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Comprehonsive utilization method of asbestos tail ore

A kind of asbestos tailings and suitable technology, applied in the field of comprehensive utilization of asbestos tailings, can solve the problems of low comprehensive utilization rate and product grade, single extraction or utilization, etc., and achieve low comprehensive production cost, high comprehensive utilization rate and good product quality Effect

Inactive Publication Date: 2005-03-23
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disclosed asbestos tailings utilization technology is only a single extraction or utilization of a certain component or simple utilization, such as extraction of magnesium oxide or use as ingredients for cement and refractory materials, its comprehensive utilization rate and product grade are relatively high Low

Method used

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  • Comprehonsive utilization method of asbestos tail ore
  • Comprehonsive utilization method of asbestos tail ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] ① Take 100g of asbestos tailings powder and add 290g of 40% H 2 SO 4 , dissolved at 95°C for 1.5h; the solid residue was removed by filtration, and 3.6g of 30% H 2 o 2 , oxidize at 65°C for 45 minutes, adjust the pH value to 6, and sink for 45 minutes; filter and separate the iron hydroxide precipitate, adjust the Baume degree of the filtrate to 20°, add alkali to the pH value of 13 within 15 minutes, and the temperature is 95°C, add surface Treating agent (titanate YB301) 0.6%, stirring and aging for 40 minutes, filtering, washing and drying to obtain superfine magnesium hydroxide product.

[0042] Dry the iron hydroxide and calcinate it at 550°C for 0.5h in a laboratory muffle furnace to obtain the iron oxide product.

[0043] Add 22g NaOH to the acid-soluble solid residue, add 200mL water at the same time, dissolve at 95°C for 2h, filter to remove the residue, adjust the Baume degree of the filtrate to 18°, and add 4g NaOH 2 SO 4 , the temperature is 45°C, adjus...

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Abstract

A process for comprehensive utilization of asbestos tailings includes such steps as breaking, dissolving in acid, filtering, oxidizing filtrate, adding alkali, reaction, filtering to remove iron hydroxide, adding alkali and surface treating agent, reaction, filtering, drying, breaking to obtain superfine active magnesium hydroxide, dissolving dregs in alkaline solution, filtering, adding acid, depositing, adding isolating agent, agenig, filtering, washnig, drying, breaking to obtain superfine SiO2, calcining iron hydroxide to obtain iron oxide, mixing with mine tailings and assistant, and making color bricks.

Description

1. Technical field [0001] The invention relates to a method for comprehensive utilization of asbestos tailings, belonging to the fields of mineral processing and environmental protection. 2. Background technology [0002] At present, about 25 tons of asbestos tailings are produced for every ton of finished asbestos produced in asbestos production areas in western my country, and millions of tons of asbestos tailings are added every year. However, the existing asbestos tailings are seldom used, and a large number of asbestos tailings are abandoned, which poses a serious threat to the local ecological environment. Therefore, solving the comprehensive utilization of asbestos tailings piled up like mountains is one of the major challenges of environmental protection in asbestos-producing areas in western my country, and even in the entire western region. The disclosed asbestos tailings utilization technology is only a single extraction or utilization of a certain component or s...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 郑水林李杨刘福来朱多功李远王君慧
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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