity of coke, the strength of coke decreases sharply after the reaction, and it is difficult to play the skeleton role of coke in the blast furnace and maintain the gas and liquid permeability of the material column
Further addition of binder can optimize the strength of iron coke, but organic additives are expensive, and inorganic binders not only increase the ash content of coke, but also often contain alkali metal elements such as Na and K, which are not good for blast furnace smelting

Method used

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Effect test

Embodiment 1

[0063] The present embodiment adopts the above-mentioned manufacturing method of iron-titanium composite coke, which specifically includes the following steps:

[0064] Step 1: Select 4 groups of coking coal and 2 groups of 1 / 3 coking coal. The industrial analysis of each group of coal samples is shown in Table 1. The 6 groups of coal samples are respectively pre-screened, and the sieves are crushed in a crusher;

[0065] Step 2: After sieving the crushed coal samples again, the sieves are mixed by mass percentage to obtain the basic coal samples. between;

[0066] Step 3: The ilmenite concentrate is used as the iron-titanium additive. The chemical composition of the iron-titanium additive is shown in Table 3. The ilmenite concentrate is pre-screened to a particle size of less than 0.074 mm, and then the iron-titanium additive is mixed with the basic coal sample in step 2. The mixture is obtained by mixing in proportion, wherein the mass of the iron-titanium additive is 0;

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Embodiment 2

[0070] The present embodiment adopts the above-mentioned manufacturing method of iron-titanium composite coke, which specifically includes the following steps:

[0071] Step 1: Select 4 groups of coking coal and 2 groups of 1 / 3 coking coal. The industrial analysis of each group of coal samples is shown in Table 1. The 6 groups of coal samples are respectively pre-screened, and the sieves are crushed in a crusher;

[0072] Step 2: After sieving the crushed coal samples again, the sieves are mixed by mass percentage to obtain the basic coal samples. between;

[0073] Step 3: The ilmenite concentrate is used as the iron-titanium additive. The chemical composition of the iron-titanium additive is shown in Table 3. The ilmenite concentrate is pre-screened to a particle size of less than 0.074 mm, and then the iron-titanium additive is mixed with the basic coal sample in step 2. The mixture is obtained by mixing in proportion, wherein the mixing mass ratio of the iron-titanium addi...

Embodiment 3

[0077] The present embodiment adopts the above-mentioned manufacturing method of iron-titanium composite coke, which specifically includes the following steps:

[0078] Step 1: Select 4 groups of coking coal and 2 groups of 1 / 3 coking coal. The industrial analysis of each group of coal samples is shown in Table 1. The 6 groups of coal samples are respectively pre-screened, and the sieves are crushed in a crusher;

[0079] Step 2: After sieving the crushed coal samples again, the sieves are mixed by mass percentage to obtain the basic coal samples. between;

[0080] Step 3: The ilmenite concentrate is used as the iron-titanium additive. The chemical composition of the iron-titanium additive is shown in Table 3. The ilmenite concentrate is pre-screened to a particle size of less than 0.074 mm, and then the iron-titanium additive is mixed with the basic coal sample in step 2. The mixture is obtained by mixing in proportion, wherein the mixing mass ratio of the iron-titanium addi...

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Abstract

The invention discloses iron-titanium composite coke for low-carbon ironmaking and a manufacturing method thereof.The iron-titanium composite coke is obtained by mixing an iron-titanium additive and a basic coal sample according to the mass ratio of 0-0.2: 1 and conducting destructive distillation, and the manufacturing method comprises the following steps that 1, multiple sets of coal samples are pre-screened, and oversize products are crushed in a crusher; 2) screening multiple groups of crushed coal samples again, and mixing screen underflow according to the mass percentage to obtain a basic coal sample; 3) mixing the basic coal sample and the iron-titanium additive according to the mass percentage to obtain a mixture; 4) adjusting the mass percentage of water in the mixture, and loading the mixture into a coke oven carbonization chamber according to a preset bulk density to obtain a coal cake; 5, the coal cake in the carbonization chamber is heated and subjected to constant-temperature destructive distillation, and the iron-titanium composite coke is obtained.The iron-titanium composite coke manufactured through the method has the advantages of being high in reactivity and high in strength after reaction, the utilization efficiency of blast furnace gas can be improved, and high economic value and application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgical coke preparation, in particular to an iron-titanium composite coke for low-carbon ironmaking and a manufacturing method thereof. Background technique [0002] Coke is an extremely important raw fuel in the blast furnace ironmaking process. Due to the large output of pig iron in my country, the consumption of coke is also large. In 2021, China's pig iron output will be about 870 million tons, the blast furnace coke ratio will be about 300-400kg / tFe, and the coke consumption will exceed 300 million tons. The coking process has high energy consumption and large pollutant emissions, and by-produces a large amount of dust and CO 2 , SO 2 , NO x and other air pollutants and refractory phenol cyanide wastewater, tar residue. Under the situation of green and sustainable development, the iron and steel industry and its fuel supply coking industry urgently need to transform to an environment-frie...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C10B53/04C10B57/06C21B5/00
CPCC10B53/04C10B57/06C21B5/007Y02P10/20
Inventor张生富陈静波白晨光温良英尹铖魏志芳
OwnerCHONGQING UNIV