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Nonmetal grinding medium for cement grinding, and application thereof

A grinding medium and non-metal technology, which is applied in the field of cement grinding, can solve the problems of not finding non-metal grinding media, the proportion of metal grinding media is large, and the energy saving requirements cannot be met, so as to achieve good economic benefits, reduce electrostatic adsorption, prevent The effect of static electricity

Inactive Publication Date: 2015-08-19
朱晖 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effects described by this patented inventions are improved power savings during production while maintaining excellent performance properties such as durability against wear or impact resistance. This results from replacing metals instead of plasma lamps used in conventional methods like crushing calcium carbonate (C) or sintered silicon carbide (Si). Additionally, there're no negative side effects on the final product made through these processes.

Problems solved by technology

This patented technical problem addressed by this patents relates to improving the performance of metals grounding tools during cement production processes due to their low resistance against electrostatic charges generated from other objects like iron particles. Additionally, there may also exist concerns about potential cracks caused by these substances themselves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Use alumina micropowder as the main raw material, grind it to 800 mesh, roll it into a ball forming machine to the specified size, and calcinate it to 1500 degrees to obtain Al 2 o 3 Alumina ceramic balls with a content of 95 wt%. The bulk density of gained alumina ceramic ball is 3.8g / cm 3 , the compressive strength is higher than 2000Mpa, and the Mohs hardness is above 8.

[0029] In the ф3.2×13m three-chamber cement ball mill, the alumina ceramic balls prepared above were replaced with the metal grinding medium in the third warehouse. Calculated at a filling rate of 35%, the original loading capacity of the metal grinding medium was 91 tons. The average power consumption per ton of cement is about 38kW·h; the use of alumina ceramic balls is 38 tons, of which 8 tons with a diameter of 20mm, 22 tons with a diameter of 30mm, and 8 tons with a diameter of 40mm are controlled by a mill to grind with metal Compared with the medium, the grinding efficiency of the mill is...

Embodiment 2

[0031] Use alumina micropowder as the main raw material, grind it to 800 mesh, press it through a press, the molding pressure is 100Mpa, the molding size is a forged shape with a diameter of 20mm and a length of 25mm, and calcined to 1520 degrees to obtain Al 2 o 3 Alumina ceramic wrought with a content of 92 wt%. The bulk density of the obtained alumina ceramic forging is 4.5g / cm 3 , the compressive strength is higher than 2100Mpa, and the Mohs hardness is above 8.

[0032] In the ф3.0×11m cement ball mill in the second warehouse, the above-mentioned alumina ceramic forging is used to replace the metal grinding media in the second warehouse. Calculated at a filling rate of 33%, the original loading capacity of the metal grinding media is 60 tons. The average power consumption per ton of cement is about 38kW·h; alumina ceramics are used to forge 35 tons. By cooperating with the mill control, compared with the metal grinding media, the grinding efficiency of the mill is basic...

Embodiment 3

[0034] Using bauxite ore as the main raw material, grind it to 800 mesh, roll it to the specified size through a ball forming machine, and calcinate it to 1400 degrees to obtain Al 2 o 3 Alumina ceramic balls with a content of 55 wt%. The bulk density of gained alumina ceramic ball is 4.4g / cm 3 , the compressive strength is higher than 1200Mpa, and the Mohs hardness is above 7.

[0035] In the ф3.8×13m second warehouse cement ball mill, the alumina ceramic balls prepared above are replaced with the metal grinding media in the second warehouse. Calculated at a filling rate of 32%, the original metal grinding media loading capacity is 160 tons, and the cement The average power consumption is about 38kW·h; the use of the above-mentioned alumina ceramic balls is 90 tons, of which 15 tons with a diameter of 20mm, 50 tons with a diameter of 30mm, and 25 tons with a diameter of 40mm are controlled by a mill and matched with metal grinding media. Compared with that, the grinding ef...

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Abstract

The invention relates to the field of cement grinding, and concretely relates to a nonmetal grinding medium for cement grinding, and an application thereof. The nonmetal grinding medium for cement grinding is prepared from alumina or bauxite as a main raw material through burdening, molding and calcining; and the content of Al2O3 in the nonmetal grinding medium is 50-98wt%, the compressive strength of the medium is greater than 1000Mpa, and the Mohs hardness of the medium reaches above 7. The nonmetal grinding medium has the following advantages: 1, the power consumption of a grinding machine can be substantially reduced, so energy saving and consumption reduction are reached; 2, generation of static electricity is prevented, electrostatic adsorption is reduced, and the grinding efficiency is improved; and 3, the nonmetal grinding medium is prepared by adopting alumina as the main component, has high strength and has a micro-powder filling effect, so the quality of cement is not influenced even a small amount of particles shed and fall into the cement.

Description

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Claims

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Application Information

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Owner 朱晖
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