Quick energy-saving preparation method for producing lime from fine limestone powder

A limestone and fine powder technology, which is applied in the field of fast and energy-saving preparation of lime from limestone fine powder, can solve the problems of high energy consumption and slow firing speed, and achieve the effects of reducing lime consumption, improving quality, and strong activity

Inactive Publication Date: 2019-02-12
遵义古匡坝建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can effectively solve the problems of slow burning speed and high energy consumption when burning lime in the existing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 100kg limestone, pulverize into powder, obtain limestone fine powder, the particle diameter of limestone fine powder is 0.01-1mm, set aside. Take 5kg of coal powder and 8kg of water respectively, and mix the coal powder and water evenly to obtain the additive.

[0027] The above-mentioned limestone fine powder and additives are mechanically or manually stirred to obtain a mixture, and then the mixture is sent to a pressing machine for pressing to obtain a limestone embryo body. The limestone embryo body is a cuboid, and a group of through holes are arranged on a group of parallel faces of the limestone embryo body.

[0028] Send the prepared limestone body into a shaft kiln for firing at 1100°C to obtain 60kg of lime, wherein the volume of the limestone body accounts for 80% of the kiln volume.

[0029] The whole firing process is about 2 hours, and the firing time is effectively shortened. At the same time, compared with the traditional method, which requires 50 ...

Embodiment 2

[0031] Get 100kg limestone, pulverize into powder, obtain limestone fine powder, the particle diameter of limestone fine powder is 0.01-3mm, set aside. Take 5kg of coal powder and 8kg of water respectively, and mix the coal powder and water evenly to obtain the additive.

[0032] The above-mentioned limestone fine powder and additives are mechanically or manually stirred to obtain a mixture, and then the mixture is sent to a pressing machine for pressing to obtain a limestone embryo body. The limestone embryo body is a cylinder, and a through hole is arranged in the axial direction of the cylinder.

[0033] The prepared limestone body is sent to the wheel kiln for preheating to 650°C, and then heated to 950°C for firing to obtain 65kg of lime, of which the volume of the limestone body accounts for 85% of the kiln volume.

[0034] The entire firing process is about 2.1 hours, and the firing time is effectively shortened. At the same time, compared with the traditional method,...

Embodiment 3

[0036] Get 100kg limestone, pulverize into powder, obtain limestone fine powder, the particle diameter of limestone fine powder is 0.01-2mm, set aside. Take 5kg of coal powder, 3.5kg of clay, and 7kg of water respectively, and mix the coal powder, clay, and water evenly to obtain the additive.

[0037] Take 100kg of fine limestone powder and 10kg of additives, stir the fine powder of limestone and the additives mechanically or manually to obtain a mixture, and then send the mixture into a press for pressing to obtain a limestone embryo body. The limestone embryo body is a cylinder, and a through hole is arranged in the axial direction of the cylinder.

[0038] The prepared limestone body is sent to the tunnel kiln for preheating to 550-600°C, and then heated to 1000-1050°C for firing to obtain 64kg of lime, of which the volume of the limestone body accounts for 92% of the kiln volume.

[0039] The whole firing process is about 1h45min, and the firing time is obviously shorter t...

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PUM

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Abstract

The invention discloses a quick energy-saving preparation method for producing lime from fine limestone powder and aims at solving the problems that when an existing method is applied to preparing thelime, a firing speed is slow, a yield is low, a thermal energy utilization rate is lower, energy consumption is higher, and a large amount of energy is wasted. The method comprises four steps: preparing the fine limestone powder, preparing an additive, preparing a limestone green body and firing. Compared with the existing lime firing method, the method disclosed by the invention can save time by30% or more, has obvious economical and social value and has obvious effects on reducing energy consumption and improving enterprise benefits; meanwhile, the prepared lime has higher activity, and the product quality is obviously improved.

Description

technical field [0001] The invention relates to the fields of chemical industry and smelting, in particular to a fast and energy-saving preparation method for producing lime from limestone fine powder. Background technique [0002] The main component of limestone is calcium carbonate, which can be directly fired into lime. The main component of lime is calcium oxide, which has been widely used in plastics, coatings, papermaking, steelmaking and other industries. For example, in steelmaking, adding limestone can simultaneously convert silicon dioxide in the ore into slag. One of the essential raw materials for steel. [0003] At present, when limestone is burned in the existing technology, limestone and coal need to be loaded into an earthen kiln in the order of one layer of limestone and one layer of coal, and then calcined at high temperature to obtain lime after calcining. However, when adopting this method to prepare lime, the burning speed is slow, the output is low, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
CPCC04B2/104
Inventor 肖金林
Owner 遵义古匡坝建材有限责任公司
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