I am afraid Aspose.Cells is a spreadsheet management library used to work with Excel files and conversions. So, you cannot directly convert Excel files to Word format.
Well, you can embed the entire Ms-Excel file into Ms-Word file using Object Linking and Embedding (OLE) Technology of Microsoft. However, I am not sure, if Aspose.Words supports it or not.
Also, Aspose.Words team has written a custom utility for converting Excel files to Word. Please post your query into Aspose.Words forum
, they will help you there.
Also, you can also take the images of your worksheets and insert them into your word file using combination of both components i.e Aspose.Cells and Aspose.Words. Please see the following documents for your reference