Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing manganese dioxide from titanium dioxide waste acid

A technology of manganese dioxide and titanium white waste acid, applied in the field of metallurgical chemistry, to achieve the effects of reducing energy consumption, low liquid-solid ratio, and broad application prospects

Active Publication Date: 2015-01-21
PANZHIHUA LIYU MINING
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no report on the production of manganese dioxide with titanium dioxide waste acid. The production of manganese dioxide with titanium dioxide waste acid can completely solve the problem of waste acid treatment in the production process of titanium dioxide, greatly reduce production costs, and promote the production of titanium dioxide. Healthy and rapid development of the white industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment one adopts the inventive method to prepare manganese dioxide

[0045]1a. Put 11kg of pyrolusite (containing 39.03% manganese), 3kg of pyrite (containing 41% of sulfur), and 30L of titanium white waste acid (containing 20% ​​of sulfuric acid, 30g / L of iron) into the reactor for reaction leaching. Add water in the process to make up for the evaporated water, maintain the liquid-solid ratio balance, and filter when the reaction pH reaches 2. 1b. Add 13kg pyrolusite (containing 39.03% manganese) and 4kg pyrite (containing 41% sulfur) to the filtrate to react to a pH value of 5.0, then add a certain amount of dilute ammonia water (containing 8%) to adjust the pH value to 6.2-6.4, Hold for 3 hours, filter, and go to step 2;

[0046] In the next round of reaction, add waste titanium dioxide acid (liquid-solid weight ratio 3:1) to the filter residue obtained in step 1b to react in the reactor, add water during the reaction to make up for the evaporated water, and ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing manganese dioxide, which belongs to the field of metallurgical chemistry, and has the characteristics of low production cost and environment protection. The method comprises the following steps of: a, mixing titanium dioxide waste acid, manganese ore containing manganese dioxide, and pyrite in a certain ratio, heating to 60-100 DEG C for reacting, filtering when pH value is 2; b, mixing the filtrate, manganese ore containing manganese dioxide, and pyrite in a certain ratio, heating to 60-100 DEG C, reacting, adding dilute ammonia solution to adjust the pH value to 6.2-6.4 when the pH value is 5, keeping the pH value for 1-6 hours, and then filtering in a thermal state; c, adding sulphide in the filtrate, reacting and then filtering, standing the filtrate, and then finely filtering; and d, adding ammonia solution in the fine filtrate to adjust the pH value to 12, then obtaining a manganese hydroxide solid, and calcining, washing and drying to finally obtain the product, namely manganese dioxide. The invention provides a new preparation way of manganese dioxide and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of metallurgical chemistry, and in particular relates to a new method for preparing manganese dioxide from titanium white waste acid. Background technique [0002] Titanium dioxide waste acid is the waste produced by the production of titanium dioxide by sulfuric acid method. For every ton of titanium dioxide produced, 8-10 tons of waste acid containing about 20% sulfuric acid and 15-25% ferrous sulfate will be discharged. These waste acids need to be neutralized before they can be discharged, which will lead to great pressure on the environmental protection of titanium dioxide manufacturers and a substantial increase in production costs. On the other hand, the production of manganese dioxide by the two-mine method requires a large amount of sulfuric acid. If the two can be combined, not only the environmental protection problem is solved, but also the economic benefits are considerable. [0003] At present, there is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02
Inventor 关晓伟何德武高立民桑曙光方国军李孝阳昝林寒汪云华刘刚余先进赵家春
Owner PANZHIHUA LIYU MINING