Low-temperature concretion adhesive for cold press iron coke and preparation method thereof

A technology of binder and iron coke, applied in the field of iron and steel metallurgy to achieve the effect of increasing the bonding performance

Inactive Publication Date: 2010-01-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to develop a low-cost and high-efficiency binder with good formability, low impurity content, and no secondary pollution and its preparation method. Using this binder, a large proportion of coke powder can ...

Method used

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  • Low-temperature concretion adhesive for cold press iron coke and preparation method thereof

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Effect test

Embodiment 1

[0028] Example 1: The ratio of raw materials for producing a binder SHN: silica sol: water is 1:5:12, 0.2% NaOH is added as a stabilizer, and the mass percentage of silica sol is 40.0%. The reaction conditions are as follows: the reaction temperature of the reactor is 180° C., the vapor pressure is 1.3 Mpa, and the reaction time is 2.5 hours. The binder is obtained by cooling and separating the sedimented insoluble matter.

Embodiment 2

[0029] Example 2: The raw material ratio of SHN: silica gel: water for the production of adhesive is 1:5:12, 0.3% KOH is added as a stabilizer, and the mass percentage of silica gel is 50.5%. The reaction conditions are as follows: the reaction temperature of the reactor is 185°C, the vapor pressure is 1.2Mpa, the reaction time is 3 hours, and the insoluble matter is cooled and separated to obtain the binder.

Embodiment 3

[0030] Embodiment 3: The ratio of raw materials for producing the binder is sodium carboxymethyl cellulose: silica sol: water is 1.2: 6: 12, 0.2% NaOH is added as a stabilizer, and the mass percentage of silica sol is 40%. The reaction conditions are as follows: the reaction temperature of the reactor is 190°C, the vapor pressure is 1.2Mpa, the reaction time is 2.5 hours, the insoluble matter is cooled and separated to obtain the binder.

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Abstract

The invention relates to a novel low-temperature concretion adhesive for cold press iron coke and a preparation method thereof and develops a high-efficiency adhesive with low cost, good molding property, low impurity content and no production of secondary pollution. By using the adhesive, coke powder can be used in a large proportion for preparing iron coke, and the iron coke has cold strength for meeting the requirements of operation and drop under the condition of cold press molding and thermal strength for meeting the requirement of smelting under the condition of low-temperature concretion. The adhesive is prepared by the method as follows: 0.5 to 1.5 organic high molecular polymer, 5 to 7 silica sol or 11 to 13 silica gel and water are mixed; and a stabilizing agent accounting for 0.05 wt% to 0.6 wt% of the mixed solution is added to react for 1.5 hours to 3 hours at 1.2Mpa to 1.4Mpa and 170 DEG C to 190 DEG C. The solution has high viscosity because components in the adhesive are grafted and bridged into a netted structure and also has high dispersivity under the action of the 0.05 wt% to 0.6 wt% of stabilizing agent.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a new low-temperature solidifying binder for cold-pressed iron coke and a preparation method. Background technique [0002] Blast furnace smelting requires a large amount of high-quality metallurgical coke, and its production depends on coking coal with good coking performance. Due to the uneven distribution of coking coal resources in my country, and the coke production is strictly limited due to high energy consumption in the coking process and serious environmental pollution. In addition, the iron and steel industry Rapid development has caused many manufacturers to be in short supply of coke resources. However, coke powder, whose physical and chemical properties such as chemical composition and calorific value are not much different from coke, cannot be well utilized because its particle size is too small to affect the air permeability of the blast furnace charge column....

Claims

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Application Information

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IPC IPC(8): C22B1/244
Inventor 范晓慧甘敏张振慧陈许玲姜涛袁礼顺李光辉黄柱成杨永斌郭宇峰李骞张元波白国华许斌
Owner CENT SOUTH UNIV
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