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Method for preparing barium chloride from calcium-containing witherite ore

A technology of witherite and barium chloride, which is applied in the field of producing barium chloride from calcium witherite ore, can solve the problems of low output, excessive calcium chloride content, large steam consumption and large power consumption, and achieve high solid purity and easy operation. Simple, pure effect

Inactive Publication Date: 2019-01-29
宜昌华昊新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for producing barium chloride from calcium witherite ore, which has the advantage of using high-calcium witherite ore to produce barium chloride with high purity, and solves the problem of conventional production methods. The ore is reacted with hydrochloric acid to obtain a mixed liquid of barium chloride and calcium chloride, and then barium chloride is produced by evaporation and crystallization, and the reaction liquid is evaporated and crystallized, and the content of calcium chloride in the produced barium chloride will seriously exceed the standard , can not meet the corresponding national quality standards, and the output is low, the steam consumption and electric energy consumption per unit product are large, which increases the cost of the product, resulting in this kind of witherite mine with high calcium content, which is basically uninterested, and the resources cannot be effectively used question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment one: the method for producing barium chloride from calcite ore comprises the following steps:

[0017] 1) Put 40-mesh witherite into a reaction vessel with stirring function, pour 24% hydrochloric acid into the reaction vessel with a ratio of 3:1 to react with witherite, and react with witherite in hydrochloric acid and witherite Continue heating from 0°C to 80°C during the heating process, control the reaction temperature during the heating process, keep the temperature at 30°C for 0.5 hours, and control the stirring speed at the same time to keep the stirring speed at 0r.min;

[0018] 2) When the impurity content of calcium, magnesium and iron inside the witherite is high, slaked lime and solution can be used to form double salt and precipitate under certain pH conditions, and other hydroxides and double salt can be precipitated together to achieve the effect of impurity removal , a large amount of Ca(OH) is produced after adding slaked lime to the solution...

Embodiment 2

[0027] Embodiment two: the method for producing barium chloride from calcite ore comprises the following steps:

[0028] 1) Put 130-mesh witherite into a reaction vessel with stirring function, pour 24% hydrochloric acid into the reaction vessel with a ratio of 3:1 to react with witherite, and react with witherite in hydrochloric acid and witherite Continue heating from 0°C to 80°C during the heating process, control the reaction temperature during the heating process, keep the temperature at 30°C for 0.5 hours, and control the stirring speed at the same time to keep the stirring speed at 0r.min;

[0029] 2) When the impurity content of calcium, magnesium and iron inside the witherite is high, slaked lime and solution can be used to form double salt and precipitate under certain pH conditions, and other hydroxides and double salt can be precipitated together to achieve the effect of impurity removal , a large amount of Ca(OH) is produced after adding slaked lime to the solutio...

Embodiment 3

[0038] Embodiment three: the method for producing barium chloride from calcite ore comprises the following steps:

[0039] 1) Put 130-mesh witherite into a reaction vessel with stirring function, pour 30% hydrochloric acid into the reaction vessel with a ratio of 3:1 to react with witherite, and react with witherite in hydrochloric acid and witherite Continue heating from 0°C to 80°C during the heating process, control the reaction temperature during the heating process, keep the temperature at 30°C for 0.5 hours, and control the stirring speed at the same time to keep the stirring speed at 0r.min;

[0040] 2) When the impurity content of calcium, magnesium and iron inside the witherite is high, slaked lime and solution can be used to form double salt and precipitate under certain pH conditions, and other hydroxides and double salt can be precipitated together to achieve the effect of impurity removal , a large amount of Ca(OH) is produced after adding slaked lime to the solut...

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Abstract

The invention relates to the technical field of witherite, and discloses a method for preparing barium chloride from calcium-containing witherite ore. The method comprises the following steps: placing40-to-300-mesh witherite into a reaction vessel with a stirring function, pouring hydrochloric acid with a concentration of 24% to 36% into the reaction vessel, allowing the hydrochloric acid to react with the witherite in a ratio of 3: 1 to 5: 1, continuing heating from 0 DEG C to 80 DEG C in the reaction process of the hydrochloric acid and the witherite, controlling the temperature of the reaction during heating, maintaining the temperature at 30 DEG C to 75 DEG C, carrying out a reaction for 0.5 to 3 hours, and controlling and maintaining the speed of stirring at 0 r.min to 600 r.min at the same time. The method for preparing the barium chloride from the calcium-containing witherite ore provided by the invention has the following advantages: through a plurality of times of tests on the ore size, hydrochloric acid concentration, liquid-solid ratio, heating temperature, reaction time and stirring speed of the witherite, an optimal preparation scheme is selected; a product obtained by using the preparation scheme provided by the invention has high purity and large yield; a large amount of the witherite with high calcium content can be utilized; and production is more environmentally-friendly.

Description

technical field [0001] The invention relates to the technical field of witherite, in particular to a method for preparing barium chloride from witherite ore. Background technique [0002] Witherite acidification process produces barium chloride. In order to ensure product quality, witherite with low calcium, low strontium and barium carbonate content of more than 60% is generally used for production. However, with the continuous increase of mining volume, the reserves of high-quality ore are getting less and less , witherite with low grade and calcium carbonate content greater than 25% has a large amount, and is mainly distributed around Ankang City, Shaanxi Province. The surface of this ore is gray, off-white or white, and the content of barium carbonate is between 40% and 55%. Content between 25%-30% [0003] CN 104891549 B patent uses a conventional production method to react the ore with hydrochloric acid to obtain a mixed liquid of barium chloride and calcium chloride,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/28
CPCC01F11/28C01P2006/80
Inventor 林福平
Owner 宜昌华昊新材料科技有限公司
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