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Bonding agent for stemming and preparation method thereof

A technology of binder and gun clay, which is applied in the field of binder for gun clay and its preparation, which can solve the problems of environmental pollution, insufficient extrusion length of gun clay, and easy thickening of products

Inactive Publication Date: 2012-06-13
SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects of this kind of blast clay are: the apparent porosity is high, the stability is poor, and carcinogens such as benzopyrene will be released during use, which seriously pollutes the environment and endangers the health of operators.
Existing phenolic resins for gun clay are mainly resole phenolic resins, and its disadvantage is that the heat curing rate is relatively fast. On the one hand, it will cause the plasticity of the gun clay to be insufficient, resulting in easy agglomeration of the gun clay, blocking the clay gun, and destroying the normal output. At the same time, the extrusion length is not enough and the strength is low when using clay. On the other hand, the resin storage conditions are relatively high, and the shelf life is short. In summer, it is only 1 month. After the shelf life, the product is easy to thicken and the quality of the resin decreases. , reduce the pass rate of clay

Method used

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  • Bonding agent for stemming and preparation method thereof
  • Bonding agent for stemming and preparation method thereof

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preparation example Construction

[0024] The embodiment of the invention discloses a method for preparing a binder for gun clay, comprising the following steps:

[0025] a), under the condition that basic catalyst exists, phenol and formaldehyde take place polymerization reaction, obtain resole phenolic resin, the mol ratio of described phenol, formaldehyde and basic catalyst is 1: (1.2~2): (0.01~0.1 ); The resole phenolic resin is mixed with the first organic solvent to obtain a resole phenolic resin solution;

[0026] b), in the presence of an acidic catalyst, phenol and formaldehyde undergo a condensation reaction to obtain a novolak resin, the molar ratio of the phenol, formaldehyde and the acidic catalyst being 1: (0.5-0.9): (0.01-0.4); Dissolving the novolac resin in a second organic solvent to obtain a novolac resin solution;

[0027] c), described resole phenolic resin solution and novolak resin solution are mixed uniformly, obtain the bonding agent for blasting clay, the mass ratio of resole phenolic...

Embodiment 1

[0042] Phenol, formaldehyde and sodium hydroxide solution (concentration: 48%) are fed in a molar ratio of 1:1.43:0.04, stirred at 75°C for 5 hours, and further condensed after dehydration under reduced pressure to obtain a resole phenolic resin. Diethylene glycol is added to the resin to adjust the viscosity to 6300cp / 25°C to obtain a resole phenolic resin solution.

[0043] Feed phenol, formaldehyde and sulfuric acid (concentration: 25%) in a molar ratio of 1:0.77:0.01, raise the temperature to 90-100°C, and keep the temperature at this temperature for 3 hours to obtain a novolac resin, which is then dehydrated under reduced pressure to the novolak resin. Add ethylene glycol to the resin until the viscosity reaches 4800cp / 25°C to obtain a novolac resin solution.

[0044] The resole phenolic resin solution and the novolac resin solution are mixed according to the mass ratio of the resole phenolic resin to the novolak resin at a ratio of 1:2.5 times to obtain a binder for gun ...

Embodiment 2

[0046] Feed phenol, formaldehyde and sodium carbonate solution (concentration: 45%) in a molar ratio of 1:1.2:0.05, stir at 82°C for 3 hours, and further condense after dehydration under reduced pressure. The content of free phenol in the mixed solution is 7-9%. Terminate to obtain a resole phenolic resin, add furfuryl alcohol to the resole phenolic resin to adjust the viscosity to 11000cp / 25°C to obtain a resole phenolic resin solution.

[0047] Feed phenol, formaldehyde and sulfuric acid (concentration: 50%) in a molar ratio of 1:0.77:0.01, raise the temperature to 90-100°C, and keep the temperature at this temperature for 4 hours to obtain a novolac resin. Add ethylene glycol to the type phenolic resin until the viscosity is 3800cp / 25°C to obtain the novolak resin solution.

[0048] The resole phenolic resin solution and the novolac resin solution are mixed according to the mass ratio of the resole phenolic resin to the novolac resin at a ratio of 1:4.8 to obtain a binder f...

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Abstract

The invention provides a bonding agent for stemming and a preparation method thereof. The method comprises the following steps of: synthesizing A-stage phenolic resin and mixing the A-stage phenolic resin with a first organic solvent to obtain A-stage phenolic resin solution; synthesizing linear phenolic resin, mixing the linear phenolic resin with a second organic solvent to obtain linear phenolic resin solution; uniformly mixing the A-stage phenolic resin solution with the linear phenolic resin solution to obtain the bonding agent for the stemming; and the mass ratio of the A-stage phenolic resin and the linear phenolic resin in the bonding agent for the stemming is (2-50):(50-98). The bonding agent has the beneficial effects that the linear phenolic resin is adopted as the resin component of the bonding agent; the A-stage phenolic resin is adopted as the component of a curing agent; the curing rate is slower and is about 10-20 minutes; as the mobility of the stemming at a high temperature is beneficial to being improved through reducing the curing rate, the stemming is not easily blocked in a mud gun; and meanwhile, the storage condition of the bonding agent is also greatly reduced so as to be beneficial to prolonging the quality guarantee period of the bonding agent.

Description

technical field [0001] The invention relates to the field of blast furnace clay, in particular to a binder for clay and a preparation method thereof. Background technique [0002] Blast furnace is the main equipment for ironmaking production. Compared with other ironmaking equipment, it has the characteristics of large output, high yield and low production cost. With the rapid development of the iron-making industry, the blast furnace is gradually developing towards the direction of long life, intensified smelting and large-scale, which has higher and higher requirements for the quality of blast furnace clay. When the blast furnace does not produce molten iron slag, the blast furnace mud is filled in the tap hole to maintain a sufficient depth; when the blast furnace taps iron, the center of the blast furnace mud in the tap hole is drilled out of the tunnel, and the molten iron slag is discharged out of the furnace through the tunnel. During the ironmaking process, the taph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10C04B35/66
Inventor 唐一林江成真魏务翠任延青
Owner SHANDONG SHENGQUAN NEW MATERIALS CO LTD
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