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Method for pressing semicoke powder used for producing calcium carbide

A compression molding, calcium carbide technology, applied in the petroleum industry, solid fuel, fuel and other directions, can solve the problems of difficult temperature, unreachable, low heat energy utilization rate, etc.

Inactive Publication Date: 2010-08-04
丹江口福安运输有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. The temperature is difficult to control and it is easy to catch fire; 2. The drying effect is not good, and it cannot meet our requirement of less than 5% moisture content; 3. The drying equipment is complicated to operate and difficult to clean; 4. The utilization rate of heat energy is low

Method used

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  • Method for pressing semicoke powder used for producing calcium carbide
  • Method for pressing semicoke powder used for producing calcium carbide

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Embodiment Construction

[0028] The present invention mixes 82%-91% blue charcoal powder, 3%-9% additive fat coal and 2%-11% binder by weight percentage, and adds the mixture to a mixer at normal temperature for mixing and stirring for 2- The stirring time is about 5 minutes, and finally the ball is pressed into shape, and the finished product is finished after drying.

[0029] The adhesive is mixed with 20-30% caustic soda sodium hydroxide solution, 20-30% urea solution, and 40-60% cornstarch by weight percentage, and 60°C-80°C hot water is added when mixing That is, the blue charcoal powder molding adhesive; wherein the concentration of sodium hydroxide solution is 0.1%-5%, and the concentration of urea solution is 0.1%-5%. Add less hot water than cornstarch, and when combined, the mixture should be thick enough.

[0030] JS500 forced mixer is selected, and the mixture of pulverized semi-coal powder, fat coal and binder is stirred for about 2-5 minutes at room temperature, so that the content of bi...

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Abstract

The invention discloses a method for pressing semicoke powder used for producing calcium carbide, which comprise: mixing 82 to 91 weight percent of semicoke powder, 7 to 9 weight percent of additive and 2 to11 weight percent of binder, adding the mixture into a stirrer to stir the mixture at room temperature for 2 to 5 minutes, processing and forming the mixture, drying the formed product to obtained the finished product, wherein the additive is rich coal; the binder for forming the semicoke powder is prepared by mixing 20 to 30 weight percent of solution of sodium hydroxide, 20 to 30 weight percent of solution of urea and 40 to 60 weight percent of corn starch and by adding hot water at 60 to 80 DEG C during mixing; and the concentration of the solution of sodium hydroxide is 0.1 to 5 percent and the concentration of the solution of urea is 0.1 to 5 percent. The product of the invention has high cold strength, can be fed in a furnace in batch in place of semicoke, avoids the yield and quality of smelted calcium carbide, reduces the production cost of the calcium carbide, improves resources utilization rate and has high use and promotion values.

Description

technical field [0001] The invention relates to the field of calcium carbide production, in particular to a method for pressing blue carbon powder for calcium carbide production. Background technique [0002] With its high fixed carbon, high specific resistance, high chemical activity, low ash, low sulfur and low phosphorus characteristics, semi-coke has gradually replaced metallurgical coke and is widely used in calcium carbide, metal silicon, ferroalloy, ferrosilicon, silicon carbide, chromium Production of iron, fertilizers and other products. However, 30% of coke powder will be produced during production, crushing, transshipment, loading and unloading, and use. Due to its non-bonding and easy pulverization properties, it cannot be fully utilized and can only be used as low-grade fuels such as electric coal and civil use. For semi-coke powder less than 4mm, it can only be sold at a reduced price, which is a huge waste. Therefore, in today’s energy shortage, using semi-co...

Claims

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Application Information

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IPC IPC(8): C10L5/02C10L5/04
Inventor 王志文张麟郭丹师永丹张纯浩王敏
Owner 丹江口福安运输有限责任公司
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