Technique for producing and reducing ilmenite in industrial microwave kiln

A technology of ilmenite and microwave, which is applied in furnaces, fluidized bed furnaces, furnace types, etc., can solve the problems of uneven heating of materials, unstable product quality, and high working power of kilns, so as to shorten the production cycle and improve the quality , The effect of high product yield

Inactive Publication Date: 2012-07-04
湖南阳东微波科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although adopting the existing rotary kiln to reduce ilmenite can improve the continuous performance of production to a certain extent, there are still two problems in the following aspects: first, the material is heated unevenly, the product quality is unstable, and the yield is low; Second, the working power of the kiln is relatively high, which needs to reach 250KW·h, and the energy consumption is relatively high

Method used

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  • Technique for producing and reducing ilmenite in industrial microwave kiln
  • Technique for producing and reducing ilmenite in industrial microwave kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The raw materials used in this implementation include ilmenite, reducing agent and desulfurizing agent, the weight ratio of ilmenite and reducing agent is 1:0.5, and the dosage ratio of reducing agent and desulfurizing agent is 1:0.07.

[0052] 1. Put the raw materials into the sagger and put them on the setter. Driven by the screw propeller, the raw materials enter the preheating zone along the way and heat for 1 hour. The temperature in the preheating zone is controlled at 300°C.

[0053] 2. The raw material enters the heating zone with the roller table and is heated for 1 hour. The temperature of the heating zone is controlled at 500°C, and the exhaust fan is turned on to extract harmful gases and powder impurities.

[0054] 3. The raw material enters the sintering heat preservation zone along with the roller table and is heated for 1 hour. The magnetron is also controlled to emit microwaves with a frequency of 2450MHz into the sintering heat preservation zone. The mi...

Embodiment 2

[0060] The difference between this embodiment and embodiment 1 is:

[0061] The weight ratio of iron ore and reducing agent in the raw material is 1:0.4, and the consumption ratio of reducing agent and desulfurizing agent is 1:0.05;

[0062] The temperature in the preheating zone is 250°C;

[0063] The temperature in the heating zone is 400°C;

[0064] The temperature of the sintering holding zone is 600°C.

[0065] The product yield rate that present embodiment makes is 92%.

Embodiment 3

[0067] The difference between this embodiment and embodiment 1 is:

[0068] The weight ratio of iron ore and reducing agent in the raw material is 1:0.8, and the consumption ratio of reducing agent and desulfurizing agent is 1:0.06;

[0069] The temperature in the preheating zone is 40°C;

[0070] The temperature in the heating zone is 600°C;

[0071] The temperature of the sintering holding zone is 800°C.

[0072] The product yield rate that present embodiment makes is 94%.

[0073] It can be known from the above results that, compared with the existing ilmenite production process, the method provided by the present invention has lower energy consumption and saves 50% to 70% of electricity consumption, and the product yield is higher than 90%.

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Abstract

The invention provides a method for reducing ilmenite, which comprises the following steps: sending ilmenite, a reducer and a desulfurizer, which serve as raw materials, into a microwave high-temperature kiln; sequentially preheating, sintering and cooling; and sequentially pulverizing, screening, carrying out magnetic separation, and carrying out jet mil blending, wherein in the sintering process, microwaves of which the frequency is 2450MHz are emitted to the raw materials until the reduction temperature of the sintering belt in the kiln reaches 600-800 DEG C. In the sintering step, the microwaves of which the frequency is 2450MHz are emitted to the raw materials, so that the raw materials quickly absorb microwave energy from inside to outside, thereby ensuring the integral heating uniformity of the material, enhancing the heating uniformity of the raw materials, enabling the ilmenite to sufficiently participate into the reducing reaction, and being beneficial to enhancing the grade of the product; the microwave heating speed is high, so that the time for reaching the temperature required by the generation of the reducing reaction is shortened, thereby shortening the production cycle and lowering the energy consumption. Therefore, the ilmenite prepared by the method provided by the invention has the characteristics of high product yield and low energy consumption.

Description

technical field [0001] The invention relates to the field of ore processing, in particular to a process method for producing reduced ilmenite in an industrial microwave kiln. Background technique [0002] Ilmenite is an oxide mineral of iron and titanium, which is the main ore from which titanium is extracted. my country is rich in titanium resources, with reserves of about 10 billion tons, accounting for 80% of the world's titanium resources, of which rutile and anatase account for about 20%. The characteristics of titanium ore in my country are: high-grade natural rutile is relatively poor, and low-grade compound paragenetic ore reserves are relatively large. In recent years, with the development of titanium industry, natural rutile resources are becoming increasingly depleted, so people pay more and more attention to the development and utilization of abundant ilmenite resources. [0003] Although ilmenite is rich in reserves, the grade of titanium is low. If it is dire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/12C21B13/00
Inventor 刘伏初李蔚霞陶立平
Owner 湖南阳东微波科技有限公司
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