Preparation method of carbon-iron composite furnace burden

A furnace charge and carbon iron technology, which is applied in the preparation field of carbon-iron composite charge, can solve the problems of difficult control of the atmosphere in the furnace, poor material strength, and low efficiency, so as to solve the problem of batch production, avoid mutual extrusion and friction, reduce The effect of coking coal consumption

Inactive Publication Date: 2020-11-17
BAOSHAN IRON & STEEL CO LTD
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents such as publication numbers CN106048114A, CN104119939A, and CN106635067A all propose production methods and carbonization methods for iron coke, but their iron coke production methods are all hot-pressed methods, and the hot-pressed iron coke is carbonized in a shaft furnace Method, shaft furnace carbonization is divided into internal heat type carbonization and external heat type carbonization, external heat type carbonization belongs to indirect heat transfer, low efficiency and low production capacity, while internal heat type carbonization is easy to cause melting loss of materials due to direct contact between gas and materials As a result, the strength of the material is very poor, and the atmosphere in the furnace is difficult to control during the heating of the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of carbon-iron composite furnace burden

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] Please combine figure 1 Shown, the preparation method of a kind of carbon-iron composite charge provided by the present invention comprises the following steps:

[0029] 1) Dry precipitation, put the iron ore powder into a drying box for ventilating and drying treatment, and the dried iron ore powder requires a moisture content of less than 1%, so as to facilitate the screening of the iron ore powder.

[0030] 2) Screening, the content of iron ore powder is 0.4-0.5% CaO, 61-66% TFe, 0.4-0.5% MgO, 4-5% SiO 2 , the iron ore powder obtained in step 1) is sieved by a round-hole sieve, and the undersize iron ore powder with a particle size of less than 0.1mm is used as a material to remove the oversize of large particles, which is beneficial to the iron ore powder in the foundation Cooperate with coal and disperse evenly to ensure the quality of carbon-iron composite charge.

[0031] 3) crushing and mixing, the content of basic blending coal is 5-9% A d , 15-20% of VM d ...

Embodiment 1

[0036] Dry the iron ore powder from the production plant. After drying, the moisture content of the iron ore powder is less than 1%. After drying, it is screened with a round hole sieve. The main substances in the iron ore powder are CaO (0.4%), TFe ( 61%), MgO (0.4%), SiO 2 (4%), and the iron ore powder whose undersize particle size is less than 0.1mm is used as the used material. The basic blending coal (A d = 9%, VMd =15%) into the crusher for mechanical crushing, the particle size after crushing is less than 3mm, and finally the processed iron ore powder is stirred and mixed with the crushed basic coal and binder from the production plant. The use of iron ore powder The dosage is 10%, the usage amount of the basic blended coal is 90%, and the usage amount of the additional binder is 4% of the mixture of the iron ore powder and the basic blended coal. Put the mixed material into the double roller briquetting machine and press it into a pillow-shaped material at a pressure...

Embodiment 2

[0038] Dry the iron ore powder from the production plant. After drying, the moisture content of the iron ore powder is less than 1%. After drying, it is screened with a round hole sieve. The main substances in the iron ore powder are CaO (0.45%), TFe ( 63%), MgO (0.45%), SiO 2 (5%), and the iron ore powder whose undersize particle size is less than 0.1mm is used as the use material. The basic blending coal (A d = 8%, VM d =16%) into the crusher for mechanical crushing, the particle size after crushing is less than 3mm, and finally the processed iron ore powder is stirred and mixed with the crushed basic coal and binder from the production plant. The use of iron ore powder The dosage is 20%, the usage amount of the basic blended coal is 80%, and the usage amount of the additional binder is 5% of the mixture of the iron ore powder and the basic blended coal. Put the mixed material into the double roller briquetting machine and press it into a pillow-shaped material at a press...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a carbon-iron composite furnace burden. The preparation method of the carbon-iron composite furnace burden comprises the following steps of 1) drying and dewatering: putting iron ore powder into a drying box for carrying out aeration-drying treatment; 2) screening: screening the iron ore powder obtained in the step 1) by using a round hole screen soas to obtain small-particle iron ore powder meeting the requirements; 3) crushing and mixing: adding basic blended coal into a crusher for carrying out mechanical crushing, and then adding a binder into the basic blended coal and the iron ore powder obtained in the step 2) for stirring and mixing to obtain a mixed material; (4) preparing a product: adding the mixed material into a double-roller ball press machine, pressing into pillow-shaped materials, continuously feeding in a double-roller ball press process, and continuously discharging; and (5) carbonizing the materials: putting the pressed materials into a material tank, then putting the material tank into a microwave heating furnace for static heating of the materials, and adding the materials into nitrogen for cooling after the materials are taken out of the furnace. According to the preparation method of the carbon-iron composite furnace burden provided by the invention, the problem that the iron ore powder can only be used forsintering and pelletizing is solved, and meanwhile, a new proper raw material is found for preparing the high-reactivity carbon-iron composite furnace burden.

Description

technical field [0001] The invention relates to a raw material for blast furnace ironmaking, and more specifically relates to a preparation method of a carbon-iron composite charge. Background technique [0002] In recent years, environmental problems such as global warming have become increasingly severe, and CO 2 Emission reduction has become a common challenge faced by mankind. On December 12, 2015, the United Nations Climate Change Conference in Paris successfully passed the Paris Agreement. At the Paris conference, the Chinese government promised to reduce the CO2 around 2030 2 Emissions peak and achieve CO per unit of GDP 2 Emissions will drop by 60% to 65% compared with 2005. Due to the steel industry CO 2 Emissions accounted for CO 2 15% of the total emissions, iron and steel enterprises will bear huge carbon emission reduction pressure for a long time. For a long period of time now and even in the future, the blast furnace-converter process is still the main ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): C21B5/00C22B1/244
CPCC21B5/007C21B5/008C22B1/2406C22B1/244
Inventor王玉明钱晖毛晓明胡德生
OwnerBAOSHAN IRON & STEEL CO LTD