Method for preparing sinter by adding chromite into high-chromium type vanadium titano-magnetite

A technology of vanadium-titanium magnetite and chromite, which is applied in the field of ironmaking raw materials, can solve problems such as low yield, poor granulation performance, and high technical difficulty, so as to improve air permeability and firing rate, and reduce gas consumption. cost, liquidity-enhancing effect

Inactive Publication Date: 2018-04-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When Panxi Hongge high-chromium vanadium-titanium magnetite is prepared by using the existing technology and sintered ore is added, the granulation performance is poor, the particle size of the sintered material is easily bonded into large balls, the gas permeability of the sintered material layer is poor, and it is easy to segregate during the sintering process. , lower yield
Therefore, it is very difficult to prepare high-chromium vanadium-titanium magnetite with chromite to produce sinter by using the existing technology

Method used

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  • Method for preparing sinter by adding chromite into high-chromium type vanadium titano-magnetite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing sintered ore by adding chromite to high-chromium vanadium-titanium magnetite, such as figure 1 As shown, the method includes the following steps:

[0049] 1. Mixing

[0050] The first stage: The sintering materials are 75kg of high-chromium vanadium-titanium magnetite, 2kg of chromite, 15kg of lime powder, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, and 5kg of returned ore. kg, coke and pulverized coal are used to adjust the amount of carbon, the amount of coke is 1kg, and the amount of pulverized coal is 1kg. Weigh the raw materials according to the above batching, put them into the mixer for ore mixing, utilize a sprayer to spray mist water in the mixture during the mixing process, and the amount of sprayed water accounts for 5.5% of the total weight of the above raw materials. Time 8min;

[0051] The second stage: Cover the mixer and stew for 10 minutes. After the stew is over, continue to mix for 10 minutes.

[0052] ...

Embodiment 2

[0069] A method for preparing sintered ore by adding chromite to high chromium type vanadium-titanium magnetite, the present embodiment is based on embodiment 1, and the specific operation steps are as follows:

[0070] 1. Mixing

[0071] The materials used for sintering are 55kg of high chromium vanadium-titanium magnetite, 15kg of chromite, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, 15kg of returned ore, 10kg of lime powder, 2kg of coke, and 2kg of pulverized coal. Weigh the raw materials according to the above ingredients, put them into the mixer for ore mixing, during the mixing process, spray mist water to account for 6.2% of the total weight of the raw materials, the mixing time is 12 minutes, and the mixer is covered and stewed for 10 minutes. Continue mixing for 12 minutes.

[0072] 2. Granulation

[0073] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to account fo...

Embodiment 3

[0089] This embodiment is on the basis of embodiment 1, concrete operation is as follows:

[0090] 1. Mixing

[0091] The materials used for sintering are 60kg of red grid high-chromium vanadium-titanium magnetite, 12kg of chromite, 0.5kg of blast furnace dust, 0.5kg of magnetic separation powder, 10kg of returned ore, 12kg of lime powder, 2.5kg of coke, and 2.5kg of coal powder. . Weigh the raw materials according to the above ingredients, put them into the mixer and mix them. During the mixing process, spray mist water to account for 7.4% of the total weight of the raw materials. The mixing time is 15 minutes. The mixer is covered and stewed for 10 minutes. Continue mixing for 13 minutes.

[0092] 2. Granulation

[0093] Pour the mixed raw materials into a cylinder granulator to start granulation. During the granulation process, spray mist water to account for 2.6% of the total weight of the raw materials, and granulate for 15 minutes.

[0094] 3. Discharge

[0095] Aft...

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Abstract

The invention relates to a method for preparing sinter by adding chromite into high-chromium type vanadium titano-magnetite. The method comprises the steps that the high-chromium type vanadium titano-magnetite, the chromite and other sintering materials are subjected to material mixing, material braising, material mixing, pelletizing, material distributing, igniting, sintering, crushing and screening, and the high-chromium type vanadium-titanium sinter is obtained. According to the method, the problem that material mixing is not even is effectively solved, the air permeability and the sintering rate of a sintered material in the sintering process are effectively increased, the situation that the sintering rate is decreased due to the fact that pellet materials with the grain sizes being large cannot be sintered thoroughly and completely is avoided, the production cost is effectively reduced, energy sources are saved, the sintering rate is further improved, and the yield is high. The prepared sinter has good air permeability in a softening-melting and dropping belt, the molten dropping performance is good, the yield is high, good metallurgical performance is achieved, and compared with the prior art, the recovery rates of Fe and Cr are increased greatly; and the method provides a theoretical foundation and a technological base for reasonably utilizing the Hongge vanadium titano-magnetite and the sinter prepared by adding the chromite into the high-chromium type vanadium titano-magnetite.

Description

technical field [0001] The invention belongs to the production technology of ironmaking raw materials, and in particular relates to a method for preparing sintered ore by adding chromite to high-chromium vanadium-titanium magnetite. Background technique [0002] Sichuan Panzhihua Hongge Mine is a reserve resource of inland iron and steel. It is a high-chromium and high-titanium vanadium-titanium magnetite with reserves of 3.55 billion tons. Because it is an iron resource and associated with more than ten kinds of available metal elements, especially iron, titanium, vanadium, chromium, etc., and the rich chromium resources can be used to produce high-end materials such as ferrochromium, metal chromium, and stainless steel, which are widely used in Metallurgical industry, chemical industry and national defense industry, etc. This has practical significance for reducing the high cost of China's annual import of chromium. However, chromite resources are mainly used as raw mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/22C22B1/24C22B1/00
CPCC22B1/22C22B1/00C22B1/24
Inventor 薛向欣汤卫东杨松陶杨合程功金高子先张立恒
Owner NORTHEASTERN UNIV
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