The stone on the trash can is called stone rice or gravel. It is a pollution-free, non-radiation, environmentally friendly natural stone with good pressure resistance, wear resistance, corrosion resistance and other properties. Its main functions are:
1. It is used to extinguish smoke and prevent high-temperature cigarette butts from burning the surface of the trash can. At the same time, there is no need to press the cigarette butts, just squeeze the cigarette butts into the stone. Extinguishes quickly.
2. The second one is used to spit gum and spit to keep the surface of the trash can clean.
Extended information:
Other uses of gravel
1 Brick making
The content of active calcium oxide in carbide slag reaches 40% The above can replace lime to stimulate the activity of cinder (or coal ash), so the bricks made have a certain strength. By completely replacing lime with carbide slag, bricks with the same effect as using lime can be obtained, but the best blending amount is 30%. Cinder bricks and fly ash bricks produced using calcium carbide slag are generally between No. 130 and No. 150, and the best ones can reach No. 180 and No. 190.
The strength of this kind of brick is better than that of ordinary red bricks (ordinary red bricks are No. 70-150). The production process is simple, with only a few steps of batching, crushing, rolling, shaping, and steaming. The investment in building a factory is low and the results are quick.
2. Cement production
The carbide slag is first washed with water to remove the ferrosilicon blocks, and the upper layer of clean water is drained through sedimentation. The water content of the lower layer of thick slurry is about 66 to 70%. Coal, loess and iron slag are fed into the mud mill in a weight ratio of 16:16:5, and water is continuously added during the grinding process to produce a mud containing 54 to 98% water.
Then calcium carbide slag and mud are evenly mixed into a slurry containing 48±1% calcium oxide, which is dehydrated, dried and crushed, then shaped into balls of a certain size and sent to the vertical kiln for calcination and After crushing, it is ground into cement.
3. Making mortar and masonry ash
The chemical composition of carbide slag complies with the second-grade low magnesium lime standard. It can be mixed with cement and sand to form masonry mortar, which is called carbide slag. Cement mortar. Its compressive strength, anti-freeze performance, bonding force, softening coefficient value, etc. all meet the specified requirements.
Use carbide slag and lime mortar in a ratio of 9:1 to prepare hemp ash. Its water impermeability is better than that of lime plaster hemp ash, and its frost resistance, heat resistance and freeze-thaw performance are qualified.
4. Preparation of bleaching solution
Wash the carbide slag with equal amounts of water more than twice to remove stones and other impurities, and prepare an aqueous solution containing 12 to 15% calcium hydroxide. After two chlorinations, a bleaching solution containing more than 8% effective chlorine can be obtained. Preparing bleaching solution from carbide slag can save lime, but it has poor stability and should be used in time.
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