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Waste acid and wastewater treatment process in processes of pickling and purifying quartz or feldspar

A technology for wastewater treatment and feldspar, applied in the directions of ferric sulfate, calcium/strontium/barium sulfate, chlorine/hydrogen chloride, etc., can solve problems such as the inability to truly achieve zero discharge, zero pollution, and inability to solve the problem of calcium chloride in wastewater

Active Publication Date: 2014-07-30
田辉明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot solve the calcium chloride contained in the wastewater, and cannot truly achieve zero discharge and zero pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] After the quartz or feldspar particles are washed dynamically with hydrochloric acid countercurrent, the acid solution after washing is recovered, and the concentration of hydrochloric acid in the acid solution and the mass percentage concentration of iron ions are detected. When the mass percentage concentration of iron ions is ≤0.5%, if the acid solution contains The concentration of hydrochloric acid is ≥18%, and the acid solution is recycled directly. If the acid solution is 15%≤hydrochloric acid concentration<18%, then add 30% hydrochloric acid to the acid solution to make the concentration of hydrochloric acid in the acid solution ≥18%, and then circulate Apply mechanically until the concentration of hydrochloric acid in the acid solution is less than 15% or when the mass percentage concentration of iron ions is greater than 0.5%, it becomes waste acid. After the waste acid is cooled to normal temperature, the waste acid is treated with anion and cation resins to re...

Embodiment 2

[0024] After the quartz or feldspar particles are washed dynamically with hydrochloric acid, recover the acid solution after washing, and detect the concentration of hydrochloric acid in the acid solution and the mass percentage concentration of iron ions. If the concentration of hydrochloric acid in the acid solution is ≥18% and the mass percentage of iron ions is When the concentration is less than or equal to 0.5%, the acid solution is recycled directly. If the acid solution is 15%≤hydrochloric acid concentration<18% and the mass percentage concentration of iron ions is less than or equal to 0.5%, add 30% hydrochloric acid to the acid solution to make the acid The concentration of hydrochloric acid in the solution is ≥ 18%, and then it is recycled until the mass percentage concentration of iron ions in the acid solution is greater than 0.5% or the concentration of hydrochloric acid is less than 15%, and it becomes waste acid. After the waste acid is cooled to normal temperatu...

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Abstract

The invention discloses a waste acid and wastewater treatment process in processes of pickling and purifying quartz or feldspar. The process comprises three steps of treatment of the waste acid, treatment of washing water and treatment of wastewater. The waste acid is processed by cation-anion resin, the washing water is fed to a neutralizing tank to process by using lime milk, the wastewater is processed by a concentrated sulfuric acid, and the waste acid and the wastewater generated in the processes of pickling and purifying the quartz or feldspar are completely recycled and applied in cycle. Especially, the wastewater containing calcium chloride which cannot be removed by the prior art is successfully processed, and zero pollution and zero emission are really achieved.

Description

technical field [0001] The invention relates to a process for treating waste acid and waste water in the process of pickling and purifying quartz or feldspar, and belongs to the technical field of chemical purification and environmental protection. Background technique [0002] Quartz and feldspar are two very important non-metallic mineral raw materials, which are often used as raw materials in the glass, ceramic and refractory industries. The mineral impurities they contain are mainly ferric oxide, but due to the different conditions in the formation process, the content of the impurity mineral ferric oxide is also different, and their grades determine their use in different types of glass, ceramics and Application and dosage in the refractory industry. With the continuous development of society and the continuous progress of science and technology, while enjoying the happy life brought by the application of scientific and technological achievements, people also put forwa...

Claims

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Application Information

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IPC IPC(8): C01G49/14C01F11/46C01B7/03
Inventor 田辉明
Owner 田辉明
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