Method of producing high-titanium products and sponge iron using arentilla and coal slime as raw materials

A technology of ilmenite ore and sponge iron, applied in the field of comprehensive utilization of resources, can solve the problems of occupying land resources, high ash content, high moisture content, etc., and achieve the effects of saving coal resources, high economic value, and reducing production costs

Inactive Publication Date: 2019-05-31
鄂尔多斯市昊华红庆梁矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, coal slime has the characteristics of high moisture content, strong water holding capacity, high viscosity, and high ash content. Except for a small part that is burned in boilers and used to make molded coal and molded coke, most of it is stored. Occupy a large amount of land resources, the formation of dust also causes environmental pollution
Most importantly, because it contains some solid carbon resources, it also causes a huge waste of resources

Method used

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  • Method of producing high-titanium products and sponge iron using arentilla and coal slime as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A ilmenite-containing ore with a particle size of 50cm~15cm has Fe grade of 40.28%, TiO 2 The grade is 8.25%. Using the method of the present invention, the mass ratio of ilmenite to coal slime is 1:0.32, the mass ratio to bentonite is 1:0.04, and the mass ratio to sodium carbonate and calcium carbonate is 1:0.015 and 1:0.06 respectively, and after mixing Press it into a block of 8cm×6cm×4cm, put the briquette into a roasting crucible, reduce and roast in a muffle furnace with a deep reduction temperature of 1260°C for 60 minutes to obtain a roasted product, and the roasted product is wet-ground after cooling, and the initial grinding The ore concentration is 60%, the first stage grinding product fineness -0.074 mm is 70%, and the second stage grinding fineness is -0.074 mm is 85%. Under the conditions of magnetic separation, a high-titanium product with a titanium dioxide content of 25.56% and a titanium dioxide recovery rate of 95.83% was obtained, and a sponge iron ...

Embodiment 2

[0016] A ilmenite-containing ore with a particle size of 50cm~10cm has Fe grade of 45.62%, TiO 2 The grade is 12.56%. Using the method of the present invention, the mass ratio of ilmenite to coal slime is 1:0.34, the mass ratio to bentonite is 1:0.05, and the mass ratio to sodium carbonate and calcium carbonate is 1:0.015 and 1:0.085 respectively, after mixing Pressed into a block of 8cm×6cm×4cm, put the briquette into a roasting crucible, reduce and roast in a muffle furnace with a deep reduction temperature of 1300°C for 50 minutes to obtain a roasted product, and the roasted product is wet-ground after cooling, and the initial grinding The ore mass concentration is 60%, the first-stage grinding product fineness -0.074 mm is 70%, the second-stage grinding fineness is -0.043 mm, which is 80%, and the products obtained by the two-stage grinding are all in a magnetic field with a strength of 1.8 kGs Under the condition of magnetic separation, a high-titanium product with a tit...

Embodiment 3

[0018] A ilmenite-containing ore with a particle size of 45cm~5cm has a Fe grade of 54.67%, TiO 2The grade is 14.86%. By adopting the method of the present invention, the mass ratio of ilmenite to coal slime is 1:0.38, the mass ratio to bentonite is 1:0.07, and the mass ratio to sodium carbonate and calcium carbonate is 1:0.015 and 1:0.10 respectively, after mixing Pressed into a block of 8cm×6cm×4cm, put the briquette into a roasting crucible, reduce and roast in a muffle furnace with a deep reduction temperature of 1350°C for 36 minutes to obtain a roasted product, and the roasted product is wet-ground after cooling, and the initial grinding The ore concentration is 60%, the first stage grinding product fineness -0.074 mm is 70%, the second stage grinding fineness is -0.043 mm is 80%, the products obtained by the two stage grinding are all under the condition of magnetic field strength of 2kGs Under magnetic separation, a high-titanium product with a titanium dioxide conten...

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Abstract

The invention belongs to the field category of resource comprehensive utilization, and relates to a method of producing high-titanium products and sponge iron using coal slime and arentilla as raw materials. The method comprises the following steps that the solid waste coal slime is used as a reducing agent, bentonite is used as a bonding agent, and sodium carbonate and calcium carbonate are usedas an additive, and the reducing agent, the bonding agent and the additive are uniformly mixed with the arentilla to be pressed into blocks; then deep reducing roasting is performed to obtain roastedproducts; and ore grinding-magnetic separation is performed for two times, so that the high-titanium products and sponge iron products can be obtained. The method disclosed by the invention is simplein technique method, not only resource recycling of the solid waste coal slime is realized, but also using of coal powder which is high in cost is avoided; besides, through the effect of the additive,the ferrotitanium high-efficiency separation of the arentilla is difficult to sort, and finally, the high-titanium products of which the content of titanium dioxide is greater than 25% and the spongeiron products of which the content of the iron is greater than 92% can be obtained; and through the adoption of the method, the recovery rate of the titanium dioxide is generally greater than 91%, and the recovery rate of the iron is generally greater than 86%, so that the purpose of comprehensively utilizing resources is achieved.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of resources and provides a method for producing high-titanium products and sponge iron by using ilmenite-containing ore and coal slime. Background technique [0002] With the rapid and stable development of China's economy, the scale of China's steel production has also grown rapidly. However, due to the characteristics of poor, fine and miscellaneous iron ore in China, it is difficult to sort and utilize, so a large amount of iron ore needs to be imported. According to statistics, China's dependence on foreign iron ore has exceeded 80%. From the perspective of national strategy, my country's iron ore supply must not rely on imports for a long time. Therefore, it is inevitable to rationally develop other iron-containing mineral resources, among which ilmenite is one of them. Titanium is a rare metal that is difficult to extract because it exists and is dispersed in nature. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/02C22B34/12C21B13/00C22B5/10
Inventor 张兴文李现华彭伟荆萍
Owner 鄂尔多斯市昊华红庆梁矿业有限公司
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