Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore

A high-titanium slag and ferrotitanium technology, applied in fluidized bed furnaces, furnaces, furnace types, etc., can solve the problems of low production efficiency, complex process, high cost, etc., and achieve fast reduction speed, complex solution process, and recovery rate. high effect

Inactive Publication Date: 2017-03-22
CHONGQING UNIV
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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a low-energy, high-efficiency low-temperature reduction and separation method for preparing high-titanium slag from titanium-containing iron ore, so as to solve the problem of preparing high-titanium slag in the existing electric furnace smelting process. Existing problems such as complex process, low production efficiency, high cost, and large energy consumption

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  • Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore
  • Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore
  • Method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore

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example 1

[0049] This embodiment adopts TiO 2 Titanium concentrate with a mass percentage of 35% is used as the titanium-iron mineral raw material, graphite is used as the carbonaceous reducing agent, Na 2 SO 4 As a smelting reduction catalyst, high titanium slag is prepared by reducing according to the method of the present invention, and the specific steps are as follows:

[0050] 1) The ilmenite concentrate is crushed to obtain ilmenite-containing mineral powder for later use, and the particle size of the obtained ilmenite mineral powder is less than 100 mesh, accounting for 83% of the total weight.

[0051] 2) Put the titanium-iron mineral powder into a muffle furnace and oxidize it at 600° C. for 80 minutes to obtain the titanium-iron mineral powder oxide.

[0052] 3) Add graphite and Na to titanium-iron mineral powder oxide 2 SO 4 , wherein, after calculation, the ratio of the molar content of carbon in the added graphite to the molar content of oxygen in the iron oxide contai...

example 2

[0057] This embodiment adopts TiO 2 Ilmenite with a mass percentage content of 32% is used as the ilmenite-containing mineral raw material, coal dust is used as the carbonaceous reducing agent, and FeS is used as the smelting reduction catalyst. The high-titanium slag is prepared by reduction according to the method of the present invention. The specific steps are as follows:

[0058] 1) Crushing the ilmenite ore to obtain ilmenite-containing mineral powder for later use. Particles with a particle size of less than 100 mesh in the obtained ilmenite mineral powder account for 85% of the total weight.

[0059] 2) Put the titanium-iron mineral powder into a muffle furnace and oxidize it at 1100° C. for 20 minutes to obtain the titanium-iron mineral powder oxide.

[0060] 3) Add coal powder and FeS to the titanium-iron mineral powder oxide, wherein, after calculation, the molar content of carbon in the added coal powder is added to the oxygen in the iron oxide contained in the tit...

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Abstract

The invention provides a method for preparing high titanium slag through low temperature reduction and separation of titanium-containing iron ore. According to the method, a pre-oxidation titanium-containing iron ore raw material is used, and a carbonaceous reducing agent and smelting reduction catalysts such as Na2SO4 and FeS are used for reduction production of pig iron and high titanium slag products; compared with a traditional electric furnace smelting titanium slag process, a product can be obtained through reduction for 20 minutes to 40 minutes at a lower temperature ranging from 1200 DEG C to 1500 DEG C, the reduction speed is higher, energy consumption is lower, cost is reduced, and the aims of separating the pig iron and the titanium slag with high efficiency, low consumption and low cost are achieved; meanwhile, the metallization recovery rate of the iron element is improved, and the grade of the obtained high titanium slag is higher; in addition, the main ingredient of tail gas in the reduction process is CO and can be recycled, and the reduction and heating energy consumption is further saved; accordingly, a new process is provided for producing the high titanium slag, and the problems that in the prior art, a high titanium slag preparing process is complex, the production efficiency is low, cost is expensive, and the energy consumption is large are solved.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to a method for preparing high-titanium slag by reducing and separating titanium-containing iron minerals at low temperature. Background technique [0002] Titanium alloys are widely used in various fields because of their high strength, good corrosion resistance, and high heat resistance. Over the past few decades, countries around the world have devoted themselves to developing new low-cost titanium smelting processes. Ilmenite, which is abundant in reserves, is the main raw material for the production of titanium or titanium dioxide, but its grade is low, so it must first be enriched into a higher-grade titanium-rich material. It can be seen that the preparation of titanium-rich materials has become an important link in the production process of titanium industry. [0003] At present, in industrial production, the utilization of ilmenite mainly adopts e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B1/24C22B34/12C21B13/00
CPCC22B1/00C21B13/008C22B1/2406C22B34/1209
Inventor 吕学伟吕炜张颖异白晨光李生平胡凯范刚强
Owner CHONGQING UNIV
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