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Raw material for preparing barium sulfate and method for preparing barium sulfate by recycling waste barium mud

A technology of barium sulfate and barium mud, which is applied in the direction of chemical instruments and methods, calcium/strontium/barium sulfate, calcium/strontium/barium compounds, etc., can solve the problems of using, being difficult to use, and not being able to be used as products, so as to reduce production cost effect

Inactive Publication Date: 2019-03-29
湖北谷城新和有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, various storage tanks are widely used in the precipitated barium sulfate industry. In the compounding process and drying process, the barium sulfate slurry needs to be buffered and stored in the storage tank. In the evaporation process, 5% sulfide lye and 20% sulfide Clarification in the clarification tank will produce certain barium sulfate precipitates, and the mass percentage of these precipitates containing barium sulfate is 89-94%, but because of its darker color and impurity contamination, it cannot be used as a product. For a long time, these The waste barium mud is discarded, it is difficult to use, and it also causes certain environmental problems

Method used

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  • Raw material for preparing barium sulfate and method for preparing barium sulfate by recycling waste barium mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The waste barium sludge from the bottom of the lye storage tank and lye clarification tank in the chemical compound workshop was piled up in the rain shelter yard for 90 days.

[0033] S1, air-dry the waste barium mud to a moisture content of 15%, and add coke powder with a mass percentage of 20% and a carbon content of 80% to the waste barium mud;

[0034] S2, putting the mixed material into a pulverizer for pulverization, placing the pulverized material in a ceramic crucible, and roasting at 1000° C. for 1 hour to obtain barium sulfide black ash;

[0035] S3, leaching the barium sulfide black ash obtained by roasting with condensed water, the leaching temperature is 75°C, and the leaching time is 60min;

[0036] S4, adding a flocculant with a solution mass percentage of 0.02% to the barium sulfide solution, the flocculant is aluminum sulfate;

[0037] S5, adding a 20% sodium sulfate solution with a mass percentage of 20% by precision filter paper to S4, and heating t...

Embodiment 2

[0060] The waste barium mud from the bottom of the lye storage tank and lye clarification tank of the chemical compound workshop is piled up in the rain shelter yard for 120 days.

[0061] S1, air-drying the waste barium mud to a water content of 12%, adding coke powder with a mass percentage of 33% and a carbon content of 83% to the waste barium mud;

[0062] S2, putting the mixed material into a pulverizer for pulverization, placing the pulverized material in a ceramic crucible, and roasting at 1050° C. for 75 minutes to obtain barium sulfide black ash;

[0063] S3, leaching the barium sulfide black ash obtained by roasting with condensed water, the leaching temperature is 78°C, and the leaching time is 75min;

[0064] S4, adding a flocculant with a solution mass percentage of 0.05% to the barium sulfide solution, the flocculant is aluminum sulfate;

[0065] S5, adding a 23% sodium sulfate solution with a mass percentage of 23% through precision filter paper to S4, and heatin...

Embodiment 3

[0088] The waste barium mud from the bottom of the lye storage tank and lye clarification tank in the chemical compound workshop is piled up in the rain shelter yard for 150 days.

[0089] S1, air-drying the waste barium mud to a water content of 10%, adding coke powder with a mass percentage of 38% and a carbon content of 85% to the waste barium mud;

[0090] S2, putting the mixed material into a pulverizer for pulverization, placing the pulverized material in a ceramic crucible, and roasting at 1150° C. for 1.5 hours to obtain barium sulfide black ash;

[0091] S3, leaching the barium sulfide black ash obtained by roasting with condensed water, the leaching temperature is 80°C, and the leaching time is 90min;

[0092] S4, adding a flocculant with a solution mass percentage of 0.1% to the barium sulfide solution, the flocculant is aluminum sulfate;

[0093] S5, adding a 25% sodium sulfate solution with a mass percentage of 25% by precision filter paper to S4, and heating to ...

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Abstract

The invention provides a method for preparing barium sulfate by recycling waste barium mud. The waste barium mud on the bottom of alkali solution storage tank and alkali solution clarifying tank in acompounding workshop is used as a raw material, so that the problems of space occupation and various pollutions to environment caused by the accumulated waste barium mud can be solved; the waste barium mud and coke dust can be calcined for regenerating barium sulfide which can be used as the raw material for producing barium sulfate; mass percent of barium sulfate in waste barium mud reaches up to96% or above, so that barium sulfide black ash with purity reaching up to 85% can be acquired through the reaction of waste barium mud and high-quality coke dust, and the barium sulfide content of the barium sulfide black ash is about 30% higher than that of the barium sulfide black ash acquired by calcining barite; according to the invention, waste barium mud is recycled, waste is turned into wealth and the method is economical and environment-friendly, so that a new method is supplied for solving the problem of solid waste emission in the industry of barium salt production and the production cost of enterprises can be greatly lowered.

Description

technical field [0001] The invention relates to the field of chemical waste residue treatment, in particular to a method for preparing barium sulfate by recovering waste barium sludge. Background technique [0002] The mineral of barium sulfate is called barite, which is a white amorphous powder with stable properties and hardly soluble in water, acid, alkali or organic solvent. In medical treatment, the use of barium sulfate in radiological examination mainly utilizes its ability to absorb X-rays in the gastrointestinal tract to develop it, so it is mainly used as a contrast agent for the gastrointestinal tract; industrially, it can be used as paint, ink, plastic, Raw materials and fillers for rubber and batteries, surface coating agents for printing paper and art paper; used as a sizing agent in the textile industry; used as a clarifying agent in glass products, which can defoam and increase gloss; can be used as Protective wall material for radiation; it can also be used...

Claims

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Application Information

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IPC IPC(8): C01F11/46
CPCC01F11/462C01P2006/60C01P2006/63C01P2006/64C01P2006/80
Inventor 赵卓成李盛龙付荣华赵国旗彭斌陈瑶
Owner 湖北谷城新和有限公司
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