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Process for preparing foundry coke

A coke and carbonization technology, which is applied in the field of casting coke preparation, can solve problems such as insufficient strength, sulfur content in ash, porosity and lumpiness, insufficient combustion of volatile matter, and environmental pollution caused by volatile matter, achieving low ash content, Uniform lumpiness, the effect of solving environmental pollution

Active Publication Date: 2006-08-09
常泰建设集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coking equipment used includes vertical box furnace, inclined bottom furnace, tamping coke oven, etc. The process is complex and the investment in equipment is large.
The volatile matter generated in the carbonization process is not fully burned, the fuel consumption is high, and the overflowed volatile matter seriously pollutes the environment
Moreover, the strength, ash content, sulfur content, porosity and lumpiness of the product are not ideal enough to achieve casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of raw material anthracite is as shown in table 3:

[0026] Test indicators

[0027] Break it into three particle sizes of 1-3 mm, 0.18-1 mm, and <0.18 mm for later use; coal tar pitch and coal tar from Kunming Iron and Steel Company are used as binders, and the material ratio is shown in Table 4:

[0028] name

[0029] The temperature of the kneader (Jiangsu Rugao Jingshang Kneading Machinery Factory, SH-10 type) was raised to 120° C., and anthracite of three particle sizes was added into the kneader and stirred for 10 minutes. Melt the coal tar pitch and coal tar respectively, mix them, pour them into a kneader, and stir at 120°C for 10 minutes. The kneaded material was put into a mold, and formed into a cylindrical sample of φ80×100 mm under a pressure of 40 MPa by stamping. Put the above sample into the carbonization furnace, cover it with coke powder, control the heating process, and see Table 5 for the temperature rise record. ...

Embodiment 2

[0033] Repeat embodiment 1, have following difference: raw material measurement result is shown in Table 7. Proportioning of materials is shown in Table 8.

[0034] Test indicators

[0035] name

[0036] The temperature of the kneader was raised to 120° C., and anthracite coal of three particle sizes was added into the kneader and stirred for 10 minutes. Melt the coal tar pitch and coal tar respectively, mix them, pour them into a kneader, and stir at 120°C for 10 minutes. The above-mentioned kneaded materials were loaded into a mold, and formed into a pillow-shaped sample of φ80×65 under a pressure of 20 MPa by means of double-roll forming. Put the above sample into the ring type carbonization furnace, cover the upper part with 50 mm thick coke powder, control the heating process, the temperature rising record is shown in Table 9. The product quality test is shown in Table 10.

[0037] temperature range

[0038] block degree, mm

Embodiment 3

[0040] Except that the raw material ratio is 20% of anthracite of 1-3 mm, 24% of anthracite of 0.18-1 mm, 40% of anthracite of <0.18 mm, 10% of coal tar pitch, and 6% of coal tar, other processes are the same as in Example 1. The product quality meets the requirements of national standard super foundry coke.

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PUM

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Abstract

The invention discloses a method for preparing foundry coke, employing blind coal as stock, disintegrating it separately into three grade size: 1~3mm, 0.18~1mm, <0.18mm, for reservation. Adding coal pitch and coal tar as adhensive, filling the mixing and kneading pot with the said three blind coal, stirring at the temperature 110~130 DEG C for 10 minutes, adding the fused coal pitch and coal tar into the mixing and kneading pot, stirring for 10 minutes. Employing pair roller forming or press forming to the mixed and kneaded sample for forming, then setting for 24 hours, for reservation. Feeding the retort with formed sample for warming-up and charring, covering the surface of the sample with pulverized coke for air insulation and avoiding oxidization; cooling in natural way after charring to normal temperature, removing the pulverized coke, fetching it out and getting the needed product.

Description

technical field [0001] The present invention relates to a method for preparing coke, more specifically, the present invention relates to a method for preparing foundry coke. Background technique [0002] In the prior art, when anthracite is used to produce coke, especially when producing foundry coke, due to the poor cohesiveness of anthracite, it is generally necessary to add part of coking coal or fat coal to the raw material, and use the cohesiveness of coking coal and fat coal in carbonization. In the process, the anthracite is bonded and shaped. If the ash content of the raw coal is high, some petroleum coke should be added in order to reduce the ash content in the coke. The coking equipment used includes vertical box furnace, inclined bottom furnace, tamping coke oven, etc. The process is complicated and the investment in equipment is large. The volatile matter generated in the carbonization process is not fully burned, the fuel consumption ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B57/04
Inventor 许阳王麒壹郭伟陈训生王媛曹梦麟张庆波刘静李启龙铁琦尹承绪
Owner 常泰建设集团有限公司
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