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A method for improving the quality of sintered ore in large-scale limonite sintering production

A technology for sintering ore and limonite, which is applied in the field of improving the quality of sintering ore in the sintering production of large-scale limonite, can solve problems such as being unable to adapt to limonite sintering, etc., and achieves good droplet performance, suppression of quality decline, and reduced output. inhibiting effect

Active Publication Date: 2021-06-29
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a method for improving the quality of sintered ore in large-scale limonite sintering production in view of the above-mentioned problems. , adding SYP sintering synergist and other measures to improve the sintering quality to solve the problem that the existing sintering technology cannot adapt to the sintering of limonite with a ratio of more than 60wt%

Method used

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  • A method for improving the quality of sintered ore in large-scale limonite sintering production
  • A method for improving the quality of sintered ore in large-scale limonite sintering production
  • A method for improving the quality of sintered ore in large-scale limonite sintering production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1 ore blending, get the following ratio ore blending table according to the operating conditions:

[0036] 1. Mixed ore blending

[0037] Table 1-1 Mixed ore proportioning (wt%)

[0038] materials limonite powder ore Fine-grained high-quality magnet essence fine vanadium titanium magnet secondary resources total Proportion 60 25 12 3 100

[0039] Step 2 Mix the ore to build a heap, provide the ratio according to Table 1 in Step 1, and organize the heap according to the parameters in Table 1-2

[0040] Table 1-2 Mixed ore stacking parameters

[0041]

[0042]

[0043] Step 3 Sinter the batching room ingredients:

[0044] Table 1-3 Proportion of raw material and fuel in sintering batching room (%)

[0045] materials Mixed ore High quality burnt powder quicklime limestone dolomite SYP synergist Proportion 79 4.7 5.0 6.0 5.3 0.028

[0046] According to the ratio of Table 1-3, the materials ...

Embodiment 2

[0064] Step 1 ore blending, get the following ratio ore blending table according to the operating conditions:

[0065] 1. Mixed ore blending

[0066] Table 2-1 Proportion of mixed ore (%)

[0067]

[0068] Step 2 Mix the ore to build a pile, provide the ratio according to Table 2-1 in Step 1, and organize the pile according to the parameters in Table 2-2:

[0069] Table 2-2 Mixed ore stacking parameters

[0070]

[0071] Step 3 Sinter the batching room batching

[0072] Table 2-3 Proportion of raw material and fuel in sintering batching room (%)

[0073]

[0074] According to the ratio in Table 2-3, the materials obtained are mixed in the primary mixer, granulated, and moistened with a small amount of water. The moisture content of the primary mixer mixture is controlled to 6.0%, and the secondary mixer is mixed into the secondary mixer. After the mixer, add water for mixing, and control the water content of granulation at 8.8%, to obtain the secondary mixture;

...

Embodiment 3

[0092] Step 1 ore blending, get the following ratio ore blending table according to the operating conditions:

[0093] 1. Mixed ore blending

[0094] Table 3-1 Proportion of mixed ore (%)

[0095]

[0096] Step 2 Mix the ore to build a heap, provide the ratio according to Table 3-1 in Step 1, and organize the heap according to the parameters in Table 3-2

[0097] Table 3-2 Parameters of mixing ore pile building

[0098]

[0099] Step 3 Sinter the batching room batching

[0100] Table 3-3 Raw material and fuel ratio of sintering batching room (%)

[0101]

[0102] According to the ratio in Table 3-3, the materials obtained are mixed in the primary mixer, granulated, and moistened with a small amount of water. The moisture content of the mixture in the primary mixer is controlled to 6.0%. After the mixer, add water for mixing, control the water content of granulation at 9.0%, and obtain the secondary mixture;

[0103] Step 4, sintering the cloth. The secondary mix...

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Abstract

The invention discloses a method for improving the quality of sintered ore in large-scale limonite sintering production, comprising the following steps: step 1, ore blending, the ratio of limonite is 60-80wt%, and the ratio of fine-grained high-quality magnetite concentrate is not Less than 20wt%, during ore blending, the following constraints are imposed on the sinter composition: sinter basicity 2.20‑2.60, sinter SiO 2 / Al 2 o 3 The ratio satisfies 3.0-4.0, and the MgO content is 1.5-2.5wt%; step 2, mix and pile up and carry out batching, and add 4.5-5.0wt% coke powder, 4.0-6.0wt% quicklime, 4 ‑7wt% limestone and 0.028‑0.035wt% SYP synergist are mixed together and other steps. The invention improves the sintering quality by adopting measures such as high alkalinity, low MgO sintering, raising ignition temperature, etc., and solves the problem that the existing sintering technology cannot adapt to the limonite sintering with a ratio of more than 60 wt%.

Description

technical field [0001] The invention relates to the technical field of limonite sintering, in particular to a method for improving the quality of sintered ore in large-scale limonite sintering production. Background technique [0002] Limonite has high crystal water content and high burning loss. During the sintering process, the ore is easy to shrink to form a sintered ore with thin-walled large pores. Adding a large amount will have a negative impact on the sintering product quality. [0003] At present, the proportion of limonite used in a large proportion in China is between 40-60wt% (wt% represents mass percentage), and the drum index of sintered ore is between 76-78%, and the proportion of limonite is increased to When it is more than 60wt%, the defects of limonite are obviously exposed. Traditional methods such as improving the amount of sintering carbon, adding water, and temperature control have been unable to overcome the defects exposed by limonite itself during s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 李轶毛林猛陈军周伟杨凯
Owner WUKUN STEEL
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