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High-chromium high-titanium solvent pellet as well as preparation method and application thereof

A high-chromium and high-titanium technology, applied in the field of ironmaking, can solve the problems of low ironmaking output, achieve the effects of increasing blast furnace output, high compressive strength, and improving the gas permeability of furnace charge

Inactive Publication Date: 2018-11-06
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing high-chromium and high-titanium solvent-based pellets, aiming to improve the problem of low output of high-chromium and high-titanium concentrates directly used in blast furnace ironmaking

Method used

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  • High-chromium high-titanium solvent pellet as well as preparation method and application thereof
  • High-chromium high-titanium solvent pellet as well as preparation method and application thereof
  • High-chromium high-titanium solvent pellet as well as preparation method and application thereof

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preparation example Construction

[0018] A preparation method of high chromium and high titanium solvent-based pellets, comprising the steps of:

[0019] S1. Mix the manufacturing raw materials evenly to obtain a mixed pelletizing material. The manufacturing raw materials include 95-98.4.4 parts of high-chromium and high-titanium concentrate, 1.6-3 parts of active lime and 1.5-2.3 parts of bentonite in parts by weight.

[0020] Specifically, high chromium and high titanium concentrate and active lime are used as raw materials for production. First, put the high-chromium and high-titanium concentrate transported back from the mining area to dry in an oven at a drying temperature of 200-300°C for 1.5-2.3 hours, so that the moisture content of the high-chromium and high-titanium concentrate is below 2%. The main purpose of drying the high-chromium and high-titanium concentrate is to avoid the uneven composition and caking phenomenon caused by the direct digestion of the subsequently dried active lime when it is m...

Embodiment 1

[0034] This embodiment provides a method for preparing high-chromium-high-titanium solvent-based pellets and the high-chromium-high-titanium solvent-based pellets prepared by the method.

[0035] A method for preparing high-chromium and high-titanium solvent-based pellets, the preparation steps comprising:

[0036] Put the high-chromium and high-titanium concentrate transported back from the mining area in an oven, and bake it for 1.5 hours at a temperature of 200° C., so that the moisture content of the high-chromium and high-titanium concentrate is below 2%. Then take 160kg of active lime, 9840kg of high-chromium and high-titanium concentrate after drying, and 150kg of bentonite for subsequent use.

[0037] Grind the high-chromium and high-titanium concentrate until the particle size is below 0.109mm and the particles with a particle size below 0.075mm account for 75% of the total weight of the powdery high-chromium and high-titanium concentrate; grind the active lime to the...

Embodiment 2

[0041] This embodiment provides a method for preparing high-chromium-high-titanium solvent-based pellets and the high-chromium-high-titanium solvent-based pellets prepared by the method.

[0042] A method for preparing high-chromium and high-titanium solvent-based pellets, the preparation steps comprising:

[0043] The high-chromium and high-titanium concentrate transported back from the mining area is placed in an oven, and baked at a temperature of 300°C for 2.5 hours, so that the moisture content of the high-chromium and high-titanium concentrate is below 2%. Then take 180kg of active lime, 9770kg of dried high-chromium and high-titanium concentrate and 150kg of bentonite for subsequent use.

[0044]Grind the high-chromium and high-titanium concentrate until the particle size is below 0.109mm and the particles with a particle size below 0.075mm account for 85% of the total weight of the powdery high-chromium and high-titanium concentrate; grind the active lime to the partic...

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Abstract

The invention relates to the technical field of iron making and provides a preparation method of a high-chromium high-titanium solvent pellet. The preparation method of the high-chromium high-titaniumsolvent pellet comprises the following steps: mixing preparation raw materials uniformly to obtain a mixed pelletizing material, wherein the preparation raw materials comprise 95 to 98.4 parts by weight of high-chromium high-titanium concentrate, 1.6 to 3 parts by weight of active lime and 1.5 to 2.3 parts by weight of bentonite; preparing a fresh pellet with the aggregate size of 8 to 16 mm andthe water content of 8 to 9 percent by using the mixed pelletizing material; and drying the fresh pellet to obtain the high-chromium high-titanium solvent pellet. By the method, the problem of low yield caused by the fact that the high-chromium high-titanium concentrate is directly applied to blast furnace iron making can be alleviated. The invention also provides the high-chromium high-titanium solvent pellet. The high-chromium high-titanium solvent pellet is prepared by the preparation method of the high-chromium high-titanium solvent pellet. The pellet has high compressive strength, and theyield is high when the pellet is applied to blast furnace iron making. The invention also provides application of the high-chromium high-titanium solvent pellet serving as the raw material to iron making.

Description

technical field [0001] The invention relates to the technical field of ironmaking, in particular to a preparation method and application of a high-chromium-high-titanium solvent-based pellet. Background technique [0002] There are many kinds of iron minerals, and more than 300 kinds of iron minerals and iron-containing minerals have been discovered. The iron products we need to use in our production and life are all obtained through iron ore processing and smelting. The use of iron can be said to be extremely important to our production and life. [0003] my country is rich in high-chromium and high-titanium concentrates, but the iron ore directly used in blast furnaces has a low yield. [0004] In view of this, the present application is proposed. Contents of the invention [0005] The invention provides a method for preparing high-chromium and high-titanium solvent-based pellets, aiming at improving the problem of low output of high-chromium and high-titanium concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243
CPCC22B1/243C22B1/2406
Inventor 胡鹏饶家庭唐文博王禹键
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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