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Impact-resistant polyurethane sieve plate for sieving ore

A polyurethane and impact-resistant technology, applied in the field of polyurethane sieve plates, can solve problems such as internal cracks and reduce service life, and achieve the effects of strong elongation at break, prolong service life, and increase impact resistance.

Inactive Publication Date: 2020-02-07
太和县绿源滤材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to design a polyurethane sieve plate for impact-resistant ore screening, so as to solve the problem that the existing polyurethane sieve plate is impacted by large ore to cause internal cracks and reduce the service life when screening ores.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A polyurethane sieve plate for impact-resistant ore screening, comprising the following steps:

[0025] (1) Active calcium silicate modification: Take 55kg of active calcium silicate, add it to α-methacrylic acid twice its own weight, heat it to 85°C, stir it evenly, and then put it into a high-pressure reactor. Raise the temperature to 130°C and react for 30 minutes, then filter, and then dry the filtered active calcium silicate under hot air at 50°C to obtain modified active calcium silicate, which is ready for use;

[0026] (2) Preparation of composite filler: Take 40kg of modified active calcium silicate prepared in step (1) and 54kg of polyphenolic oxygen resin into a ball mill, add 5kg of silane coupling agent and 12kg of absolute ethanol, and then Ball mill at a speed of 800r / min, the weight of the grinding balls during ball milling is 95kg, the ball-to-material ratio is 2:1, take it out for later use;

[0027] (3) Preparation of prepolymer: Put 240kg of toluene...

Embodiment 2

[0034] A polyurethane sieve plate for impact-resistant ore screening, comprising the following steps:

[0035](1) Active calcium silicate modification: take 45kg of active calcium silicate, add it to α-methacrylic acid 2.5 times its own weight, heat it to 85°C, stir it evenly, and put it all into a high-pressure reactor. Raise the temperature to 120°C and react for 30 minutes, then filter, and then dry the filtered active calcium silicate under hot air at 50°C to obtain modified active calcium silicate, which is ready for use;

[0036] (2) Preparation of composite filler: Take 40kg of active calcium silicate prepared in step (1) and 54kg of polyphenolic oxygen resin into a ball mill, add 5kg of silane coupling agent and 12kg of absolute ethanol, and then Ball mill at a speed of 1 / min, the ball-to-material ratio is 2:1, take it out after ball milling for 60 minutes;

[0037] (3) Preparation of prepolymer: Put 220kg of toluene diisocyanate and 200kg of dehydrated polyester poly...

Embodiment 3

[0044] A polyurethane sieve plate for impact-resistant ore screening, comprising the following steps:

[0045] (1) Active calcium silicate modification: Take 60kg of active calcium silicate, add it to α-methacrylic acid twice its own weight, heat it to 85°C, stir it evenly, and put it all into the high-pressure reactor. Raise the temperature to 140°C and react for 30 minutes, then filter, and then dry the filtered active calcium silicate under hot air at 50°C to obtain modified active calcium silicate, which is ready for use;

[0046] (2) Preparation of composite filler: Take 40kg of active calcium silicate prepared in step (1) and 54kg of polyphenolic oxygen resin into a ball mill, add 5kg of silane coupling agent and 12kg of absolute ethanol, and then Ball mill at a speed of 1 / min, the ball-to-material ratio is 2:1, take it out after ball milling for 60 minutes;

[0047] (3) Preparation of prepolymer: Put 250kg of toluene diisocyanate and 240kg of dehydrated polyester polyo...

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Abstract

The invention relates to the technical field of polyurethane sieve plate, in particular to an impact-resistant polyurethane sieve plate for sieving ore, which comprises seven steps of modification ofactive calcium silicate, preparation of composite filler, preparation of prepolymer, chain extension of prepolymer, casting molding, demoulding vulcanization and low temperature curing. The polyurethane sieve plate prepared by the invention is prepared by inserting active calcium silicate into the long chain of polyphenol oxide resin, as that polyphenol oxide resin is uniformly distributed in thepolyurethane, crosslinked networks and a large number of hydrogen bonds are formed in the polyurethane, which greatly increases the impact resistance of the polyurethane sieve plate, and the compositepowder does not reduce the wear resistance of the polyurethane sieve screen while enhancing the impact resistance of the polyurethane sieve screen, so that the service life of the polyurethane sievescreen when screening ores is as high as 6-7 months.

Description

technical field [0001] The invention relates to the technical field of polyurethane sieve plates, in particular to a polyurethane sieve plate for impact-resistant ore screening. Background technique [0002] In the process of mining, it is necessary to use a vibrating screening machine to screen the ore. The sieve plate in the vibrating screening machine needs strong impact resistance and wear resistance. At present, the sieve plate in the vibrating screening machine is mainly divided into polyurethane sieve plate and Stainless steel sieve. Although the stainless steel sieve plate has a high porosity rate, its impact resistance and wear resistance are poor, and it is easy to damage the sieve plate in the face of repeated impact and friction of ore, while the polyurethane sieve plate has a high elastic modulus and friction resistance. The service life of ore screening is 3-4 times that of ordinary stainless steel sieve plates, which can reduce the frequency of vibrating scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L63/00C08K9/06C08K9/04C08K3/34C08G18/66C08G18/42C08G18/64C08G18/32C08G18/12
CPCC08G18/12C08G18/3814C08G18/4081C08G18/42C08G18/6492C08G18/6651C08L75/06C08L63/00C08K9/06C08K9/04C08K3/34
Inventor 高俊礼
Owner 太和县绿源滤材有限公司
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