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Organic binder prepared from kitchen wastes as raw materials for pellets

A technology of organic binder and kitchen waste, applied in the field of organic binder, to achieve the effect of improving capacity, reducing pig iron smelting cost, and reducing coke ratio

Inactive Publication Date: 2012-05-23
BEIJING JUNZHIQING SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to seek a more valuable application of kitchen waste and reduce the discharge of pollutants; to provide a new type of pellet production with wide sources, low price, small residue and good pellet performance. Organic binder, which can completely or partially replace the existing binder, improve the grade and metallurgical properties of the furnace ore, reduce ironmaking costs and resource consumption, and make full use of the calorific value of kitchen waste , to reduce the energy consumption of pellet production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Preparation of organic binder

[0037] Boil the collected food waste, scrape off the slick oil on the upper layer, beat it, remove the hard solids such as wood, plastic, glass fragments, ceramic fragments, shells and metal solids, then dry it, grind it into powder, micro The organic binder has a moisture content of 0.66% by weight and an ash content of 5.93% by weight.

[0038] The ash content of organic binders prepared from kitchen waste is much lower than that of traditional inorganic binders. Commonly used inorganic binders such as bentonite after roasting, about 90% remain in the finished pellets, reducing the iron grade of the pellets. However, the organic binder of the present invention has very little residual ash after being roasted. It can be seen that the use of the organic binder of the present invention is beneficial to improving the iron grade of the pellets.

Embodiment 2

[0039] Example 2 Preparation of Pellets Using Organic Binder

[0040] With the iron ore concentrate of Shougang Mining Company's Shuichang Iron Ore Concentrator as raw material, add 1.5% by weight of the organic binder of Example 1 and 0.5% by weight of bentonite used in the production of Shougang Mining Company's pellet plant for batching, after mixing Make pellets, screen out green pellets with qualified particle size to measure the compressive strength and drop strength of green pellets, and measure the moisture content after drying. Take a certain amount of qualified green balls to measure the burst temperature. Take a certain amount of qualified green balls and dry them at 105°C for 2 hours, put them into the shaft furnace, put them into the preheating section and preheat them at 950°C for 10 minutes, then put them into the roasting section and roast them at 1250°C for 10 minutes, take them out and cool them Measure the compressive strength of roasted balls.

[0041] Th...

Embodiment 3

[0042] Example 3 Preparation of Pellets Using Organic Binder

[0043] With the iron ore concentrate of Shougang Mining Company's Shuichang Iron Ore Concentrator as raw material, add 2% by weight of the organic binder of Example 1 and 0.5% by weight of the bentonite used in the production of Shougang Mining Company's pellet plant for batching, after mixing Make pellets, screen out green pellets with qualified particle size to measure the compressive strength and drop strength of green pellets, and measure the moisture content after drying. Take a certain amount of qualified green balls to measure the burst temperature. Take a certain amount of qualified green balls and dry them at 105°C for 2 hours, put them into the shaft furnace, put them into the preheating section and preheat them at 950°C for 10 minutes, then put them into the roasting section and roast them at 1250°C for 10 minutes, take them out and cool them Measure the compressive strength of roasted balls.

[0044] ...

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Abstract

The invention relates to an organic binder prepared from kitchen wastes as raw materials for pellets. The binder comprises the processed kitchen wastes. A method for processing the kitchen wastes comprises the following steps of: boiling the collected kitchen wastes, scraping to remove floating oil on an upper layer, pulping, removing wood, plastic, glass fragments, ceramic fragments, shells, metal solids and other rigid impurities in pulp, drying and grinding into powder. By utilization of the organic binder disclosed by the invention for producing the pellets, the pellets as fired are increased in grade and metallurgy performance, the ironmaking cost is further reduced, the resource consumption and the energy consumption are reduced, the emission of pollutants is reduced, and the competitive power of steel and iron materials and products of China in the international market is increased.

Description

technical field [0001] The invention relates to an organic binder, in particular to an organic binder for pellets which can be used in pellet production and prepared from kitchen waste. Background technique [0002] At present, the iron-containing raw materials used in the ironmaking industry mainly include natural lump ore, sintered ore and pelletized ore. With the development of large-scale blast furnaces, the requirements for raw materials entering the furnace are getting higher and higher. Whether it is chemical composition, metallurgical properties, or particle size composition, further improvement is required. Countries with developed iron and steel industries are earnestly preparing raw materials for ironmaking and providing high-quality artificial lump ore to ensure smooth operation of blast furnaces, reduce coke ratio, and increase utilization factor. [0003] Compared with the world's advanced level, there is still a relatively large gap between the technical and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244
CPCY02P10/20
Inventor 王化军马鸿志葛鹏何秋慧陶娟娟程鑫
Owner BEIJING JUNZHIQING SCI & TECH