Method of preparing calcium carbide using waste slag in acetylith production process
A calcium carbide and calcium carbide technology, which is applied in the field of calcium carbide production from the thermal energy of liquid calcium carbide, can solve problems such as environmental pollution, blockage of ventilation pipes, and limited calcium carbide slag, so as to reduce environmental pollution, reduce production costs, and shorten cooling time. Effect
Active Publication Date: 2006-09-06
YIBIN TIANYUAN GRP CO LTD
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Problems solved by technology
Coke powder is generally sold at a low price, and lime powder is generally stacked. Because lime powder has strong alkalinity, it causes environmental pollution.
In order to make good use of calcium carbide waste slag, the Chinese Patent Office has disclosed a production method of calcium carbide with the announcement number 1095750: it is to mix the powdered carbon raw material and quicklime raw material in a certain proportion, and first add a small part of the amount of quicklime that should be input. Sprinkle evenly in the furnace, and then mix the remaining quicklime raw materials and powdered carbon raw materials into the furnace evenly, and produce by closed-arc operation, but the biggest problem with this method is that it cannot be exhausted well, which is easy to cause The blockage of ventilation pipes and environmental pollution; in some cases, after the raw ash powder and coke powder are prepared, a layer of mixture is laid in the electric arc furnace before the production of calcium carbide to achieve the purpose of saving raw materials. The calcium carbide waste slag is very limited and cannot fundamentally solve the problem;
[0006] Before the present invention was proposed, those skilled in the field of calcium carbide production were perplexed by these two technical problems. How to solve these two problems simultaneously with a technical solution has become a bigger technical problem in this technical field. Any feasible technical solutions proposed
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Embodiment 1-5
[0019] First, the calcium oxide and carbon raw materials are broken into 5-30mm in size, and the calcium oxide with a diameter of more than 5mm and the carbon raw material with a diameter of more than 3mm are selected to prepare a mixture according to the molar ratio of calcium oxide: carbon raw materials at a ratio of 1:3. Add it into the calcium carbide furnace for heating reaction, when the generated calcium carbide becomes molten, it can be discharged into the calcium carbide pot;
[0020] According to the method described in the present invention, firstly add waste calcium oxide of 5-0.5mm and carbonaceous raw material below 3mm in molar ratio of 1:3 and mix, then grind the mixture into powder with a diameter of 0.3-0.01mm Then mix the mixed powder and press it into a block with a diameter of 2-40mm and a weight of about 2-200 grams, and put the aforementioned block directly into the molten liquid just out of the furnace that flows in the calcium carbide pot In the calciu...
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Abstract
A process for preparing the calcium carbide from the dregs generated in the production of calcium carbide by the heat energy of molten calcium carbide discharged from calcium carbide furnace includes such steps as proportionally mixing calcium oxide powder with carbon, grinding, making the blocks of mixture, and adding them to said molten calcium carbide.
Description
technical field [0001] The invention relates to a preparation method of calcium carbide, in particular to a method for producing calcium carbide by using waste slag in the calcium carbide production process as raw material and utilizing the heat energy of liquid calcium carbide discharged from a calcium carbide furnace. Background technique [0002] In the production process of calcium carbide, calcium carbide furnace materials are mainly quicklime and coke, and calcium carbide is generated after heating reaction, and the reaction equation is: [0003] <chemistry num="001"> <chem file="200410040577_cml001.xml" / > < / chemistry> [0004] In the production process of calcium carbide, a large amount of heat energy needs to be consumed, and the required heat energy is obtained by converting electric energy, so a large amount of electric energy is consumed. It takes about 3500kwh to produce one ton of calcium carbide, and the electric energy consumed is much hi...
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IPC IPC(8): C01B31/32B09B3/00B08B3/00C01B32/942
Inventor 罗云明崇伦宋佳河
Owner YIBIN TIANYUAN GRP CO LTD