A kind of preparation method of modified limestone powder

A technology of limestone powder and limestone, applied in the field of preparation of modified limestone powder, can solve the problems of unsatisfactory desulfurization effect, insignificant sulfur adsorption effect, low desulfurization efficiency, etc. The effect of adsorption

Active Publication Date: 2018-07-13
阳泉元丰建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common limestone currently available on the market, although its particle size meets the requirements for use, its desulfurization effect still cannot meet the requirements, and the desulfurization efficiency is low. A large amount of limestone is needed to achieve a certain desulfurization effect, and it absorbs sulfur. Elemental limestone does not have a significant adsorption effect on sulfur, and sulfur tends to overflow by itself after a period of time, causing pollution to the environment again

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of modified limestone powder, comprising the following steps:

[0017] (1) After the large limestone is crushed by a jaw crusher, it is passed through a 20-mesh sieve;

[0018] (2) After the sieved limestone is mixed with microcrystalline wax, it is sent to the storage hopper by the elevator, and then evenly and quantitatively sent to the main mill of the European version of the mill by the vibrating feeder for grinding. , the limestone powder after grinding is blown by the wind and classified by a powder classifier to obtain 325 mesh modified limestone powder, wherein the additive is made of the following components by weight: 17 parts of polybenzimidazole, N, N - 10 parts of dimethylethanolamine, 11 parts of aluminum triisopropoxide.

[0019] Specifically, the above-mentioned microcrystalline wax has a density of 0.85 g / cm 3 , with a melting point of 70°C.

[0020] Specifically, the amount of microcrystalline wax added is: 2 kg of microcrystall...

Embodiment 2

[0024] A preparation method of modified limestone powder, comprising the following steps:

[0025] (1) After the large limestone is crushed by a jaw crusher, it is passed through a 25-mesh sieve;

[0026] (2) After the sieved limestone is mixed with microcrystalline wax, it is sent to the storage hopper by the elevator, and then evenly and quantitatively sent to the main mill of the European version of the mill by the vibrating feeder for grinding. , the limestone powder after grinding is blown by the wind and classified by a powder classifier to obtain 325 mesh modified limestone powder, wherein the additive is made of the following components by weight: 20 parts of polybenzimidazole, N, N - 14 parts of dimethylethanolamine, 15 parts of aluminum triisopropoxide.

[0027] Specifically, the density of the above-mentioned microcrystalline wax is 0.87g / cm 3 , with a melting point of 70°C.

[0028] Specifically, the amount of microcrystalline wax added is: 2.5 kg of microcrysta...

Embodiment 3

[0032] A preparation method of modified limestone powder, comprising the following steps:

[0033] (1) After the large limestone is crushed by a jaw crusher, pass through a 30-mesh sieve;

[0034] (2) After the sieved limestone is mixed with microcrystalline wax, it is sent to the storage hopper by the elevator, and then evenly and quantitatively sent to the main mill of the European version of the mill by the vibrating feeder for grinding. , the limestone powder after grinding is blown by the wind and classified by a powder classifier to obtain 325 mesh modified limestone powder, wherein the additive is made of the following components by weight: polybenzimidazole 22 parts, N, N - 16 parts of dimethylethanolamine, 18 parts of aluminum triisopropoxide.

[0035] Specifically, the density of the above-mentioned microcrystalline wax is 0.88g / cm 3 , with a melting point of 70°C.

[0036] Specifically, the amount of microcrystalline wax added is: 3 kg of microcrystalline wax per...

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Abstract

The invention provides a preparation method of modified limestone powder. The method comprises the following operation steps that (1) after big blocks of limestone are subjected to crushing treatment by a jaw type crushing machine, the limestone is sieved by a sieve being 20 to 30 meshes; (2) the sieved limestone is mixed with microcrystalline wax, then, an obtained mixture is conveyed to a material storage hopper by an elevator; next, the materials are uniformly, quantitatively and continuously conveyed into a host grinding chamber of an European style powder grinding machine to be ground through a vibration feeding machine; the ground limestone powder is blown up by wind and is graded by a powder selection machine; 325-mesh modified limestone powder is prepared. The preparation method of the modified limestone powder provided by the invention has the advantages that the operation is simple; the raw materials can be easily obtained; the manufacturing cost is low; the performance is stable; non-toxicity and harmlessness are realized; environment is protected; no pollution is caused; the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of limestone powder processing, and in particular relates to a preparation method of modified limestone powder. Background technique [0002] Lime powder is a white powdery substance with calcium carbonate as the main component. Due to the large population of our country and the relatively large power consumption, the exhaust gas emitted by power plants has caused serious environmental pollution. Therefore, the power plants now use limestone powder desulfurization methods to remove sulfur dioxide in the exhaust gas and avoid environmental pollution. , The limestone powder used for desulfurization requires a particle size of 250 mesh or 325 mesh (45μm), and the desulfurization effect of 325 mesh limestone powder is better. However, the common limestone currently available on the market, although its particle size meets the requirements for use, its desulfurization effect still cannot meet the requirements, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B01D53/02B01D53/26
CPCB01D53/02B01D53/261B01D2257/302B01J20/043B01J20/22B01J20/223B01J20/26
Inventor 张海龙
Owner 阳泉元丰建材有限公司
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