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A kind of method for preparing forsterite from olivine ore

A technology for olivine ore and forsterite, applied in the field of preparing forsterite from new olivine ore, can solve the problems of low utilization rate and inability to be directly applied in industry

Active Publication Date: 2015-08-05
新疆世全黄金矿业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although our country is rich in resources, but the alteration is serious, the unaltered olivine MgO ≥ 44%, the ignition loss 8%, especially hundreds of millions of tons of altered peridotite MgO 10%, can not be directly applied in industry, can only be used as low-grade calcium magnesium phosphate fertilizer raw material, and the utilization rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put silicate olivine ore (altered peridotite or serpentine, MgO10%) and sintering aid (a mixture of palygorskite and magnesia powder) in a microwave kiln When the temperature is controlled to be lower than 600°C, the silicate olivine ore will lose crystallization water, and continue to be calcined at a high temperature. The time for calcination in the high temperature zone is 5 minutes, and the temperature in the high temperature zone is 1500°C. Cool to room temperature to obtain cooked Forsterite. Its main physical and chemical indicators are: MgO≥44%, refractoriness 1718°C, bulk density 3.20g / cm 3 .

[0016] The amount of sintering aid is 10% of the amount of olivine ore, and the mass ratio of palygorskite to magnesia powder is 5:1.

Embodiment 2

[0018] The amount of sintering aid is 15% of the amount of olivine ore, and the others are the same as in Example 1. The main physical and chemical indicators of the finished product are: MgO≥44%, refractoriness 1718°C, bulk density 3.20g / cm 3 .

Embodiment 3

[0020] The amount of sintering aid is 3% of the amount of olivine ore, and the others are the same as in Example 1. The main physical and chemical indicators of the finished product are: MgO≥44%, refractoriness 1715°C, bulk density less than 2.60 g / cm 3 (greater than 2.20g / cm 3 ).

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Abstract

The invention provides a method for preparing forsterite from olivine ores. The method comprises the following steps of calcining silicate olivine ores and a sintering aid in a microwave kiln at a temperature being lower than 600 DEG C for removing crystallization water out of the silicate olivine ores; continuing performing high-temperature calcination, wherein the time of calcining in a high-temperature area is 2 to 5 minutes and the temperature of the high-temperature area is 600 to 1,500 DEG C; and cooling to room temperature to obtain forsterite clinker, wherein the sintering aid is a mixture of palygorskite and magnesite powder.

Description

technical field [0001] The invention relates to a method for preparing forsterite from a novel olivine ore. Background technique [0002] Olivine is one of the rare resources in the world due to its site generation and mineral structure. Although our country is rich in resources, but the alteration is serious, the unaltered olivine MgO ≥ 44%, the ignition loss < 3% is only tens of millions of tons, and it is buried in the depth below hundreds of meters, and accounts for more than 90% of the olive It has been altered to varying degrees into peridotite and serpentine with MgO<40% and ignition loss>8%, especially hundreds of millions of tons of altered peridotite MgO<32% and ignition loss> 10%, which cannot be directly applied in industry, and can only be used as a low-grade calcium magnesium phosphate fertilizer raw material, and the utilization rate is low. [0003] In view of this practical problem, CN1807663A discloses a preparation method of high-grade for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B32/00
Inventor 陈志芳
Owner 新疆世全黄金矿业股份有限公司