Deslagging agent for improving slagging and slagging efficiency in industrial silicon smelting and preparation method thereof

Abstract

The invention provides a slagging agent for improving slagging and slagging efficiency in industrial silicon smelting and a preparation method thereof. The slagging agent comprises the following main materials: calcium oxide and carbonaceous powder in a weight ratio of (1-3): (1-3). The preparation method of the slagging agent is characterized by comprising the following steps: firstly, crushing calcium oxide until the particle size is less than or equal to 3mm for later use, respectively preparing NaOH and a curing agent into a 25-50% NaOH solution and a 1.1-2.1% curing agent solution, uniformly mixing the NaOH solution and the curing agent solution, then adding the crushed calcium oxide and a mixture of charcoal powder, petroleum coke powder and dry powder binder, uniformly mixing, fully stirring in a material bin, enabling the materials to enter a ball pressing system under the action of self gravity to be cold-pressed into pellets, and drying the pellets. The carbon and calcium pellets replace large-particle limestone in a traditional process, the deslagging effect is obviously improved compared with that of a traditional method, the slag production rate is increased to 12.94% from 10.04% and is increased by 2.9%, due to the fact that the deslagging effect in a furnace is good, the furnace condition is improved, the yield is obviously increased, and the average daily yield is increased to 51.822 tons per day from 49.399 tons per day and is increased by 2.423 tons.

Description

technical field [0001] The invention belongs to the technical field of industrial silicon smelting, and in particular relates to a slagging agent for improving the slagging efficiency of industrial silicon smelting and a preparation method thereof. Background technique [0002] Industrial silicon is a product obtained by high temperature reduction smelting in a submerged arc furnace with silica as raw material and carbonaceous raw material as reducing agent. In the process of industrial silicon smelting, commonly used reducing agents include charcoal, petroleum coke, and washed coal. Charcoal has been used as the preferred reducing agent for industrial silicon smelting because of its characteristics of high fixed carbon, high specific resistance, and low impurity content. However, due to the influence of the ecological environment protection policy, the production of charcoal is prohibited. Industrial silicon production enterprises can only explore and use non-woody reducing...

AI Technical Summary

Problems solved by technology

It can be seen that the amount of slag removal agent added before the silicon is produced in each furnace is large, the cost is high, and it needs to be added in three times, and the workload is heavy.