Unlock instant, AI-driven research and patent intelligence for your innovation.

Limestone mud cake back production auxiliary material and its preparation process

A preparation process and limestone technology, applied in the direction of manufacturing converters, etc., can solve problems such as difficulty in recycling limestone mud cakes, and achieve the effects of reducing mining and calcination, improving environmental protection benefits, and reducing greenhouse gas emissions.

Active Publication Date: 2019-01-22
MCC BAOSTEEL TECH SERVICE
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of limestone mud cake back production auxiliary material and preparation technology thereof, be used for solving the difficult problem of limestone mud cake recovery in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) For the primary drying of limestone mud cake, use the loader to adopt the mode of overturning in the mud cake yard to reduce the moisture content of the mud cake, so that the mud cake changes from lumpy to powdery, and the moisture content is 8wt% to ensure that it meets the production requirements Require;

[0042] (2) The limestone mud cake after drying is transported to the production line by vehicle and put into the raw material bin; according to the production needs, the limestone mud cake is prepared from the bin and put into the crushing and mixing machine for crushing and stirring. Water glass dilute solution spray, mud cake and water glass are fully mixed by stirring, obtain the mixture of water glass and mud cake (contain sodium silicate (Na 2 O.3SiO 2 ) and the mass ratio of limestone mud cake is 1:64);

[0043] (3) Ball briquetting process: the raw materials mixed with water glass are conveyed to the hopper above the briquetting machine through the bel...

Embodiment 2

[0048] (1) For the primary drying of limestone mud cake, use the loader to adopt the mode of overturning in the mud cake yard to reduce the moisture content of the mud cake, so that the mud cake changes from lumpy to powdery, and the moisture content is measured at 10wt%, to ensure that it meets the production requirements Require;

[0049] (2) The limestone mud cake after drying is transported to the production line by vehicle and put into the raw material bin; according to the production needs, the limestone mud cake is prepared from the bin and put into the crushing and mixing machine for crushing and stirring. Water glass dilute solution spray, mud cake and water glass are fully mixed by stirring, obtain the mixture of water glass and mud cake (sodium silicate (Na silicate (Na) in the mixture 2 O.3SiO 2 ) and the mass ratio of limestone mud cake is 1:50);

[0050] (3) Ball briquetting process: the raw materials mixed with water glass are conveyed to the hopper above the ...

Embodiment 3

[0055] (1) For the primary drying of limestone mud cake, use the loader to adopt the mode of overturning in the mud cake yard to reduce the moisture content of the mud cake, so that the mud cake changes from lumpy to powdery, and the moisture content is 7wt% to ensure that the production requirements are met. Require;

[0056] (2) The limestone mud cake after drying is transported to the production line by vehicle and put into the raw material bin; according to the production needs, the limestone mud cake is prepared from the bin and put into the crushing and mixing machine for crushing and stirring. Water glass dilute solution spray, mud cake and water glass are fully mixed by stirring, obtain the mixture of water glass and mud cake (sodium silicate (Na silicate (Na) in the mixture 2 O.3SiO 2 ) and the mass ratio of limestone mud cake is 1:38);

[0057] (3) Ball briquetting process: the raw materials mixed with water glass are conveyed to the hopper above the briquetting ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a limestone mud cake re-production auxiliary material and a preparation technique thereof; the preparation technique at least includes the following steps: (1), drying the a limestone mud cake once; (2), breaking and mixing: placing the limestone mud cake in a mixer to crush and mix; adding sodium silicate solution and preparing a mixture; (3), pressing and shaping; (4), drying the limestone mud cake for the second time. The preparation method can effectively realize the reuse of the limestone mud cake and achieve the purpose of recycling waste materials.

Description

technical field [0001] The invention relates to an auxiliary material for limestone mud cake recycling and a preparation process thereof. Background technique [0002] In converter smelting, in order to facilitate desiliconization, desulfurization, dephosphorization, and shorten the smelting cycle, metallurgical lime is often used to quickly form slag, which can also protect the furnace lining. [0003] For example, the roasting branch of Baosteel Steelmaking Plant will produce limestone mud cakes during the production of quicklime, with an average daily output of 100 tons of limestone mud cakes. For this reason, Baosteel’s annual sewage disposal costs for mud cake waste exceed 20 million yuan. Limestone mud cakes mainly The composition is similar to that of limestone, and theoretically it can be used as a slagging agent for steelmaking for recycling. However, because it is a product of water washing and dust removal, its particle size is extremely fine, its viscosity is hig...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/36C04B28/26
CPCC04B14/28C04B28/26C21C5/36
Inventor 陆永刚董琦张有军郑仕兵李洋
Owner MCC BAOSTEEL TECH SERVICE